My publications in astronomy are also accessible online from the SAO/NASA Astrophysics Data Systems (ADS, Link)
Books
Guenther, E. W., & Geier, S., The Effects of Close-in Exoplanets on Their Host Stars, in: H. Lammer, M. Khodachenko (eds.), Characterizing Stellar and Exoplanetary Environments, Astrophysics and Space Science Library, Vol. 411, 169, Springer, 2015
Geier, S.;
Schwellenmacht - Kernenergie und Außenpolitik der Bundesrepublik Deutschland von 1949 bis 1980, Dissertation Universität Erlangen-Nürnberg, Erlangen 2013 (Link)
Geier, S.;
Schwellenmacht. Bonns heimliche Atomdiplomatie von Adenauer bis Schmidt, Schöningh Verlag, Paderborn 2013 (Link)
Geier, S,;
History of Nuclear Energy in Germany, in: A. Presas i Pruig (ed.), History of Nuclear Energy, Boston Studies in the Philosophy and History of Science, Springer, submitted
Refereed Journals
Geier, S.;
The population of hot subdwarf stars studied with Gaia. III. Catalogue of known hot subdwarf stars: Data Release 2, 2020, A&A, 635, 193
Irrgang, A., Geier, S., Kreuzer, S., Pelisoli, I., Heber, U.;
A stripped helium star in the potential black hole binary LB-1, 2020, A&A, 633, L5
Charpinet, S., Brassard, P., Fontaine, G., ... Geier, S., ... et al.;
TESS first look at evolved compact pulsators. Discovery and asteroseismic probing of the g-mode hot B subdwarf pulsator EC 21494-7018, 2019, A&A, 632, 90
Raddi, R., Hollands, M. A., Koester, D., Hermes, J. J., Gänsicke, B. T., Heber, U., Shen, K. J., Townsley, D. M., Pala, A. F., Reding, J. S., Toloza, O. F., Pelisoli, I., Geier, S., Gentile Fusillo, N. P., Munari, U., Strader, J.;
Partly burnt runaway stellar remnants from peculiar thermonuclear supernovae, 2019, MNRAS, 489, 1489
Schaffenroth, V., Barlow, B. N., Geier, S., Vuckovic, M., Kilkenny, D., Wolz, M., Kupfer, T., Heber, U., Drechsel, H., Kimeswenger, S., Marsh, T. R., Wolf, M., Pelisoli, I., Freudenthal, J., Dreizler, S., Kreuzer, S., Ziegerer, E.;
The EREBOS project: Investigating the effect of substellar and low-mass stellar companions on late stellar evolution. Survey, target selection, and atmospheric parameters, 2019, A&A, 630, 80
Ratzloff, J. K., Barlow, B. N., Kupfer, T., Corcoran, K. A., Geier, S., Bauer, E., Corbett, H. T., Howard, W. S., Glazier, A., Law, N. M.;
EVR-CB-001: An Evolving, Progenitor, White Dwarf Compact Binary Discovered with the Evryscope, 2019, ApJ, 883, 51
Irrgang, A., Geier, S., Heber, U., Kupfer, T., Fürst, F.;
PG 1610+062: a runaway B star challenging classical ejection mechanisms, 2019, A&A, 628, L5
Kepler, S. O., Pelisoli, I., Koester, D., Reindl, N., Geier, S., Romero, A. D., Ourique, G., Oliveira, C., Amaral, L.;
White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 14, 2019, MNRAS, 486, 2169
Reindl, N., Bainbridge, M., Pzrybilla, N., Geier, S., Prvak, M., Krticka, J., Østensen, R. H., Telting, J., Werner, K.;
Unravelling the baffling mystery of the ultrahot wind phenomenon in white dwarfs, 2019, MNRAS, 482, 93
Geier, S., Raddi, R., Gentile Fusillo, N. P., Marsh, T. R.;
The population of hot subdwarf stars studied with Gaia. II. The Gaia DR2 catalogue of hot subluminous stars, 2019, A&A, 621, 38
Gentile Fusillo, N. P., Tremblay, P.-E., Gänsicke, B. T., Manser, C. J., Cunningham, T., Cukanovaite, E., Hollands, M., Marsh, T. R., Raddi, R., Jordan, S., Toonen, S., Geier, S., Barstow, M., Cummings, J. D.;
The Gaia Data Release 2 catalogue of white dwarfs and a comparison with SDSS, 2018, MNRAS, 482, 4570
Latour, M., Randall, S. K., Calamida, A., Geier, S., Moehler, S.;
SHOTGLAS I: The ultimate spectroscopic census of extreme horizontal branch stars in Omega Centauri, 2018, A&A, 618, 15
Reindl, N., Geier, S., & Østensen, R. H.;
Discovery of two bright DO-type white dwarfs, 2018, MNRAS, 480, 1211
Schaffenroth, V., Geier, S., Heber, U., Gerber, R., Schneider, D., Ziegerer, E., Cordes, O.;
The MUCHFUSS photometric campaign, 2018, A&A, 614, 77
Raddi, R., Gentile Fusillo, N. P., Pala, A. F., Hermes, J. J., Gänsicke, B. T., Chote, P., Hollands, M. A., Henden, A., Catalán, S., Geier, S., Koester, D., Munari, U., Napiwotzki, R., Tremblay, P.-E.;
Multiband photometry and spectroscopy of an all-sky sample of bright white dwarfs, 2017, MNRAS, 472, 4173
Kupfer, T., Ramsay, G., van Roestel, J., Brooks, J., Macfarlane, S. A., Toma, R., Groot, P. J., Woudt, P. A., Bildsten, L., Marsh, T. R., Green, M. J., Breedt, E., Kilkenny, D., Freudenthal, J., Geier, S., Heber, U., Bagnulo, S., Blagorodnova, N., Buckley, D. A. H., Dhillon, V. S., Kulkarni, S. R., Lunnan, R., Prince, T. A.;
The OmegaWhite survey for short-period variable stars - V. Discovery of an ultracompact hot subdwarf binary with a compact companion in a 44 minute orbit, 2017, ApJ, 851, 28
Barlow, B. N., Kilkenny, D., Geier, S., Dunlap, B. H., Reichart, D. E., LaCluyze, A. P., Ivarsen, K. M., Haislip, J. B., Nysewander, M. C.;
Two-site Photometry and Spectroscopy of the Rapidly Pulsating sdB Star EC 22221-3152, 2017, PASP, 129, 4202
Ziegerer, E., Heber, U., Geier, S., Irrgang, A., Kupfer, T., Fürst, F., Schaffenroth, J.;
Spectroscopic twin to the hypervelocity sdO star US 708 and three fast sdB stars from the Hyper-MUCHFUSS project, 2017, A&A, 601, 58
Geier, S., Østensen, R. H., Nemeth, P., Gentile Fusillo, N. P., Gänsicke, B. T., Telting, J. H., Green, E. M., Schaffenroth, J.;
The population of hot subdwarf stars studied with Gaia I. The catalogue of known hot subdwarf stars, 2017, A&A, 600, 50
Kupfer, T., van Roestel, J., Brooks, J., Geier, S., Marsh, T. R., Groot, P. J., Bloemen, S., Prince, T. A., Bellm, E., Heber, U., Bildsten, L., Miller, A. A., Dyer, M. J., Dhillon, V. S., Green, M., Irawati, P., Laher, R., Littlefair, S. P., Shupe, D. L., Steidel, C. C., Rattansoon, S., Pettini, M.;
PTF1 J082340.04+081936.5: A hot subdwarf B star with a low mass white dwarf companion in an 87 minute orbit, 2017, ApJ, 835, 131
Nemeth, P., Ziegerer, E., Irrgang, A., Geier, S., Fürst, F., Kupfer, T., Heber, U.;
An Extremely Fast Halo Hot Subdwarf Star in a Wide Binary System, 2016, ApJ, 821, L13
Reindl, N., Geier, S., Kupfer, T., Bloemen, S., Schaffenroth, V., Heber, U., Barlow, B. N., Østensen, R. H.;
RV variable, hot post-AGB stars from the MUCHFUSS project - Classification, atmospheric parameters, formation scenarios, 2016, A&A, 587, 101
Latour, M., Heber, U., Irrgang, A., Schaffenroth, V., Geier, S., Hillebrandt, W., Röpke, F. K., Taubenberger, S., Kromer, M., Fink, M.;
Quantitative spectral analysis of the sdB star HD 188112: A helium-core white dwarf progenitor, 2016, A&A, 585, 155
Kupfer, T., Groot, P. J., Bloemen, S., Levitan, D., Steeghs, D., Marsh, T. R., Rutten, R. G. M., Nelemans, G., Prince, T. A., Fürst, F., Geier, S.;
Phase resolved spectroscopy and Kepler photometry of the ultracompact AM CVn binary SDSS J190817.07+394036.4, 2015, MNRAS, 453, 483
Casewell, S. L., Dobbie, P. D., Geier, S., Lodieu, N., Hambly, N. C.;
Optical spectroscopy of candidate Alpha Persei white dwarfs, 2015, MNRAS, 451, 4259
Geier, S., Kupfer, T., Heber, U., Schaffenroth, V., Barlow, B. N., Østensen, R. H., O'Toole, S. J., Ziegerer, E., Heuser, C., Maxted, P. F. L., Gänsicke, B. T., Marsh, T. R., Napiwotzki, R., Brünner, P., Schindewolf, M., Niederhofer, F.;
The catalogue of radial velocity variable hot subluminous stars from the MUCHFUSS project, 2015, A&A, 577, 26 (Corrigendum 2017, A&A, 602, 2)
Ziegerer, E., Volkert, M., Heber, U., Irrgang, A., Gänsicke, B. T., Geier, S.;
Candidate hypervelocity stars of spectral type G and K revisited, 2015, A&A, 576, L14
Randall, S. K., Bagnulo, S., Ziegerer, E., Geier, S., Fontaine, G.;
The enigmatic He-sdB pulsator LS IV -14°116: new insights from the VLT, 2015, A&A, 576, 65
Kupfer, T., Geier, S., Heber, U., Østensen, R. H., Barlow, B. N., Maxted, P. F. L., Heuser, C., Schaffenroth, V., Gänsicke, B. T.;
Hot subdwarf binaries from the MUCHFUSS project - Analysis of 12 new systems and a study of the short-period binary population, 2015, A&A, 576, 44
Geier, S., Fürst, F., Ziegerer, E., Kupfer, T., Heber, U., Irrgang, A., Wang, B., Liu, Z., Han, Z., Sesar, B., Levitan, D., Kotak, R., Magnier, E., Smith, K., Burgett, W. S., Chambers, K., Flewelling, H., Kaiser, N., Wainscoat, R., Waters, C.;
The fastest unbound star in our Galaxy ejected by a thermonuclear supernova, 2015, Science, 347, 1126
Geier, S.;
Hot subdwarfs: Small stars marking important events in stellar evolution. Ludwig Biermann Award Lecture 2014, 2015, Reviews in Modern Astronomy 27, Astronomical Notes, 336, 437
Scholz, R.-D., Heber, U., Heuser, C., Ziegerer, E., Geier, S., Niederhofer, F.;
An ancient F-type subdwarf from the halo crossing the Galactic plane, 2015, A&A, 574, 96
Schaffenroth, V., Classen, L., Nagel, K., Geier, S., Koen, C., Heber, U., Edelmann, H.;
Two candidate brown dwarf companions around core helium-burning stars, 2014, A&A, 570, 70
Telting, J. H., Baran, A. S., Nemeth, P., Østensen, R. H., Kupfer, T., Macfarlane, S., Heber, U., Aerts, C., Geier, S.;
KIC7668647: a 14 day beaming sdB+WD binary with a pulsating subdwarf, 2014, A&A, 570, 129
Mereghetti, S., La Palombara, N., Esposito, P., Gastaldello, F., Tiengo, A., Heber, U., Geier, S., Wilms, J.;
Constraints on the winds of hot subdwarf stars from X-ray observations of two sdB binaries with compact companions: CD -30 11223 and PG 1232-136, 2014, MNRAS, 441, 2684
Randall, S. K., Fontaine, G., Geier, S., van Grootel, V., Brassard, P.;
Mode identification based one time-series spectrophotometry for the bright rapid sdB pulsator EC 01541-1409, 2014, A&A, 563, 79
Schaffenroth, V., Geier, S., Heber, U., Kupfer, T., Ziegerer, E., Heuser, C., Classen, L., Cordes, O.;
Binaries discovered by the MUCHFUSS project: SDSS J162256.66+473051.1 – An eclipsing subdwarf B binary with a brown dwarf companion, 2014, A&A, 564, 98
Maxted, P. F. L., Bloemen, S., Heber, U., Geier, S., Wheatley, P. J., Marsh, T. R., Breedt, E., Sebastian, D., Faillace, G., Owen, C., Pulley, D., Smith, D., Kolb, U., Haswell, C. A., Southworth, J., Anderson, D. R., Smalley, B., Collier Cameron, A., Hebb, L., Simpson, E. K., West, R. G., Bochinski, J., Busuttil, R., Hadigal, S.;
EL CVn-type binaries – Discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems, 2014, MNRAS, 437, 1681
Geier, S., Østensen, R. H., Heber, U., Kupfer, T., Maxted, P. F. L., Barlow, B. N., Vuckovic, M., Tillich, A., Müller, S., Edelmann, H., Classen, L., McLeod, A. F.;
Orbital solutions of eight close sdB binaries and constraints on the nature of the unseen companions, 2014, A&A, 526, 95
Geier, S., Heber, U., Edelmann, H., Morales-Rueda, L., Kilkenny, D., O'Donoghue, D., Marsh, T. R., Copperwheat, C.;
Hot subdwarf stars in close-up view IV. Helium abundances and the 3He isotopic anomaly of subdwarf B star, 2013, A&A, 557, 122
Østensen, R. H., Geier, S., Schaffenroth, V., Beck, P., Bloemen, S., Lombaert, R., Nemeth, P., Papics, P. I., Tillich, A., Telting, J. H., Fox Machado, L., Littlefair, S., Aerts, C., Heber, U., Maxted, P. F. L., Gänsicke, B. T., Marsh, T. R., Napiwotzki, R.;
Binaries discovered by the MUCHFUSS project – FBS 0117+396: An sdB+dM binarywith a pulsating primary, 2013, A&A, 559, 35
Geier, S., Marsh, T. R., Wang, B., Dunlap, B., Barlow, B. N., Schaffenroth, V., Chen, X., Irrgang, A., Maxted, P. F. L., Ziegerer, E., Kupfer, T., Miszalski, B., Heber, U., Han, Z., Shporer, A., Telting, J. H., Gänsicke, B. T., Østensen, R. H., O'Toole, S. J., Napiwotzki, R.;
A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae, 2013, A&A, 554, 54
Schaffenroth, V., Geier, S., Drechsel, H., Heber, U., Wils, P., Østensen, R. H., Maxted, P. F. L., di Scala, G.;
A new bright eclipsing hot subdwarf binary from the ASAS and SuperWASP surveys, 2013, A&A, 553, 18
Geier, S., Heber, U., Heuser, C., Classen, L., O'Toole, S. J., Edelmann, H.;
The subdwarf B star SB 290 – A fast rotator on the extreme horizontal branch, 2013, A&A, 551, L4
Geier, S.;
Hot subdwarf stars in close-up view – III. Metal abundances of subdwarf B stars, 2013, A&A, 549, 110
Barlow, B. N., Kilkenny, D., Drechsel, H., Dunlap, B. H., O'Donoghue, D., Geier, S., O'Steen, R. G., Clemens, J. C., LaCluyze, A. P., Reichart, D. E., Haislip, J. B., Nysewander, M. C., Ivarsen, K. M.;
EC 10246-2707: a new eclipsing sdB+M dwarf binary, 2013, MNRAS, 430, 22
Naslim, N., Geier, S., Jeffery, C. S., Behara, N. T., Woolf, V. M., Classen, L.;
The helium-rich subdwarf CPD -20°1123: a post-common-envelope binary on to the extended horizontal branch, 2012, MNRAS, 423, 3031
Geier, S., Heber, U.;
Hot subdwarf stars in close-up view. II. Rotational properties of single and wide binary subdwarf B stars, 2012, A&A, 543, 149
Geier, S., Schaffenroth, V., Hirsch, H., Tillich, A., Heber, U., Maxted, P. F. L., Østensen, R. H., Barlow, B. N., O'Toole, S. J., Kupfer, T., Marsh, T. R., Gänsicke, B. T., Napiwotzki, R., Cordes, O., Müller, S., Classen, L., Ziegerer, E., Drechsel, H.;
MUCHFUSS - Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS, 2012, AN, 333, 431
Sebastian, D., Guenther, E. W., Schaffenroth, V., Gandolfi, D., Geier, S., Heber, U., Deleuil, M., Moutou, C.;
Multi-object spectroscopy of stars in the CoRoT fields. I. Early-type stars in the CoRoT-fields IRa01, LRa01, LRa02, 2012, A&A, 541, 34
Maxted, P. F. L., Anderson, D. R., Burleigh, M. R., Collier Cameron, A., Heber, U., Gänsicke, B. T., Geier, S., Kupfer, T., Marsh, T. R., Nelemans, G., O'Toole, S. J., Østensen, R. H., Smalley, B., West, R. G.;
Discovery of a stripped red giant core in a bright eclipsing binary system, 2011, MNRAS, 418, 1156
Geier, S., Classen, L., Heber, U.;
The Fast-Rotating, Low-gravity Subdwarf B Star EC 22081-1916: Remnant of a Common Envelope Merger Event, 2011, ApJ, 733, L13
Geier, S., Schaffenroth, V., Drechsel, H., Heber, U., Kupfer, T., Tillich, A., Østensen, R. H.,Smolders, K., Degroote, P., Maxted, P. F. L., Barlow, B. N., Gänsicke, B. T., Marsh, T. R., Napiwotzki, R.;
Binaries Discovered by the MUCHFUSS Project: SDSS J08205+0008—An Eclipsing Subdwarf B Binary with a Brown Dwarf Companion, 2011, ApJ, 731, L22
Geier, S., Napiwotzki, R., Heber, U., Nelemans, G.;
Binaries discovered by the SPY survey. VI. Discovery of a low mass companion to the hot subluminous planetary nebula central star EGB 5 - a recently ejected common envelope? 2011, A&A, 528, L16
Tillich, A., Heber, U., Geier, S., Hirsch, H., Maxted, P. F. L., Gänsicke, B. T., Marsh, T. R., Napiwotzki, R., Østensen, R. H., Scholz, R.-D.;
The Hyper-MUCHFUSS project: Probing the Galactic halo with sdB stars, 2011, A&A, 527, 137
Geier, S., Maxted, P. F. L., Napiwotzki, R., Østensen, R. H., Heber, U., Hirsch, H., Kupfer, T., Müller, S., Tillich, A., Barlow, B. N., Oreiro, R., Ottosen, T. A., Gänsicke, B. T., Marsh, T. R.;
Massive unseen companions to hot faint underluminous stars from SDSS (MUCHFUSS). Analysis of seven close subdwarf B binaries, 2011, A&A, 526, 39
Geier, S., Hirsch, H., Tillich, A., Maxted, P. F. L., Bentley, S. J., Østensen, R. H., Heber, U., Gänsicke, B. T., Marsh, T. R., Napiwotzki, R., Barlow, B. N., O'Toole, S. J.;
The MUCHFUSS project – Searching for hot subdwarf binaries with massive unseen companions. Survey and target selection for follow-up, 2011, A&A, 530, 28
Geier, S., Heber, U., Kupfer, T., Napiwotzki, R.; Binaries discovered by the SPY project .
V. GD 687 - a massive double degenerate binary progenitor that will merge within a Hubble time, 2010, A&A, 515, 37
Geier, S., Heber, U., Podsiadlowski, Ph., Edelmann, H., Napiwotzki, R., Kupfer, T., Müller, S.;
Hot subdwarf stars in close-up view I. Rotational properties of subdwarf B stars in close binary systems and nature of their unseen companions, 2010, A&A, 519, 25
Tillich, A., Geier, S., Heber, U., Hirsch, H., Maxted, P. F. L., Marsh, T., Gänsicke, B., Napiwotzki, R., Østensen, R., Scholz, R.-D.;
The HYPER-MUCHFUSS project—the constant high-velocity population, 2010, Ap&SS, 329, 69
Geier, S., Heber, U., Edelmann, H., Morales-Rueda, L., Napiwotzki, R.;
Metal abundances of subdwarf B stars - the extended sample, 2010, Ap&SS, 329, 127
Reed, M. D., Terndrup, D. M., Østensen, R., Geier, S., Gilker, J., Beck, P. G., Degroote, P., Vanautgaerden, J., Waelkens, C.;
An EC 14026 pulsator in a reflection binary, 2010, Ap&SS, 329, 83
Geier, S., Heber, U., Tillich, A., Hirsch, H., Edelmann, H., Schaffenroth, V., Kupfer, T., Müller, S., Maxted, P. F. L., Østensen, R., Podsiadlowski, Ph., Marsh, T. R., Gänsicke, B. T., Morales-Rueda, L., Nelemans, G., Napiwotzki, R., Günther, E. W., Carone, L.;
Hot subdwarfs in binary systems and the nature of their unseen companions, 2010, Ap&SS, 329, 91
Müller, S., Geier, S., Heber, U.;
The cool companion of AA Doradus – Brown dwarf or late M star? 2010, Ap&SS, 329, 101
Tillich, A., Geier, S., Heber, U., Hirsch, H., Maxted, P. F. L., Marsh, T. R., Gänsicke, B. T., Napiwotzki, R., Østensen, R., Scholz, R.-D.;
The HYPER-MUCHFUSS project—target selection and analysis, 2010, Ap&SS, 329, 63
Geier, S., Edelmann, H. and Heber, U., Morales-Rueda, L.;
Discovery of a close substellar companion to the hot subdwarf star HD149382 – The decisive influence of substellar objects on late stellar evolution, 2009, ApJ, 702, L96
Oreiro, R., Østensen, R. H., Green, E. M., & Geier, S.;
2M0415+0154: a new bright, short-period subdwarf B pulsator, 2009, A&A, 496, 827
Telting, J. H., Geier, S., Østensen, R. H., Heber, U., Glowienka, L., Nielsen, T., Nielsen, T.; Oreiro, R.; Frandsen, S.;
Time-resolved high-resolution spectroscopy of the bright pulsating subdwarf B star Balloon 090100001, 2008, A&A, 492, 815
Geier, S., Nesslinger, S., Heber, U., Randall, S. K., Edelmann, H., & Green, E. M.;
Tidal synchronisation of the subdwarf B binary PG 0101+039, 2008, A&A, 477, L13
Geier, S., Karl, C., Edelmann, H., Heber, U., & Napiwotzki, R.;
Hot Subdwarf Binaries with Heavy Compact Companions - Discovery of a hidden population of evolved neutron stars and black holes? 2007, AN, 328, 708
Geier, S., Nesslinger, S., Heber, U., Przybilla, N., Napiwotzki, R., & Kudritzki, R.-P.;
The hot subdwarf B + white dwarf binary KPD 1930+2752. A supernova type Ia progenitor candidate, 2007, A&A, 464, 299
Conference Proceedings and non-refereed Journals
Finch, N. L., Braker, I. P., Reindl, N., Barstow, M. A., Casewell, S. L., Burleigh, M., Kupfer, T., Kilkenny, D., Geier, S., Schaffenroth, V., Miller Bertolami, M. M., Taubenberger, S., Freudenthal, J.;
Spectral Analysis of Binary Pre-white Dwarf Systems, 2019, ASP Conf. Ser., 519, 231
de Jong, R. S., Agertz, O., Berbel, A. A., ... Geier, S., ..., et al.;
4MOST: Project overview and information for the First Call for Proposals, 2019, The Messenger, 175, 3
Reindl, N., Finch, N. L., Schaffenroth, V., Barstow, M. A., Casewell, S. L., Geier, S., Miller Bertolami, M. M., Taubenberger, S.;
Revealing the True Nature of Hen 2-428, 2018, Galaxies, 6, 88
Maier, P., Wolf, J., Keilig, T., Krabbe, A., Duffard, R, Ortiz, J.-L., Klinkner, S., Lengowski, M., Müller, T., Lockowandt, C., Krockstedt, C., Kappelmann, N., Stelzer, B., Werner, K., Geier, S., Kalkuhl, C., Rauch, T., Schanz, T., Barnstedt, J., Conti, L., Hanke, L.;
Towards a European Stratospheric Balloon Observatory: the ESBO design study, 2018, SPIE, 10700, 4
Finch, N. L., Reindl, N., Barstow, M, A., Casewell, S. L., Geier, S., Miller Bertolami, M. M., Taubenberger, S.;
Spectral analysis of the binary nucleus of the planetary nebula Hen 2-428 - first results, 2018, Open Astronomy, 27, 57
Schaffenroth, V., Barlow, B., Geier, S., Vučković, M., Kilkenny, D., Schaffenroth, J.;
News from the EREBOS project, 2017, Open Astronomy, 26, 208
Geier, S., Østensen, R. H., Nemeth, P., Heber, U., Gentile Fusillo, N. P., Gänsicke, B. T., Telting, J. H., Green, E. M., Schaffenroth, J.;
Meet the family - the catalog of known hot subdwarf stars, 2018, Open Astronomy, 26, 164
Casewell, S., Geier, S., Lodieu, N.;
New White Dwarf-Brown Dwarf Binaries, ASP Conf. Ser., 509, 133
Geier, S., Kupfer, T., Heber, U., Nemeth, P., Ziegerer, E., Irrgang, A., Schindewolf, M., Marsh, T. R., Gänsicke, B. T., Barlow, B. N., Bloemen, S.;
Close binary progenitors and ejected companions of thermonuclear supernovae, 2017, ASP Conf. Ser., 509, 79
Reindl, N., Geier, S., Kupfer, T., Schaffenroth, V., Heber, U., Barlow, B. N., Østensen, R. H.;
Discovery of radial velocity variable post-AGB stars from the MUCHFUSS project, 2015, EAS Pub. Ser., Vol. 71-72, 135
Geier, S., Kupfer, T., Schaffenroth, V., Heber, U., & the MUCHFUSS collaboration;
Hot subdwarfs in the Galactic halo - Tracers of prominent events in late stellar evolution, 2016, The General Assembly of Galactic Halos: Structure, Origin and Evolution, Proc. IAU Symposium 317, A. Bragaglia, M. Arnaboldi, M. Rejkuba & D. Romano, eds., 302
Geier, S,;
Why do hot subdwarf stars pulsate? 2016, Astronomy in Focus, Vol. 1, XXIXth IAU General Assembly, August 2015. P. Benvenuti, ed., 29B, 521
Sebastian, D., Guenther, E. W., Heber, U., Geier, S., Grziwa, S.;
Transiting Sub-stellar companions of Intermediate-mass stars, 2015, EPJWC, 10106056
Guenther, E. W., Cusano, F., Deeg, H., Gandolfi, D., Geier, S., Grziwa, S., Heber, U., Tal-Or, L., Sebastian, D., Rodler, F.;
A planet in a polar orbit of 1.4 solar-mass star, 2015, EPJWC, 10102001
Geier, S., Kupfer, T., Heber, U., Barlow, B. N., Maxted, P. F. L., Heuser, C., Schaffenroth, V., Ziegerer, E., Østensen, R. H., Gänsicke, B. T.;
The Population of White Dwarf Binaries with Hot Subdwarf Companions, 2015, ASP Conf. Ser., 493, 475
Gänsicke, B., Tremblay, P.-E., Barstow, M., Bono, G., Burleigh, M., Casewell, S., Dhillon, V., Farihi, J., Garcia-Berro, E., Geier, S., et al.;
Stellar archaeology with Gaia: the Galactic white dwarf population, 2015, ASP Conf. Ser., 507, 159
Geier, S.;
Heiße Unterzwerge. Kleine Sterne mit großer Bedeutung, 2015, Sterne und Weltraum, 4/2015, 38
Geier, S.;
Fellows at ESO, 2014, The Messenger, 157, 54
Arnaboldi, M., Delmotte, N., Geier, S., Mascetti, L., Micol, A., Retzlaff, J., Romaniello, M.;
Phase 3 Status and Access to Science Data Products from ESO Public Surveys, 2014, The Messenger, 156, 24
Arnaboldi, M., Rejkuba, M., Retzlaff, J., Delmotte, N., Geier, S., Hanuschik, R., Hilker, M., Hummel, W., Hussain, G., Ivanov, V. D., Micol, A., Mieske, S., Neeser, M., Petr-Gotzens, M., Szeifert, T.;
The ESO Public Surveys - Review of Milestones and Completion, 2014, The Messenger, 154, 18
Schaffenroth, V., Geier, S., Barbu-Barna, I., Heber, U., Cordes, O.;
New HW Virginis systems from the MUCHFUSS project, 2014, ASP Conf. Ser., 481, 253
Heber, U., Geier, S., Irrgang, A., Schneider, D., Barbu-Barna, I., Mereghetti, S., La Palombara, N.;
The mysterious X-ray sdO binary BD +37°442, 2014, ASP Conf. Ser., 481, 307
Kupfer, T., Geier, S., McLeod, A. F., Groot, P. J., Verbeek, K., Schaffenroth, V., Heber, U., Heuser, C., Ziegerer, E., Østensen, R. H., Nemeth, P., Dhillon, V. S., Telting, J. H., Sphorer, A., Fulton, B. J.;
Finding compact hot subdwarf binaries in the Galactic disc, 2014, ASP Conf. Ser., 481, 293
Geier, S., Kupfer, T., Barlow, B. N., Schaffenroth, V., Fürst, F., Heuser, C., Ziegerer, E., Heber, U., Marsh, T. R., Maxted, P. F. L., Østensen, R. H., O'Toole, S. J., Gänsicke, B. T., Napiwotzki, R.;
MUCHFUSS - Status and highlights, 2014, ASP Conf. Ser., 481, 243
Geier, S.;
Hot Subdwarf Formation: Confronting Theory with Observation, 2013, EPJ Web of Conferences, Volume 43, id.04001
Heber, U., Geier, S., Gänsicke, B. T.;
Hot subluminous Stars: Highlights from the MUCHFUSS and Kepler missions, 2013, EPJ Web of Conferences, Volume 43, id.04002
Geier, S., Marsh, T. R., Dunlap, B. H., Barlow, B. N., Schaffenroth, V., Ziegerer, E., Heber, U., Kupfer, T., Maxted, P. F. L., Miszalski, B., Shporer, A., Telting, J. H., Østensen, R. H., O'Toole, S. J., Gänsicke, B. T., Napiwotzki, R.;
Discovery of the closest hot subdwarf binary with white dwarf companion, 2013, ASP Conf. Ser., 469, 373
Gilmore, G., Randich, S., Asplund, M., ... (Geier, S.), et al.;
The Gaia-ESO Public Spectroscopic Survey, 2012, The Messenger, 147, 25
Geier, S., Classen, L., Brünner, P., Nagel, K., Schaffenroth, V., Heuser, C., Heber, U., Drechsel, H., Edelmann, H., Koen, C., O'Toole, S. J., Morales-Rueda, L.;
Low-mass Stellar and Substellar Companions to sdB Stars, 2012, ASP Conf Ser., 452, 153
Maxted, P. F. L., Anderson, D. R., Burleigh, M. R., Collier Cameron, A., Heber, U., Gänsicke, B. T., Geier, S., Kupfer, T., Marsh, T. R., Nelemans, G., O'Toole, S. J., Østensen, R. H., Smalley, B., West, R. G.;
Discovery of a stripped red giant core in a bright eclipsing binary system, 2012, ASP Conf. Ser., 452, 137
Geier, S., Schaffenroth, V., Hirsch, H., Tillich, A., Heber, U., Classen, L., Kupfer, T., Maxted, P. F. L., Østensen, R. H., Barlow, B. N., O'Toole, S. J., Marsh, T. R., Gänsicke, B. T., Cordes, O., Napiwotzki, R.;
The MUCHFUSS Project: Searching for the Most Massive Companions to Hot Subdwarf Stars in Close Binaries and Finding the Least Massive Ones, 2012, ASP Conf. Ser., 452, 129
Chountonov, G., Geier, S.;
HD 76431: An Evolved Hot Subdwarf with Variable Magnetic Field? 2012, ASP Conf Ser., 452, 93
Geier, S., Heber, U., Edelmann, H., Napiwotzki, R., Morales-Rueda, L.;
Rotational Properties of Single and Wide Binary Subdwarf B Stars, 2012, ASP Conf. Ser., 452, 81
Geier, S., Heber, U., Edelmann, H., Morales-Rueda, L., Kilkenny, D., O'Donoghue, D., Marsh, T. R., Copperwheat, C.;
Helium Abundances of Single and Wide Binary Subdwarf B Stars, 2012, ASP Conf. Ser., 452, 57
Classen, L., Geier, S., Heber, U., O'Toole, S. J.;
Radial Velocity Survey of Low-Mass Companions to sdB Stars, 2010, AIP Conf Ser., 1331, 297
Geier, S., Heber, U., Tillich, A., Hirsch, H., Kupfer, T., Schaffenroth, V., Classen, L., Maxted, P. F. L., Østensen, R. H., Barlow, B. N., Marsh, T. R., Gänsicke, B. T., Napiwotzki, R., O'Toole, S. J., Günther, E. W.;
Substellar Companions and the Formation of Hot Subdwarf Stars, 2011, AIP Conf Ser., 1331, 163
Schaffenroth, V., Geier, S., Heber, U., Drechsel, H., Østensen, R. H., Maxted, P. F. L., Kupfer, T., Barlow, B. N.;
Analysis of two eclipsing hot subdwarf binaries with a low mass stellar and a brown dwarf companion, 2010, AIP Conf Ser.,1314, 91
Geier, S., Heber, U., Tillich, A., Hirsch, H., Müller, S., Kupfer, T., Schaffenroth, V., Classen, L., Maxted, P. F. L., Østensen, R. H., Barlow, B. N., Marsh, T. R., Gänsicke, B. T., Napiwotzki, R., O'Toole, S. J.;
The MUCHFUSS Project - Searching for Massive Compact Companions to Hot Subdwarf Stars, 2010, AIP Conf Ser., 1314, 67
Geier, S., Heber, U., Tillich, A., Hirsch, H., Müller, S., Kupfer, T., Schaffenroth, V., Classen, L., Maxted, P. F. L., Østensen, R. H., Barlow, B. N., Marsh, T. R., Gänsicke, B. T., Napiwotzki, R., O'Toole, S. J.;
Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) - Status report, 2010, AIP Conf Ser., 1273, 263
Classen, L., Geier, S., Heber, U., O'Toole, S. J.;
RV survey of low-mass companions to sdB stars, 2010, AIP Conf Ser., 1273, 247
Schaffenroth, V., Geier, S., Heber, U., Drechsel, H., Østensen, R. H., Maxted, P. F. L., Kupfer, T., Barlow, B. N.;
Analysis of two eclipsing hot subdwarf binaries with a low mass stellar and a brown dwarf companion, 2010, AIP Conf Ser., 1273, 243
Tillich, A., Geier, S., Heber, U., Hirsch, H., Maxted, P.F.L., Gaensicke, B., et al.;
The HYPERMUCHFUSS campaign – An undiscovered high velocity population, 2009, JPhCS, 172a2009T
Geier, S., Heber, U., Edelmann, H., Kupfer, T., Napiwotzki, R., & Podsiadlowski, P.;
Hot subdwarf binaries – Masses and nature of their heavy compact companions, 2009, JPhCS, 172a2008G
Geier, S., Heber, U., & Napiwotzki, R.;
Metal abundances of subdwarf B stars from SPY - a pattern emerges, 2008, MmSAI, 79, 723
Geier, S., Karl, C., Edelmann, H., Heber, U., & Napiwotzki, R.;
Binary sdB stars with massive compact companions, 2008, MmSAI, 79, 608
Telting, J. H., Østensen, R. H., Geier, S., Heber, U., Glowienka, L., Nielsen, T., Frandsen, S.;
Time-Resolved High-Resolution Spectroscopy of the Bright sdBV Balloon 090100001, 2008, ASP Conf Ser., 392, 265
Geier, S., Heber, U., & Napiwotzki, R.;
Radial Velocity Variable sdO/Bs from SPY -- Preliminary Orbits of Three New Short Period Binaries, 2008, ASP Conf Ser., 392, 225
Geier, S., Karl, C., Edelmann, H., Heber, U., & Napiwotzki, R.;
Binary sdB Stars with Massive Compact Companions, 2008, ASP Conf Ser., 392, 207
Geier, S., Heber, U., & Napiwotzki, R.;
Metal Abundances of Subdwarf B Stars from SPY - a Pattern Emerges, 2008, ASP Conf Ser., 392, 159
Geier, S., Karl, C. A., Edelmann, H., Heber, U., & Napiwotzki, R.;
Spectroscopic Analysis of Subluminous B Stars in Binaries with Compact Companions, 2007, ASP Conf Ser., 372, 401
Geier, S., Nesslinger, S., Heber, U., Przybilla, N., Napiwotzki, R., & Kudritzki, R.-P.;
The Subdwarf B+ White Dwarf Binary KPD 1930+2752, a Supernova Type Ia Progenitor Candidate, 2007, ASP Conf Ser., 372, 393
Geier, S., Karl, C., Edelmann, H., Heber, U., & Napiwotzki, R.;
Spectroscopic Analysis of Subluminous B Stars in Binaries - Four Candidate Systems with Neutron Star/Black Hole Companions Discovered, 2006, Proceedings of the International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos - IX (astro.ph.10467G)
Geier, S., Karl, C., Edelmann, H., Heber, U., & Napiwotzki, R.;
Spectroscopic Analyses of subluminous B stars in binaries, 2006, Proceedings of the International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos, 101 (isna.confE.101G)
Geier, S., Heber, U., Przybilla, N., & Kudritzki, R.-P.;
Time-Resolved Spectroscopy of KPD 1930+2752, 2006, Baltic Astronomy, 15, 243
Karl, C., Heber, U., Jeffery, S., Napiwotzki, R., & Geier, S.;
Spectroscopic Analysis of sdB Binaries from the Spy Project, 2006, Baltic Astronomy, 15, 151
Newspaper Articles
Schöllgen, G., Geier, S.;
Schwellenmacht Deutschland. Die Atompolitik der Bundesregierungen von Adenauer bis Schmidt oder die Geschichte einer Beihilfe zur Erosion des internationalen Nichtverbreitungsregimes, 31. Mai 2012, FAZ, 125, 7 (Link)
