Publications (88)
Hot subdwarf binaries from the MUCHFUSS project - Analysis of 12 new systems and a study of the short-period binary population
T. Kupfer, S. Geier, U. Heber +6
Selecting asteroids for a targeted spectroscopic survey
D. A. Oszkiewicz, T. Kwiatkowski, T. Tomov +4
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?
S. Geier, R. Napiwotzki, U. Heber +1
Serendipitous discovery of a projected pair of QSOs separated by 4.5 arcsec on the sky
K. E. Heintz, J. P. U. Fynbo, J. -K. Krogager +8
HD 76431 - An evolved hot subdwarf with variable magnetic field?
G. Chountonov, S. Geier
The fast rotating, low gravity subdwarf B star EC 22081-1916 - Remnant of a common envelope merger event
S. Geier, L. Classen, U. Heber
RV variable, hot post-AGB stars from the MUCHFUSS project - Classification, atmospheric parameters, formation scenarios
N. Reindl, S. Geier, T. Kupfer +5
Radial Velocity search for substellar companions to sdB stars
S. J. O'Toole, U. Heber, S. Geier +2
Tidal synchronization of the subdwarf B binary PG 0101+039
S. Geier, S. Nesslinger, U. Heber +3
The metal-enriched host of an energetic gamma-ray burst at z ~ 1.6
T. Krühler, J. P. U. Fynbo, S. Geier +7
Spectroscopic Analysis of Subluminous B Stars in Binaries - Four Candidate Systems with Neutron Star/Black Hole Companions Discovered
S. Geier, C. Karl, H. Edelmann +2
Discovery of a stripped red giant core in a bright eclipsing binary star
P. F. L. Maxted, D. R. Anderson, M. R. Burleigh +12
The fastest unbound star in our Galaxy ejected by a thermonuclear supernova
S. Geier, F. Fürst, E. Ziegerer +17
Binaries discovered by the MUCHFUSS project; FBS 0117+396: An sdB+dM binary with a pulsating primary
R. H. Ãstensen, S. Geier, V. Schaffenroth +16
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
S. Mereghetti, N. La Palombara, P. Esposito +5
Substellar companions and the formation of hot subdwarf stars
S. Geier, U. Heber, A. Tillich +12
Hot subdwarf stars in close-up view - III. Metal abundances of subdwarf B stars
S. Geier
Binary sdB Stars with Massive Compact Companions
S. Geier, C. Karl, H. Edelmann +2
Rotational properties of single and wide binary subdwarf B stars
S. Geier, U. Heber, H. Edelmann +2
The population of white dwarf binaries with hot subdwarf companions
S. Geier, T. Kupfer, U. Heber +7
Analysis of Two Eclipsing Hot Subdwarf Binaries with a Low Mass Stellar and a Brown Dwarf Companion
V. Schaffenroth, S. Geier, U. Heber +6
The MUCHFUSS project - Searching for hot subdwarf binaries with massive unseen companions: Survey, target selection and atmospheric parameters
S. Geier, H. Hirsch, A. Tillich +9
KIC7668647: a 14 day beaming sdB+WD binary with a pulsating subdwarf
J. H. Telting, A. S. Baran, P. Nemeth +6
The MUCHFUSS project - Searching for the most massive companions to hot subdwarf stars in close binaries and finding the least massive ones
S. Geier, V. Schaffenroth, H. Hirsch +12
Multi-object spectroscopy of stars in the CoRoT fields I: Early-type stars in the CoRoT-fields IRa01, LRa01, LRa02
D. Sebastian, E. W. Guenther, V. Schaffenroth +5
The helium-rich subdwarf CPD-20 1123: a post-common envelope binary evolving onto the extended horizontal branch
N. Naslim, S. Geier, C. S. Jeffery +3
Discovery of a close substellar companion to the hot subdwarf star HD 149382 - The decisive influence of substellar objects on late stellar evolution
S. Geier, H. Edelmann, U. Heber +1
Why do hot subdwarf stars pulsate?
S. Geier
Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution
J. HanuÅ¡, J. Äurech, M. Brož +116
The population of hot subdwarf stars studied with Gaia I. The catalogue of known hot subdwarf stars
S. Geier, R. H. Ãstensen, P. Nemeth +5
The hot subdwarf B + white dwarf binary KPD 1930+2752 - a Supernova Type Ia progenitor candidate
S. Geier, S. Nesslinger, U. Heber +3
Finding compact hot subdwarf binaries in the Galactic disc
T. Kupfer, S. Geier, A. Faye McLeod +15
The Hyper-MUCHFUSS project: probing the Galactic halo with sdB stars
A. Tillich, U. Heber, S. Geier +7
Binaries discovered by the MUCHFUSS project SDSS J08205+0008 - An eclipsing subdwarf B binary with brown dwarf companion
S. Geier, V. Schaffenroth, H. Drechsel +11
New HW Virginis Systems from the MUCHFUSS Project
V. Schaffenroth, S. Geier, I. Barbu-Barna +3
Spectroscopic twin to the hypervelocity sdO star US 708 and three fast sdB stars from the Hyper-MUCHFUSS project
E. Ziegerer, U. Heber, S. Geier +4
A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae
S. Geier, T. R. Marsh, B. Wang +17
A new bright eclipsing hot subdwarf binary from the ASAS and SuperWASP surveys
V. Schaffenroth, S. Geier, H. Drechsel +5
Hot subdwarfs in the Galactic halo - Tracers of prominent events in late stellar evolution
S. Geier, T. Kupfer, V. Schaffenroth +2
Binaries discovered by the SPY project V. GD 687 - a massive double degenerate binary progenitor that will merge within a Hubble time
S. Geier, U. Heber, T. Kupfer +1
Quantitative spectral analysis of the sdB star HD 188112: a helium-core white dwarf progenitor
M. Latour, U. Heber, A. Irrgang +7
Space Telescope and Optical Reverberation Mapping Project. III. Optical Continuum Emission and Broad-Band Time Delays in NGC 5548
M. M. Fausnaugh, K. D. Denney, A. J. Barth +94
Discovery of the closest hot subdwarf binary with white dwarf companion
S. Geier, T. R. Marsh, B. H. Dunlap +13
The High A(V) Quasar Survey: Reddened quasi-stellar objects selected from optical/near-infrared photometry - II
J. -K. Krogager, S. Geier, J. P. U. Fynbo +9
Super Luminous Ic Supernovae: catching a magnetar by the tail
C. Inserra, S. J. Smartt, A. Jerkstrand +37
EC 10246-2707: a new eclipsing sdB + M dwarf binary
B. N. Barlow, D. Kilkenny, H. Drechsel +10
The extended High A(V) Quasar Survey: Searching for dusty absorbers toward mid-infrared selected quasars
J. -K. Krogager, J. P. U. Fynbo, K. E. Heintz +6
Phase resolved spectroscopy and Kepler photometry of the ultracompact AM CVn binary SDSS J190817.07+394036.4
T. Kupfer, P. J. Groot, S. Bloemen +8
Kepler423b: a half-Jupiter mass planet transiting a very old solar-like star
D. Gandolfi, H. Parviainen, H. J. Deeg +16
An ancient F-type subdwarf from the halo crossing the Galactic plane
R. -D. Scholz, U. Heber, C. Heuser +3
Metal Abundances of Subdwarf B Stars from SPY - a Pattern Emerges
S. Geier, U. Heber, R. Napiwotzki
Hot subdwarf stars and their connection to thermonuclear supernovae
S. Geier, T. Kupfer, E. Ziegerer +4
Hot subdwarfs - Small stars marking important events in stellar evolution
S. Geier
Hot subdwarf stars in close-up view IV. Helium abundances and the $^3$He isotopic anomaly of subdwarf B star
S. Geier, U. Heber, H. Edelmann +5
Optical spectroscopy of candidate Alpha Persei white dwarfs
S. L. Casewell, P. D. Dobbie, S. Geier +2
Radial Velocity Variable sdO/Bs from SPY - Preliminary Orbits of Three New Short Period Binaries
S. Geier, U. Heber, R. Napiwotzki
Helium abundances and the helium isotope anomaly of sdB stars
S. Geier, U. Heber, H. Edelmann +5
Space Telescope and Optical Reverberation Mapping Project VI: reverberating Disk Models for NGC 5548
D. Starkey, Keith Horne, M. M. Fausnaugh +90
Hot subdwarf stars in close-up view - II. Rotational properties of single and wide binary subdwarf B stars
S. Geier, U. Heber
Binaries discovered by the MUCHFUSS project: SDSS J162256.66$+$473051.1 - An eclipsing subdwarf B binary with a brown dwarf companion
V. Schaffenroth, S. Geier, U. Heber +5
Close binary progenitors and ejected companions of thermonuclear supernovae
S. Geier, T. Kupfer, U. Heber +8
Orbital solutions of eight close sdB binaries and constraints on the nature of the unseen companions
S. Geier, R. H. Oestensen, U. Heber +9
Radial Velocity Survey of Low-Mass Companions to sdB Stars
L. Classen, S. Geier, U. Heber +1
Spectroscopic Analysis of subluminous B Stars in Binaries with compact Companions
S. Geier, C. Karl, H. Edelmann +2
Two candidate brown dwarf companions around core helium-burning stars
V. Schaffenroth, L. Classen, K. Nagel +4
Candidate hypervelocity stars of spectral type G and K revisited
E. Ziegerer, M. Volkert, U. Heber +3
Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-Line Analysis for NGC 5548
L. Pei, M. M. Fausnaugh, A. J. Barth +153
Determining the fraction of reddened quasars in COSMOS with multiple selection techniques from X-ray to radio wavelengths
K. E. Heintz, J. P. U. Fynbo, P. Møller +8
EL CVn-type binaries - Discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems
P. F. L. Maxted, S. Bloemen, U. Heber +21
Massive unseen companions to hot faint underluminous stars from SDSS (MUCHFUSS) - Analysis of seven close subdwarf B binaries
S. Geier, P. F. L. Maxted, R. Napiwotzki +12
Time resolved spectroscopy of KPD1930+2752
S. Geier, U. Heber, N. Przybilla +1
The subdwarf B star SB 290 - A fast rotator on the extreme horizontal branch
S. Geier, U. Heber, C. Heuser +3
Optical/near-infrared selection of red QSOs: Evidence for steep extinction curves towards galactic centers?
J. P. U. Fynbo, J. -K. Krogager, B. Venemans +5
Discovery of a stripped red giant core in a bright eclipsing binary system
P. F. L. Maxted, D. R. Anderson, M. R. Burleigh +11
Discovery of the broad-lined Type Ic SN 2013cq associated with the very energetic GRB 130427A
D. Xu, A. de Ugarte Postigo, G. Leloudas +25
Space Telescope and Optical Reverberation Mapping Project. IV. Anomalous behavior of the broad ultraviolet emission lines in NGC 5548
M. R. Goad, K. T. Korista, G. De Rosa +99
The catalogue of radial velocity variable hot subluminous stars from the MUCHFUSS project
S. Geier, T. Kupfer, U. Heber +13
The subdwarf B + white dwarf binary KPD 1930+2752 - a Supernova Type Ia progenitor candidate
S. Geier, S. Nesslinger, U. Heber +3
Hot subdwarf stars in close-up view I. Rotational properties of subdwarf B stars in close binary systems and nature of their unseen companions
S. Geier, U. Heber, Ph. Podsiadlowski +4
The mysterious sdO X-ray binary BD+37 442
U. Heber, S. Geier, A. Irrgang +4
Low-mass stellar and substellar companions to sdB stars
S. Geier, L. Classen, P. Bruenner +9
Spectroscopic Analysis of sdB Binaries from the SPY Project
C. Karl, U. Heber, R. Napiwotzki +1
The enigmatic He-sdB pulsator LS IV$-$14$^\circ$116: new insights from the VLT
S. K. Randall, S. Bagnulo, E. Ziegerer +2
The Galaxy Counterparts of the two high-metallicity DLAs at z=2.412 and z=2.583 towards Q0918+1636
J. P. U. Fynbo, S. Geier, L. Christensen +9
MUCHFUSS - Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS
S. Geier, V. Schaffenroth, H. Hirsch +15
GRB 120422A/SN 2012bz: Bridging the Gap between Low- And High-Luminosity GRBs
S. Schulze, D. Malesani, A. Cucchiara +62
Hot Subdwarf Formation: Confronting Theory with Observation
S. Geier
Cosmic-ray origin in OB associations and preferential acceleration of refractory elements: Evidence from abundances of elements 26Fe through 34Se
B. F. Rauch, J. T. Link, K. Lodders +15