Meet the family - the catalog of known hot subdwarf stars
Geier S, Ostensen RH, Nemeth P, Heber U, Fusillo NPG, Gänsicke BT, Telting J, Green EM, Schaffenroth J (2017)
Publication Status: Published
Publication Type: Conference contribution
Publication year: 2017
Publisher: DE GRUYTER POLAND SP ZOO
Book Volume: 26
Pages Range: 164-168
Journal Issue: 1
Abstract
In preparation for the upcoming all-sky data releases of the Gaia mission, we compiled a catalog of known hot subdwarf stars and candidates drawn from the literature and yet unpublished databases. The catalog contains 5613 unique sources and provides multi-band photometry from the ultraviolet to the far infrared, ground based proper motions, classifications based on spectroscopy and colors, published atmospheric parameters, radial velocities and light curve variability information. Using several different techniques, we removed outliers and misclassified objects. By matching this catalog with astrometric and photometric data from the Gaia mission, we will develop selection criteria to construct a homogeneous, magnitude-limited all-sky catalog of hot subdwarf stars based on Gaia data. As first application of the catalog data, we present the quantitative spectral analysis of 280 sdB and sdOB stars from the Sloan Digital Sky Survey Data Release 7. Combining our derived parameters with state-of-the-art proper motions, we performed a full kinematic analysis of our sample. This allowed us to separate the first significantly large sample of 78 sdBs and sdOBs belonging to the Galactic halo. Comparing the properties of hot subdwarfs from the disk and the halo with hot subdwarf samples from the globular clusters omega Cen and NGC 2808, we found the fraction of intermediate He-sdOBs in the field halo population to be significantly smaller than in the globular clusters.
Authors with CRIS profile
Peter Nemeth
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Ulrich Heber
Professur für Astronomie und Astrophysik
Johannes Schaffenroth
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Involved external institutions
Missouri State University
United States (USA) (US)
Universität Potsdam
Germany (DE)
University of Warwick
United Kingdom (GB)
Roque de los Muchachos Observatory / Observatorio del Roque de los Muchachos (ORM)
Spain (ES)
University of Arizona
United States (USA) (US)
United States (USA) (US)
Universität Potsdam
Germany (DE)
University of Warwick
United Kingdom (GB)
Roque de los Muchachos Observatory / Observatorio del Roque de los Muchachos (ORM)
Spain (ES)
University of Arizona
United States (USA) (US)
How to cite
APA:
Geier, S., Ostensen, R.H., Nemeth, P., Heber, U., Fusillo, N.P.G., Gänsicke, B.T.,... Schaffenroth, J. (2017). Meet the family - the catalog of known hot subdwarf stars. (pp. 164-168). DE GRUYTER POLAND SP ZOO.
MLA:
Geier, Stephan, et al. "Meet the family - the catalog of known hot subdwarf stars." DE GRUYTER POLAND SP ZOO, 2017. 164-168.
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