The HYPERMUCHFUSS campaign - An undiscovered high velocity population

Tillich A, Geier S, Heber U, Hirsch H, Maxted P, Gaensicke B, Marsh T, Napiwotzki R, Ostensen R, Copperwheat C (2009)

Publication Type: Conference contribution

Publication year: 2009

Publisher: Institute of Physics Publishing

Book Volume: 172

Conference Proceedings Title: Journal of Physics: Conference Series

DOI: 10.1088/1742-6596/172/1/012009

Abstract

We present an overview and a status report of HYPERMUCHFUSS (HYPER velocity or Massive Unseen Companions of Hot Faint Underluminious Stars Survey) aiming at the detection of a population of high velocity subluminous B stars and white dwarfs. The first class of targets consists of hot subdwarf binaries with massive compact companions, which are expected to show huge radial velocity variations. The second class is formed by the recently discovered Hyper-velocity stars, which are moving so fast that the dynamical ejection by a supermassive black hole seems to be the only explanation for their origin. Until now only one old HVS has been found, but we expect a larger population. We applied an effecient selection technique for hot subdwarfs and white dwarfs with high galactic restframe velocities from the SDSS spectral data base, which serve as first epoch observations for our campaign with the ESO VLT and NTT in Chile, the 3.5 m telescope at DSAZ observatory (Calar Alto) in Spain and the WHT on La Palma. The survey is nearing completion and provides us with promising candidates which will be followed up to measure their RV-curves to uncover massive companions or prove their nature as HVS. © 2009 IOP Publishing Ltd.

Authors with CRIS profile

Stephan Geier Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Ulrich Heber Naturwissenschaftliche Fakultät

Involved external institutions

University of Warwick GB United Kingdom (GB) University of Hertfordshire GB United Kingdom (GB) University of Keele GB United Kingdom (GB) Katholieke Universiteit Leuven (KUL) / Catholic University of Leuven BE Belgium (BE)

How to cite

APA:

Tillich, A., Geier, S., Heber, U., Hirsch, H., Maxted, P., Gaensicke, B.,... Copperwheat, C. (2009). The HYPERMUCHFUSS campaign - An undiscovered high velocity population. In Journal of Physics: Conference Series. Institute of Physics Publishing.

MLA:

Tillich, Alfred, et al. "The HYPERMUCHFUSS campaign - An undiscovered high velocity population." Proceedings of the Journal of Physics: Conference Series Institute of Physics Publishing, 2009.

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