Tillich, A., Geier, S., Heber, U. (Ulrich), 1954-, Hirsch, H. (Heiko), Maxted, P. F. L., Gänsicke, B. T. (Boris T.), Marsh, T. R., Napiwotzki, Ralf, Østensen, R. H. and Copperwheat, C. M.. (2009) The HYPERMUCHFUSS campaign – an undiscovered high velocity population. Journal of Physics: Conference Series, Vol.172 (No.1). 012009. ISSN 1742-6596

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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.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Dwarf stars, Double stars, White dwarf stars, B stars
Journal or Publication Title:	Journal of Physics: Conference Series
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	1742-6596
Date:	2009
Volume:	Vol.172
Number:	No.1
Page Range:	012009
Identification Number:	10.1088/1742-6596/172/1/012009
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
References:	Bromley B C Kenyon S J Geller M J Barcikowski E Brown W R and Kurtz M J 2006 ApJ 653 1194–1202 (Preprint arXiv:astro-ph/0608159) Brown W R Geller M J Kenyon S J & Kurtz M J 2005 ApJ 622 L33–L36 (Preprint arXiv:astro-ph/0501177) Brown W R Geller M J Kenyon S J & Kurtz M J 2006 ApJ 640 L35–L38 (Preprint arXiv:astro-ph/0601580) Brown W R Geller M J Kenyon S J Kurtz M J and Bromley B C 2007 ApJ 660 311–318 (Preprint arXiv:astroph/ 0701600) Brown W R Geller M J and Kenyon S J 2008 ArXiv e-prints (Preprint 0808.2469) Conlon E S Dufton P L Keenan F P McCausland R J H and Holmgren D 1992 ApJ 400 273–279 Dehnen W and Binney J 1998 MNRAS 294 429–+ (Preprint arXiv:astro-ph/9612059) Edelmann H Napiwotzki R Heber U Christlieb N and Reimers D 2005 ApJ 634 L181–L184 (Preprint arXiv:astroph/ 0511321) Ghez A M Salim S Hornstein S D Tanner A Lu J R Morris M Becklin E E and Duchˆene G 2005 ApJ 620 744–757 (Preprint arXiv:astro-ph/0306130) Ginsburg I and Loeb A 2006 MNRAS 368 221–225 (Preprint arXiv:astro-ph/0510574) Gnedin O Y Gould A Miralda-Escud´e J and Zentner A R 2005 ApJ 634 344–350 (Preprint arXiv:astroph/ 0506739) Hills J G 1988 Nature 331 687–689 Hirsch H A Heber U O’Toole S J & Bresolin F 2005 A&A 444 L61–L64 (Preprint arXiv:astro-ph/0511323) Lu Y Yu Q & Lin D N C 2007 ApJ 666 L89–L92 (Preprint 0707.1872) Maxted P f L Heber U Marsh T R and North R C 2001 MNRAS 326 1391–1402 (Preprint arXiv:astro-ph/0103342) Moni Bidin C Catelan M and Altmann M 2008 A&A 480 L1–L4 (Preprint 0801.4795) Przybilla N Nieva M F Heber U and Butler K 2008a ApJ 684 L103–L106 Przybilla N Nieva M F Tillich A Heber U Butler K and Brown W R 2008b A&A 488 L51–L54 Przybilla N Nieva M F Heber U Firnstein M Butler K Napiwotzki R and Edelmann H 2008c A&A 480 L37–L40 (Preprint 0801.4456) Sch¨odel R Ott T Genzel R Hofmann R Lehnert M Eckart A Mouawad N Alexander T Reid M J Lenzen R Hartung M Lacombe F Rouan D Gendron E Rousset G Lagrange A M Brandner W Ageorges N Lidman C Moorwood A F M Spyromilio J Hubin N and Menten K M 2002 Nature 419 694–696 (Preprint arXiv:astroph/ 0210426) Sesana A Madau P and Haardt F 2008 ArXiv e-prints (Preprint 0810.3848) Yu Q and Tremaine S 2003 ApJ 599 1129–1138 (Preprint arXiv:astro-ph/0309084)
URI:	http://wrap.warwick.ac.uk/id/eprint/39786

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