Alfred Tillich

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Context. High-velocity stars in the Galactic halo, e.g. the so-called hyper-velocity stars (HVS), are important tracers of the properties of the dark matter halo, in particular its mass. Aims. A search for the fastest stars among hot subdwarfs (sdB) in the halo is carried out to identify HVS, unbound to the Galaxy, and bound population II stars in order to(More)
gen der H~nde wegen chronischer interphMangealer Arthritis und der st~nclig eingekrfimmten Finger nieht zu beobachten, h,~askengesicht, unfhhig des geringsten Mienenspiels, trotzdem weiche, gespannte t Iaut mit Verkleinerung des Mundes, infolgedessen Schlucl~beschwerden, jedoch ohne Oesophagusveranderung ~. 4A. S.; Frau, 48 Jahre alt. AkrosMerose mit(More)
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars with massive compact companions like massive white dwarfs (M > 1.0 M ), neutron stars or stellar mass black holes. The existence of such systems is predicted by binary evolution theory and recent discoveries indicate that they exist(More)
and R. H. Østensen, K. Smolders, P. Degroote Institute of Astronomy, K.U.Leuven, Celestijnenlaan 200D, B-3001 Heverlee, Belgium and P. F. L. Maxted Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK and B. N. Barlow Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599-3255, USA and B. T. Gänsicke, T. R.(More)
Context. Stellar oscillations are an important tool to probe the interior of a star. Subdwarf B stars are core helium burning objects, but their formation is poorly understood as neither single star nor binary evolution can fully explain their observed properties. Since 1997 an increasing number of sdB stars has been found to pulsate forming two classes of(More)
In a large coordinated attempt to further our understanding of the p-mode pulsating sdB star PG 1605+072, the Multi-Site Spectroscopic Telescope (MSST) collaboration has obtained simultaneous time-resolved spectroscopic and photometric observations. The photometry was extended by additional WET data which increased the time base. This contribution outlines(More)
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(More)
We present results for the 2m spectroscopic part of the MultiSite Spectroscopic Telescope campaign, which took place in May/June 2002. In order to perform an asteroseismological analysis on the multiperiodic pulsating subdwarf B star PG 1605+072 we used over 150 hours of time resolved spectroscopy in order to search for and analyse line profile variations(More)
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