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Modeling of Oxygen-Neon Dominated Accretion Disks in Ultracompact X-ray Binaries: 4U1626-67
K. Werner, T. Nagel, S. Dreizler +1
We report on first results of computing synthetic spectra from H/He-poor accretion disks in ultracompact LMXBs. We aim at the determination of the chemical composition of the very…
Observations of the pulsating subdwarf B star Feige 48: Constraints on evolution and companions
M. D. Reed, S. D. Kawaler
Since pulsating subdwarf B (sdBV or EC14026) stars were first discovered (Kilkenny et al, 1997), observational efforts have tried to realize their potential for constraining the in…
Helium-rich EHB Stars in Globular Clusters
S. Moehler, A. V. Sweigart, W. B. Landsman +1
Recent UV observations of the most massive Galactic globular clusters show a significant population of hot stars below the zero-age HB (``blue hook'' stars), which cannot be explai…
MSST observations of the pulsating sdB star PG1605+072
S. J O'Toole, S. Falter, U. Heber +4
We present the first results from the MultiSite Spectroscopic Telescope (MSST) observations of the sdBV star PG1605+072. Pulsating sdB stars (also known as EC14026 stars) offer the…
2MASSJ0516288+260738: Discovery of the first eclipsing late K + Brown dwarf system?
S. L. Schuh, G. Handler, H. Drechsel +22
We report the discovery of a new eclipsing system less than one arcminute south of the pulsating DB white dwarf KUV 05134+2605. The object could be identified with the point source…
A Possible New Transiting Planet
S. Dreizler, P. Hauschildt, W. Kley +4
Recently, 59 low-luminosity object transits were reported from the Optical Gravitational Lensing Experiment (OGLE). Our follow-up low-resolution spectroscopy of 16 candidates provi…