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The MSST Campaign: II.Effective temperature and gravity variations in the multi-periodic pulsating subdwarf B star PG1605+072
A. Tillich, U. Heber, S. J. O'Toole +2
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 si…
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…
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…
Simultaneous time-series spectroscopy and multi-band photometry of the sdBV PG 1605+072
S. Falter, U. Heber, S. Dreizler +3
We present time-series spectroscopy and multi-band photometry of the sdBV PG 1605+072 carried out simultaneously at the Calar Alto 2.2m and 3.5m telescopes. The periodogram analysi…
Spectral Types of Planetary Host Star Candidates: Two New Transiting Planets?
S. Dreizler, T. Rauch, P. Hauschildt +3
Recently, 46 low-luminosity object transits were reported from the Optical Gravitational Lensing Experiment. Our follow-up spectroscopy of the 16 most promising candidates provides…
Equilibrium abundances in hot DA white dwarfs as derived from self-consistent diffusion models I. Analysis of spectroscopic EUVE data
S. L. Schuh, S. Dreizler, B. Wolff
We present the first analysis of an EUV selected sample of hot DA white dwarfs using a new type of atmospheric models. These models take into account the interplay between gravitat…