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Towards asteroseismology of the non-radial pulsating sdB star PG 1605+072
S. Falter, U. Heber, S. Dreizler +2
The recently discovered new class of sdB pulsators (sdBV) offers a powerful possibility for the investigation of their interior and thus their evolutionary history. The first step…
Photometric and Spectroscopic Monitoring of the sdBV star PG 1605+072: The Multi-Site Spectroscopic Telescope (MSST) Project
U. Heber, S. Dreizler, S. L. Schuh +2
A small fraction of subluminous B stars show short-period, multiperiodic light variations and form the new class of pulsating star known as EC 14026 variables, after the prototype.…
The Rotational Velocity of Helium-rich Pre-White Dwarfs
T. Rauch, S. Koeper, S. Dreizler +3
Previous investigations on hydrogen-rich white dwarfs generally yield only very small rotational velocities (v_rot sin i). We have analyzed line profiles in high-resolution optical…
Model Photospheres with Accelerated Lambda Iteration
K. Werner, J. L. Deetjen, S. Dreizler +3
We address the classical stellar-atmosphere problem and describe our method of numerical solution in detail. The problem consists of the solution of the radiation transfer equation…
Spectroscopic Analyses of the "Blue Hook" Stars in omega Centauri: A Test of the Late Hot Flasher Scenario
S. Moehler, A. V. Sweigart, W. B. Landsman +1
omega Cen contains the largest population of very hot horizontal branch (HB) stars known in a globular cluster. Recent UV observations (Whitney et al. 1998; D'Cruz et al. 2000) sho…
FUSE Spectroscopy of the Two Prototype White Dwarfs With Signatures of a Super-hot Wind
K. Werner, S. Dreizler, J. W. Kruk +1
The O VIII phenomenon describes the occurrence of ultra-high ionization absorption lines of the CNO elements (e.g. O VIII, N VII, C VI, and even Ne X) in the optical spectra hot of…