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Spectral analysis of hot subluminous stars
(Astronomical Society of the Pacific, 1999)
Optical spectra of 40 sdOB stars drawn from the Palomar Green and the Hamburg-Schmidt surveys are presented (including three EC 14026 stars). Eight of which are spectroscopic binaries.
A Comparative Study of the Mass Distribution of Extreme-Ultraviolet selected White Dwarfs
(1999)
We present new determinations of e ective temperature, surface gravity, and masses for a sample of 46 hot DA white dwarfs selected from the Extreme Ultraviolet Explorer (EUV E) and ROSAT Wide Field Camera bright source ...
Spectral analysis of the binary sdB star Feige 36
(Astronomical Society of the Pacific, 1999)
The sdB stars Feige 36 is a short-period, single-lined spectroscopic binary. Aymospheric parameters and abundances are determined from high-resolution Keck spectra. Feige 36 lies near the zero-age extreme Horizontal Branch ...
Masses and Other Parameters of the PostCommon Envelope Binary BE Ursae Majoris
(1999)
The binary star BE Ursae Majoris is recently emerged from the common envelope phase; indeed, the hot sdO/DAO component is the central star of the associated planetary nebula. As such, BE UMa represents an important test ...
How accurately do we know the parameters of hot DA white dwarfs
(Astronomical Society of the Pacific, 1999)
We present new determinations of effective temperature, surface gravity, and masses for a sample of hot DA white dwarfs selected from the EUVE and ROSAT Wide Field Camera bright source lists in the course of a near-IR ...
Optical spectroscopy of the candidate luminous white dwarf in the young Large Magellanic Cloud cluster NGC 1818
(1999)
An optical spectrum of the Elson et al. (1998) candidate luminous white dwarf in the young LMC cluster NGC1818 shows conclusively that it is not a degenerate star. A model atmosphere fit gives Teff 31,500K and log g 4.4, ...
Abundances of UV bright stars in globular clusters. I. ROA 5701 in omega Centauri and Barnard 29 in M 13
(1998)
Two UV brights stars in globular clusters, ROA 5701 (ω Cen) and Barnard 29 (M 13) are analysed from high-resolution UV and optical spectra. The main aim is the measurement of iron abundances from UV spectra obtained with ...
Hot UV bright stars in globular clusters
(1998)
We have obtained medium-resolution spectra of seven UV-bright stars discovered on images of four southern globular clusters obtained with the Ultraviolet Imaging Telescope (UIT). Effective temperatures, surface gravities ...
Temperature determination of the cool DO white dwarf HD 149499B from EUVE observations
(1997)
We present a LTE model atmosphere analysis of the EUVE medium and long wavelength spectrum of the cool DO white dwarf HD149499B. This observation in the spectral range 230-700°A supplements a previous analysis of an ORFEUS ...