X-Ray Emission from Hot DA White Dwarfs - EXOSAT Results and Implications for Atmospheric Models

Paerels, Frits; Heise, John

Netherlands

Abstract

We present the observations of the photospheric X-ray spectra of hot DA white dwarfs, obtained with the 500 lines mm -1 Transmission Grating Spectrometer on EXOSAT. These spectra cover the full soft X-ray band, at high wavelength resolution and statistical quality. They allow us to do an accurate measurement of the photospheric parameters, particularly of effective temperature and chemical composition of the atmosphere.

1989 IAU Colloq. 114: White Dwarfs
Exosat 0