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IUE Echelle Observations of the Photospheres and Circumstellar Environments of Hot White Dwarfs

Holberg, J. B.

Exposed white dwarfs in dwarf novae

Sion, Edward M.

Hubble Space Telescope far ultraviolet spectroscopic observations of cataclysmic variable white dwarfs, exposed during dwarf nova quiescence, have yielded a number of new insights on accretional heating, photospheric abundances of the accreted atmosphere and rotational velocities of the underlying degenerates. Recent results of synthetic spectral …

IUE and Optical Observations of DAO White Dwarfs

Holberg, J. B.; Tweedy, R. W.; Collins, J.

IUE Echelle observations of the photospheres and circumstellar environments of hot white dwarfs

Holberg, J. B.

For well over a decade, narrow, interstellar-like features have been observed in the high resolution ME spectra of many hot white dwarfs. It is now clear that these features originate in at least two different environments. In many of the hottest white dwarfs these features are formed in the stellar photosphere by trace amounts of key ions of C, N…