Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..269b&link_type=abstract
In NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 269-272 (SEE N85-20961 1
Astronomy and Astrophysics
Astronomy
8
Stellar Mass Ejection, Stellar Spectra, Subdwarf Stars, White Dwarf Stars, Absorption Spectra, Iue, Stellar Luminosity
Scientific paper
Previous IUE studies found sharp, shortward-displaced absorption features in two DA white dwarfs (Bruhweiler and Kondo 1981, 1983) and in three O subdwarfs (Bruhweiler and Dean 1983) indicative of mass loss. Anomalous abundances and the presence of subordinate lines, especially in the case of the DA white dwarf, 2111+49, rules out an interstellar origin for these features. Continued analysis of new and archival data added one DA white dwarf and possibly two) subdwarfs to the growing list of subluminous stars displaying these features. One, possibly both, of these new O subdwarfs are of extreme low luminosity, intermediate between normal O subdwarfs and the the hot white dwarfs. These observations provide evidence that a single mechanism is responsible for the unusual features seen in O subdwarfs and DA white dwarfs.
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