On the ultraviolet iron spectrum of pre-white dwarfs

Details On the ultraviolet iron spectrum of pre-white dwarfs On the ultraviolet iron spectrum of pre-white dwarfs

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290l..49s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 290, March 15, 1985, p. L49-L53.

Astronomy and Astrophysics

Astrophysics

24

Abundance, Iue, Stellar Evolution, Stellar Spectra, Subdwarf Stars, Ultraviolet Spectra, High Resolution, Iron, White Dwarf Stars

Scientific paper

The authors have detected numerous lines of Fe V, Fe VI, and Fe VII in high-resolution IUE spectra of two central stars and a number of very hot subdwarfs. The strengths of these lines vary widely from star to star, suggesting that the abundance of iron in the atmospheres of the immediate progenitors of white dwarfs in strongly variable. A possible explanation is elemental separation by gravity and radiation pressure.

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