Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...524..974r&link_type=abstract
The Astrophysical Journal, Volume 524, Issue 2, pp. 974-982.
Astronomy and Astrophysics
Astronomy
10
Stars: Abundances, Stars: Early-Type, Stars: Peculiar, Ultraviolet: Stars
Scientific paper
We determine nitrogen abundances from co-added IUE high-dispersion SWP spectrograms of four HgMn stars and five normal or superficially normal main-sequence B and A stars. We find N deficiencies in the HgMn stars greater than previously reported (depletion factors of 135-400 relative to the Sun). N abundance discrepancies from UV and IR studies of normal stars are discussed in light of possible non-LTE effects. Our data set for our sample of HgMn stars (observed with a consistent strategy to maximize the benefits of co-additions) is an improvement over the single or few images previously used to derive N abundances for most of these stars.
Adelman Saul J.
Leckrone David S.
Roby Scott W.
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