Issue |
A&A
Volume 402, Number 1, April IV 2003
|
|
---|---|---|
Page(s) | 299 - 313 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20030213 | |
Published online | 07 April 2003 |
On the elemental abundance and isotopic mixture of mercury in HgMn stars
1
Atomic Astrophysics, Lund Observatory, Lund University, Box 43, 22100, Lund, Sweden
2
European Southern Observatory, Casilla 19001, Santiago 19, Chile
Corresponding author: L. Dolk, linus.dolk@astro.lu.se
Received:
2
July
2002
Accepted:
13
February
2003
Optical region spectra of 31 HgMn stars have been studied
for the abundance and isotope mixture of mercury. In the course of the
investigation the lines λ4358 and
λ
λ3984,6149 have been studied, with abundances
established for all three lines in several HgMn stars.
The mercury isotope mixture has been determined from high resolution spectra
of the λ3984 line.
Possible signs of an ionization anomaly have been detected by the comparison of the
abundance derived from the
line and the
lines in seven of the
observed HgMn stars. A possible
correlation of the mercury abundance with
has been detected. Possible
signs of a weak anticorrelation of the manganese and mercury abundance in HgMn stars have
been found, which could be interpreted as a sign of inhomogeneous surface distribution of these
elements. For a number of the HgMn stars in this study the mercury abundance and isotope
mixture are reported for the first time.
Key words: stars: abundances / stars: chemically peculiar
© ESO, 2003
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