Issue |
A&A
Volume 425, Number 1, October I 2004
|
|
---|---|---|
Page(s) | 263 - 270 | |
Section | Stellar atmospheres | |
DOI | https://doi.org/10.1051/0004-6361:20041011 | |
Published online | 10 September 2004 |
A spectroscopic atlas of the HgMn star HD 175640 (B9 V)
3040–10 000 Å
*,**,***
1
Istituto di Astrofisica Spaziale e Fisica Cosmica, CNR, via del Fosso del Cavaliere, 00133 Roma, Italy
2
Osservatorio Astronomico di Trieste, via GB Tiepolo 11, Trieste, Italy e-mail: castelli@ts.astro.it
3
European Southern Observatory, Casilla 19001, Santiago 19, Chile e-mail: shubrig@eso.org
Received:
2
April
2004
Accepted:
27
May
2004
We present a high resolution spectral atlas of the HgMn star
HD 175640 covering the 3040-10 000 Å region.
UVES spectra observed with 90 000-110 000 resolving power and signal
to noise ratio ranging from 200 to 400 are compared with a synthetic
spectrum computed with the SYNTHE code (Kurucz [CITE]). The model atmosphere is an
ATLAS12 model (Kurucz [CITE]) with parameters =
12 000 K,
= 3.95,
ξ = 0 km s-1. The stellar individual abundances in ATLAS12 were
derived from an iterative procedure. The starting atomic line lists
downloaded from the Kurucz website have been improved and extended
by examining different sources in the literature and by
comparing the computed profiles with the observed spectrum.
The high quality of the data allowed us to study
the isotopic and hyperfine structure for several lines of
,
,
,
,
, and
.
Numerous weak emission lines from
and
have been identified
in the red part of the spectrum, starting at ≈λ 5847 Å.
Two emission lines of
(mult. 10,
mult. 9) have been observed for the first time. All
and
emission
lines originate from the high excitation states
(
89 000 cm-1 for
and
62 000 cm-1 for
) with large transition probabilities
(
1.00). The synthetic spectrum superimposed on the observed spectrum
as well as the adopted improved atomic line lists are available at the CDS and
http://wwwuser.oat.ts.astro.it/castelli/stars.html.
An extended discussion
on each identified ion and related atomic data is available both on
the quoted website and in an electronic Appendix to the paper.
Key words: stars: abundances / line: identification / atomic data / stars: atmospheres / stars: chemically peculiar / stars: individual: HD 175640 (B9V)
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.