| Issue |
A&A
Volume 372, Number 2, June III 2001
|
|
|---|---|---|
| Page(s) | 571 - 578 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20010506 | |
| Published online | 15 June 2001 | |
Lithium on the surface of cool magnetic CP stars. II. Spectrum analysis of HD 83368 and HD 60435 with lithium spots*
1
Main Astronomical Observatory, National Academy of Sciences, Kiev 03680, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
2
Crimean Astrophysical Observatory, Nauchnyj, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
3
Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
4
Kazan State University, Kazan 420008, Russia, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
5
Dept. of Astronomy, Trieste Univ., 34131 Trieste, Italy, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
6
Simpheropol State University, Simpheropol 330000, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
7
Inst. d'Astronomie, Univ. Lausanne, 1290 Chavannes-des-Bois, Switzerland, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Corresponding author: A. V. Shavrina, This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
31
May
2000
Accepted:
2
April
2001
Abstract
As a further step in our Lithium project we present results of abundance
determination of some elements in the roAp star HD 60435. Possible NLTE
effects were considered.
Equivalent widths of spectral lines vary with rotational phase which suggests
nonuniform distribution of chemical elements over the stars' surface. Large
abundance differences derived from various ions of some rare earth elements
indicate their possible vertical stratification.
Two spots of enhanced lithium abundance were distinguished at the
magnetic poles on HD 60435 and their parameters derived.
The rotational axis inclination 
or 
and surface
magnetic field 
kG were determined for the first time
for HD 60435. The results are compared with HD 83368, the other star with
lines of lithium remarkably variable in intensity and wavelength.
Key words: stars: individual: HD 83368, HD 60435 / stars: abundances / stars: chemically peculiar / stars: magnetic field
Based on observations collected at the European Southern Observatory, La Silla, Chile (programme 56.E0-640).
© ESO, 2001
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