| Issue |
A&A
Volume 474, Number 1, October IV 2007
|
|
|---|---|---|
| Page(s) | 307 - 314 | |
| Section | Atomic, molecular, and nuclear data | |
| DOI | https://doi.org/10.1051/0004-6361:20078082 | |
| Published online | 28 August 2007 | |
Atomic data for radioactive elements Ra I, Ra II, Ac I and Ac II and application to their detection in HD 101065 and HR 465*
1
Astrophysique et Spectroscopie, Université de Mons-Hainaut, 7000 Mons, Belgium e-mail: quinet@umh.ac.be
2
IPNAS (Bât. B15), Université de Liège, Sart Tilman, 4000 Liège, Belgium
3
Astrophysical Research Center for the Structure and Evolution of the Cosmos, Sejong University, Seoul 143-747, South Korea
4
Astronomical Observatory, Odessa National University, Park Shevchenko, Odessa 65014, Ukraine
Received:
14
June
2007
Accepted:
13
August
2007
Radiative data for transitions of astrophysical interest in radioactive elements Ra I, Ra II, Ac I and Ac II have been computed using a semi-empirical relativistic Hartree-Fock approach including core polarization effects. Most of the oscillator strengths reported in the present paper are new. A possible detection of radium (Ra II) and actinium (Ac II) in the spectrum of the stars HD 101065 and HR 465 is examined and discussed.
Key words: atomic data / stars: chemically peculiar
© ESO, 2007
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