Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-11-14
Astron.Astrophys.363:L33,2000
Astronomy and Astrophysics
Astrophysics
4 pages, latex, 2 figures, Accepted for publication in A&AL
Scientific paper
We have observed the B I line at 2089.6 AA in the metal poor star HD 140283 with HST/STIS. The observation was an attempt to confirm the B abundances derived from the 2497 AA B I line in earlier works in general, and for for this star in particular (Edvardsson et al. 1994 A&A 290, 176; Kiselman & Carlsson 1996, A&A 311, 680). The resulting spectrum gained from 8 orbits of observations is hardly consistent with the boron abundance derived in the earlier works. A pure 10^B line could produce the feature observed but no reasonable process can produce such a ratio between 10^B and 11^B. More likely the analysed feature is affected by a statistical fluctuation. A conservative upper limit estimate of the NLTE corrected boron abundance gives a value marginally consistent with that derived from the 2497 AA line. We are proposing further observations to derive a more definite abundance from the line.
Edvardsson Bengt
Thoren Patrik
No associations
LandOfFree
The boron absorption line at 2089.6 AA in HD 140283 ? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The boron absorption line at 2089.6 AA in HD 140283 ?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The boron absorption line at 2089.6 AA in HD 140283 ? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-351358