Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-04-25
Astronomy and Astrophysics
Astrophysics
11 pages, 1 figure, accepted for publication by ApJ
Scientific paper
10.1086/589536
We present measurements of the fluorine abundance in a Galactic Bulge Asymptotic Giant Branch (AGB) star. The measurements were performed using high resolution K-band spectra obtained with the CRIRES spectrograph, which has been recently installed at ESO's VLT, together with state-of-the-art model atmospheres and synthetic spectra. This represents the first fluorine abundance measurement in a Galactic Bulge star, and one of few measurements of this kind in a third dredge-up oxygen-rich AGB star. The F abundance is found to be close to the solar value scaled down to the metallicity of the star, and in agreement with Disk giants that are comparable to the Bulge giant studied here. The measurement is of astrophysical interest also because the star's mass can be estimated rather accurately ($1.4 \lesssim M/\mathrm{M}_{\sun} \lesssim 2.0$). AGB nucleosynthesis models predict only a very mild enrichment of F in such low mass AGB stars. Thus, we suggest that the fluorine abundance found in the studied star is representative for the star's natal cloud, and that fluorine must have been produced at a similar level in the Bulge and in the Disk.
Aringer Bernhard
Kaufl Hans Ulrich
Lebzelter Thomas
Siebenmorgen Ralf
Smette Alain
No associations
LandOfFree
The fluorine abundance in a Galactic Bulge AGB star measured from CRIRES spectra 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 fluorine abundance in a Galactic Bulge AGB star measured from CRIRES spectra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The fluorine abundance in a Galactic Bulge AGB star measured from CRIRES spectra will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-728100