Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-03-11
Astronomy and Astrophysics
Astrophysics
17 pages, 6 figures, accepted for AJ
Scientific paper
10.1086/430190
We report on spectroscopic analyses of three K giants previously suggested to be Li-rich: IRAS 12327-6523, IRAS 13539-4153, and IRAS 17596-3952. High-resolution optical spectra and the LTE model atmospheres are used to derive the stellar parameters: ($T_{\rm eff}$, log $g$, [Fe/H]), elemental abundances, and the isotopic ratio $^{12}$C/$^{13}$C. IRAS 13539-4153 shows an extremely high Li abundance of $\log\epsilon$(Li) $\approx$ 4.2, a value ten times more than the present Li abundance in the local interstellar medium. This is the third highest Li abundance yet reported for a K giant. IRAS 12327-6523 shows a Li abundances of $\log\epsilon$(Li)$\approx$ 1.4. IRAS 17596-3952 is a rapidly rotating ($V{\sin i}$ $\approx$ 35 km s$^{-1}$) K giant with $\log\epsilon$(Li) $\approx$ 2.2. Infrared photometry which shows the presence of an IR excess suggesting mass-loss. A comparison is made between these three stars and previously recognized Li-rich giants.
Lambert David L.
Reddy Bacham E.
No associations
LandOfFree
Three Li-rich K giants: IRAS 12327-6523, IRAS 13539-4153, and IRAS 17596-3952 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 Three Li-rich K giants: IRAS 12327-6523, IRAS 13539-4153, and IRAS 17596-3952, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three Li-rich K giants: IRAS 12327-6523, IRAS 13539-4153, and IRAS 17596-3952 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-345744