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http://hdl.handle.net/2248/2154
Title: | Three Li-rich K Giants: IRAS 12327-6523, 13539-4153, and 17596-3952 |
Authors: | Reddy, B. E Lambert, D. L |
Keywords: | stars: abundances stars: carbon stars: chemically peculiar; stars: late-type |
Issue Date: | Jun-2005 |
Publisher: | University of Chicago Press |
Citation: | The Astronomical Journal, Vol. 129, pp. 2831 - 2835 |
Abstract: | We report on spectroscopic analyses of three K giants previously suggested to be Li-rich: IRAS 12327-6523, 13539-4153, and 17596-3952. High-resolution optical spectra and the LTE model atmospheres are used to derive the stellar parameters (Teff, log g, [Fe/H]), elemental abundances, and the isotopic ratio 12C/13C. IRAS 13539-4153 shows an extremely high Li abundance of log epsilon(Li) approx 4.2, a value 10 times greater 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 abundance 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 shows the presence of an IR excess, suggesting mass loss. A comparison is made between these three stars and previously recognized Li-rich giants. |
Description: | Open Access |
URI: | http://hdl.handle.net/2248/2154 |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Lambert.pdf | Open Access | 584.02 kB | Adobe PDF | ![]() View/Open |
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