2013MNRAS.430..611M

Query : 2013MNRAS.430..611M

2013MNRAS.430..611M - Mon. Not. R. Astron. Soc., 430, 611-620 (2013/March-3)

Lithium-rich field giants in the Sloan Digital Sky Survey.

MARTELL S.L. and SHETRONE M.D.

Abstract (from CDS):

We present a search for post-main-sequence field stars in the Galaxy with atypically large lithium abundances. Using moderate-resolution spectra taken as part of the Sloan Digital Sky Survey, along with high-resolution followup spectroscopy from the Hobby-Eberly Telescope, we identify 23 post-turnoff stars with log ε(Li) greater than 1.95, including 14 with log ε(Li) ≥ 2.3 and 8 with log ε(Li) ≥ 3.0, well above the low level expected for evolved stars. Comparison with theoretical isochrones indicates that some of our Li-rich stars are affiliated with the upper red giant branch, the asymptotic giant branch and the red clump rather than the RGB bump, which is a challenge to existing models of Li production in evolved stars.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): stars: abundances

Simbad objects: 40

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Number of rows : 40
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 2MASS J01444917-1005311 Pe* 01 44 49.1788567320 -10 05 31.157119500           F5 3 0
2 TYC 4316-958-1 * 02 45 20.8211812032 +71 02 02.583047472   12.74 11.64     ~ 4 0
3 TYC 4321-350-1 * 03 01 33.7707971496 +71 59 11.116635684   11.52 10.45     ~ 3 0
4 SDSS J030437.40+382346.0 HB? 03 04 37.4088443136 +38 23 46.100182596           K1 6 0
5 SDSS J035243.58-054003.3 * 03 52 43.5882652224 -05 40 03.316310868           G0 1 0
6 SDSS J051523.17+155855.3 HB? 05 15 23.1767322888 +15 58 55.390499040           K1 3 0
7 TYC 122-550-1 * 05 35 43.7624139936 +05 14 23.013391668   13.15 12.20     ~ 2 0
8 SDSS J063230.90+260437.4 HB? 06 32 30.9035065752 +26 04 37.468153992           G5 3 0
9 TYC 2946-405-1 * 06 52 37.8081778080 +40 52 01.575458436   12.01 11.06     ~ 6 0
10 GSC 02950-01010 * 06 54 58.3721841912 +42 00 27.000019404   13.51 12.57 12.34   ~ 3 0
11 SDSS J072042.79+303651.4 HB? 07 20 42.7900657680 +30 36 51.502979484           F9 4 0
12 2MASS J08083433-0815474 RG* 08 08 34.3305806640 -08 15 47.271434040           K1 3 0
13 GSC 03797-00204 * 08 31 55.2901603680 +54 02 45.402054972   15.1       G0 5 0
14 SDSS J093627.44+293535.7 HB? 09 36 27.4405110456 +29 35 35.785800600           F2 5 0
15 2MASS J11053691+2850080 RG* 11 05 36.9132710112 +28 50 08.091718836           F9 4 0
16 SDSS J121353.32-014714.9 HB? 12 13 53.3253982776 -01 47 14.925913512           F5 2 0
17 2MASS J12145489+5027013 RG* 12 14 54.8959116864 +50 27 00.970368192           F9 4 0
18 SDSS J122712.72-002658.7 HB* 12 27 12.7226625120 -00 26 58.788364200           F9 4 0
19 GSC 04958-01069 RG* 13 10 37.2232342032 -00 12 44.362965348   15.74 14.68 14.76   F9 7 0
20 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
21 SDSS J142128.27+013628.3 * 14 21 28.2749404944 +01 36 28.340462304           K3 3 0
22 SDSS J143207.14+081406.1 * 14 32 07.1510917896 +08 14 06.165304044           G2 4 0
23 2MASS J15221187+0655551 RG* 15 22 11.8697289264 +06 55 55.260351912           F5 3 0
24 2MASS J16070923+0447126 RG* 16 07 09.2312149584 +04 47 12.736253256           F2 6 0
25 SDSS J172504.06+072945.0 * 17 25 04.0675140984 +07 29 45.050589672           F9 2 0
26 SDSS J182422.51+791124.5 HB? 18 24 22.5178432392 +79 11 24.488937564           ~ 2 0
27 2MASS J18495259+1931042 LM* 18 49 52.5878256360 +19 31 04.268777628           M0V 3 0
28 2MASS J19014964+3808511 RG* 19 01 49.6404270816 +38 08 51.241316136           K4III 12 0
29 2MASS J19092925+3837463 RG* 19 09 29.2535953608 +38 37 46.176791016           K5 3 0
30 2MASS J20193244+6012462 RG* 20 19 32.4383697576 +60 12 46.295864316           K3 3 0
31 SDSS J202125.74+125751.3 * 20 21 25.7376113424 +12 57 51.370963344           F9 1 0
32 SDSS J204846.83+560353.9 HB? 20 48 46.8239501808 +56 03 53.636327424           G5 2 0
33 GSC 05773-00305 * 21 19 47.6618138016 -07 34 26.882133384   15.5       F5 2 0
34 2MASS J22005122+4559403 RG* 22 00 51.2224868592 +45 59 40.351562772           M0e 4 0
35 SDSS J220619.74+453157.1 * 22 06 19.7648890320 +45 31 57.149706360           K5 2 0
36 GSC 04009-01967 * 23 53 29.7602050752 +57 28 18.474791412   13.78 12.47 12.03   ~ 3 0
37 NGC 7789 301 RG* 23 56 52.2278331240 +56 33 38.840428440   13.61 12.2728   10.734 ~ 26 0
38 NGC 7789 OpC 23 57 19.4 +56 43 28   7.68 6.7     ~ 575 0
39 NAME Local Group GrG ~ ~           ~ 9325 0
40 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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