2009A&A...508..289G


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET20:31:44

2009A&A...508..289G - Astronomy and Astrophysics, volume 508, 289-295 (2009/12-2)

Li-rich red giant branch stars in the Galactic Bulge.

GONZALEZ O.A., ZOCCALI M., MONACO L., HILL V., CASSISI S., MINNITI D., RENZINI A., BARBUY B., ORTOLANI S. and GOMEZ A.

Abstract (from CDS):

We present lithium abundance determination for a sample of K giant stars in the Galactic bulge. The stars presented here are the only 13 stars with a detectable lithium line (6767.18Å) among ∼400 stars for which we have spectra in this wavelength range, half of them in Baade's Window (b=-4°) and half in a field at b=-6°. The stars were observed with the GIRAFFE spectrograph of FLAMES mounted on VLT, with a spectral resolution of R∼20000. Abundances were derived from spectral synthesis and the results are compared with those of stars with similar parameters, but no detectable Li line. We find 13 stars with a detectable Li line, among which 2 have abundances A(Li)>2.7. No clear correlations were found between the Li abundance and those of other elements. With the exception of the two most Li rich stars, the others follow a fairly tight A(Li)-Teff correlation. There is strong indication of a Li production phase during the red giant branch (RGB), acting either on a very short timescale, or selectively only in some stars. That the proposed Li production phase is associated with the RGB bump cannot be excluded, although our targets are significantly brighter than the predicted RGB bump magnitude for a population at 8kpc.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: late-type - Galaxy: bulge

CDS comments: In reflist, Monaco 2008, MmSAI, 79, 1 is a misprint for Monaco 2008MmSAI..79..524M.

Simbad objects: 21

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Number of rows : 21

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Sgr Stream St* 02 22 +00.0           ~ 683 0
2 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2088 0
3 * mu. Leo PM* 09 52 45.8165435 +26 00 25.031882 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 411 0
4 2MASS J13415502+2819149 RG* 13 41 55.0320949688 +28 19 14.932745077   14.53 13.18     ~ 52 0
5 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2298 0
6 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2166 0
7 GAL 000.0+00.0 gam 17 45 39.60213 -29 00 22.0000           ~ 12014 0
8 NAME Baade Window reg 18 03.5 -30 01           ~ 549 3
9 UCAC4 300-175366 * 18 03 51.8484916175 -30 06 28.431729445     16.42 15.39 14.430 K 12 0
10 UCAC4 301-181567 * 18 04 03.9687252544 -29 59 22.376504667     16.60 15.84 14.345 ~ 4 0
11 OGLE BUL-SC45 564768 Lev 18 04 05.9139203495 -29 59 53.642751194     16.59   14.404 ~ 3 0
12 OGLE BUL-SC45 82831 Lev 18 04 18.8620329110 -30 00 36.301631053     16.19   14.517 ~ 3 0
13 OGLE BUL-SC45 205356 Lev 18 04 24.2021157098 -30 10 35.830614221     16.36   14.660 ~ 3 0
14 OGLE BUL-SC45 231128 * 18 04 31.5269626704 -29 59 52.240634002     16.55   14.212 ~ 3 0
15 OGLE BUL-SC45 108191 Lev 18 09 45.5552380654 -31 45 44.616360917     15.90   14.446 ~ 4 0
16 OGLE BUL-SC45 77419 Lev 18 10 04.1545131026 -31 50 10.995492485     16.05   14.435 ~ 4 0
17 OGLE BUL-SC45 75601 Lev 18 10 09.1695488494 -31 50 26.337928291     16.03   14.139 ~ 4 0
18 OGLE BUL-SC45 69986 Lev 18 10 28.5703096386 -31 34 46.199850412     16.19   14.409 ~ 4 0
19 OGLE BUL-SC45 139560 Lev 18 10 45.1528531344 -31 41 57.972238887     16.42   14.380 ~ 4 0
20 NGC 7789 OpC 23 57 24 +56 42.5   7.68 6.7     ~ 462 0
21 NAME Galactic Bulge reg ~ ~           ~ 3536 0

    Equat.    Gal    SGal    Ecl

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