2001A&A...373..905T


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.19CEST05:32:12

2001A&A...373..905T - Astronomy and Astrophysics, volume 373, 905-915 (2001/7-3)

VLT observations of turnoff stars in the globular cluster NGC 6397.

THEVENIN F., CHARBONNEL C., DE FREITAS PACHECO J.A., IDIART T.P., JASNIEWICZ G., DE LAVERNY P. and PLEZ B.

Abstract (from CDS):

VLT-UVES high resolution spectra of seven turnoff stars in the metal-poor globular cluster NGC 6397 have been obtained. Atmospheric parameters and abundances of several elements (Li, Na, Mg, Ca, Sc, Ti, Cr, Fe, Ni, Zn and Ba) were derived. The mean iron abundance is [Fe/H] = -2.02, with no star-to-star variation. The mean abundances of the alpha-elements (Ca, Ti) and of the iron-peak elements (Sc, Cr, Ni) are consistent with abundances derived for field stars of similar metallicity. Magnesium is also almost solar, consistent with the values found by Idiart & Thevenin (2000) when non-LTE effects (NLTE hereafter) are taken into account. The sodium abundance derived for five stars is essentially solar, but one object (A447) is clearly Na deficient. These results are compatible with the expected abundance range estimated from the stochastic evolutionary halo model of Argast et al. (2000), in which at the epoch of [Fe/H]~-2 the interstellar medium is supposed to become well-mixed.

Abstract Copyright:

Journal keyword(s): stars: abundances - Galaxy: globular clusters: individual: NGC 6397 - Galaxy: abundances

CDS comments: Table 1: 'ANNNN' = Cl* NGC 6397 ALA NNNN in the ref list Cottrell 1981A pJ...245L..79C instead of 245.79

Simbad objects: 19

goto Full paper

goto View the reference in ADS

Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3567 0
2 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3020 0
3 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2272 0
4 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1780 0
5 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1682 0
6 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2014 0
7 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 688 0
8 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1912 0
9 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1806 1
10 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1815 0
11 NGC 7006 GlC 21 01 29.465 +16 11 16.49     10.46     ~ 486 0
12 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2917 0
13 Cl* NGC 6397 ALA 1406 * ~ ~   16.705 16.145     ~ 4 0
14 Cl* NGC 6397 ALA 721 * ~ ~   16.752 16.203     ~ 2 0
15 Cl* NGC 6397 ALA 575 * ~ ~   16.740 16.167     ~ 2 0
16 Cl* NGC 6397 ALA 228 * ~ ~   16.635 16.068     ~ 6 0
17 Cl* NGC 6397 ALA 447 * ~ ~   16.769 16.185     ~ 2 0
18 Cl* NGC 6397 ALA 2111 * ~ ~   16.609 16.011     ~ 5 0
19 Cl* NGC 6397 ALA 2084 * ~ ~   16.740 16.198     ~ 3 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001A&A...373..905T and select 'bookmark this link' or equivalent in the popup menu


2020.09.19-05:32:12

© Université de Strasbourg/CNRS

    • Contact