2001AJ....122.1429R

Query : 2001AJ....122.1429R

2001AJ....122.1429R - Astron. J., 122, 1429-1437 (2001/September-0)

Abundances in stars from the red giant branch tip to near the main-sequence turnoff in M71. II. Iron abundance.

RAMIREZ S.V., COHEN J.G., BUSS J. and BRILEY M.M.

Abstract (from CDS):

We present [Fe/H] abundance results that involve a sample of stars with a wide range in luminosity, from luminous giants to stars near the turnoff in a globular cluster. Our sample of 25 stars in M71 includes 10 giant stars more luminous than the RHB, three horizontal branch stars, nine giant stars less luminous than the RHB, and three stars near the turnoff. We analyzed both Fe I and Fe II lines in high-dispersion spectra observed with HIRES at the W. M. Keck Observatory. We find that the [Fe/H] abundances from both Fe I and Fe II lines agree with each other and with earlier determinations. Also the [Fe/H] obtained from Fe I and Fe II lines is constant within the rather small uncertainties for this group of stars over the full range in Teff and luminosity, suggesting that non-LTE effects are negligible in our iron abundance determination. In this globular cluster, there is no difference among the mean [Fe/H] of giant stars located at or above the RHB, RHB stars, giant stars located below the RHB and stars near the turnoff.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Globular Clusters: General - globular clusters: individual (M71) - Stars: Abundances - Stars: Evolution

Simbad objects: 31

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Number of rows : 31
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 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
2 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
3 Cl* NGC 6838 ASC 232 * 19 53 39.0 +18 46 29   17.9 16.86     ~ 4 0
4 [KGS2008] J195339.2+184623 RG* 19 53 39.18 +18 46 23.9   17.48 16.86   16.14 ~ 4 0
5 Cl* NGC 6838 ASC 1060 * 19 53 39.4 +18 46 24     16.95     ~ 3 0
6 NGC 6838 1094 HB* 19 53 40.8815215567 +18 46 01.557605582   15.47 14.51     ~ 10 0
7 2MASS J19534103+1846056 AB* 19 53 41.0341710408 +18 46 05.602037268   14.63 13.39     ~ 39 0
8 2MASS J19534134+1844353 * 19 53 41.3727171192 +18 44 35.448239832     17.97     ~ 3 0
9 NGC 6838 1060 * 19 53 41.6404584120 +18 48 42.495671556   15.58 14.49     ~ 11 0
10 [KGS2008] J195341.7+184431 RG* 19 53 41.72 +18 44 31.2   17.40 16.76   16.01 ~ 4 0
11 NGC 6838 1059 RG* 19 53 41.788 +18 48 38.46   15.93 14.63     ~ 32 0
12 [CBB2001b] 5342.5-4612 * 19 53 42.45 +18 46 11.7     16.32     ~ 3 0
13 [CBB2001b] 5342.5-4608 * 19 53 42.48 +18 46 07.7     15.47     ~ 2 0
14 NGC 6838 1080 * 19 53 44.2192906512 +18 46 48.825622236   15.49 14.50     ~ 6 0
15 [KGS2008] J195344.5+184647 RG* 19 53 44.4 +18 46 48   15.64 14.76   13.78 ~ 7 0
16 Cl* NGC 6838 ASC 10218 * 19 53 44.6 +18 47 03     16.03     ~ 4 0
17 Cl* NGC 6838 KC 263 RG* 19 53 44.68464 +18 47 07.2852   16.20 15.05     ~ 20 0
18 2MASS J19534477+1846349 AB* 19 53 44.7709947960 +18 46 34.989387348   13.99 12.42     ~ 31 0
19 NGC 6838 2160 * 19 53 45.19 +18 48 33.2   16.16 15.03     ~ 6 0
20 NGC 6838 1066 RG* 19 53 45.2532361224 +18 46 55.433986176   13.52 12.27   10.95 ~ 42 0
21 NGC 6838 1081 * 19 53 45.5110375872 +18 46 49.598051952   15.08 13.76     ~ 8 0
22 NGC 6838 1087 HB* 19 53 45.6130770672 +18 45 50.217499512   15.42 14.37     ~ 23 0
23 [CBB2001b] 5345.7-4709 * 19 53 45.69 +18 47 08.8     16.75     ~ 3 0
24 NGC 6838 1064 RG* 19 53 46.1566912560 +18 47 26.146446540   14.634 13.132   11.616 ~ 43 0
25 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
26 [CBB2001b] 5347.5-4547 * 19 53 47.53 +18 45 47.3     16.63     ~ 2 0
27 Cl* NGC 6838 KC 239 RG* 19 53 47.6420786664 +18 45 44.197620084   15.12 14.22   13.23 ~ 9 0
28 2MASS J19534774+1845402 * 19 53 47.74440 +18 45 40.2516     16.33     ~ 5 0
29 NGC 6838 1045 RG* 19 53 48.2738208408 +18 48 02.321225604   14.080 12.346   10.657 ~ 58 0
30 2MASS J19534828+1848253 AB* 19 53 48.2880658344 +18 48 25.408651716   14.62 13.25     ~ 20 0
31 NGC 6838 1001 RG* 19 53 52.3670642088 +18 44 54.189746376   15.309 14.130     ~ 25 0

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