2001A&A...369...87G


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST09:17:37

2001A&A...369...87G - Astronomy and Astrophysics, volume 369, 87-98 (2001/4-1)

The O-Na and Mg-Al anticorrelations in turn-off and early subgiants in globular clusters.

GRATTON R.G., BONIFACIO P., BRAGAGLIA A., CARRETTA E., CASTELLANI V., CENTURION M., CHIEFFI A., CLAUDI R., CLEMENTINI G., D'ANTONA F., DESIDERA S., FRANCOIS P., GRUNDAHL F., LUCATELLO S., MOLARO P., PASQUINI L., SNEDEN C., SPITE F. and STRANIERO O.

Abstract (from CDS):

High dispersion spectra (R> 40000) for a quite large number of stars at the main sequence turn-off and at the base of the giant branch in NGC 6397 and NGC 6752 were obtained with the UVES on Kueyen (VLT UT2). The [Fe/H] values we found are -2.03±0.02±0.04 and -1.42±0.02±0.04 for NGC 6397 and NGC 6752 respectively, where the first error bars refer to internal and the second ones to systematic errors (within the abundance scale defined by our analysis of 25 subdwarfs with good Hipparcos parallaxes). In both clusters the [Fe/H]'s obtained for TO-stars agree perfectly (within a few percent) with that obtained for stars at the base of the RGB. The [O/Fe]=0.21±0.05 value we obtain for NGC 6397 is quite low, but it agrees with previous results obtained for giants in this cluster. Moreover, the star-to-star scatter in both O and Fe is very small, indicating that this small mass cluster is chemically very homogenous. On the other hand, our results show clearly and for the first time that the O-Na anticorrelation (up to now seen only for stars on the red giant branches of globular clusters) is present among unevolved stars in the globular cluster NGC 6752, a more massive cluster than NGC 6397. A similar anticorrelation is present also for Mg and Al, and C and N. It is very difficult to explain the observed Na-O, and Mg-Al anticorrelation in NGC 6752 stars by a deep mixing scenario; we think it requires some non internal mechanism.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: evolution - stars: population II - Galaxy: globular clusters

Nomenclature: Table 2: Cl* NGC 6397 GVS NNNNNN N=8 among N>206810. Table 3: Cl* NGC 6752 GVS NNNNNN N=18 among N>202063.

CDS comments: Tables 2, 3: stars are from unpublished list of Grundahl+ see astro-ph 9909447).

Simbad objects: 59

goto Full paper

goto View the reference in ADS

Number of rows : 59

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     ~ 3575 0
2 CD-35 360 PM* 01 04 06.1285487163 -34 40 28.935563742   11.01 10.25     G8 57 0
3 HD 10607 PM* 01 41 14.6904205826 -67 40 37.187012023   8.87 8.32     G0Vm-2.25 80 0
4 HD 29907 SB* 04 38 22.4006754245 -65 24 57.599417729   10.52 9.91     F8V 88 0
5 HD 31128 PM* 04 52 09.9097489102 -27 03 50.940327190   9.55 9.14     F3/5Vw 120 0
6 HD 108177 PM* 12 25 34.9568983381 +01 17 02.259993860 9.87 10.09 9.66 9.21 8.89 F0V 231 0
7 HD 116064 Pe* 13 21 43.7823913103 -39 18 39.998476883   9.26 8.81     F9IV-Vm-5 124 0
8 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3032 0
9 HD 120559 PM* 13 51 40.3897554726 -57 26 08.293465228 8.679 8.647 7.982 7.605 7.217 G7VFe-1.4CH-1 140 0
10 HD 121004 PM* 13 53 58.1163515488 -46 32 19.526169178   10.112 9.522     G2V 128 0
11 HD 126681 PM* 14 27 24.9096361739 -18 24 40.457119166   9.939 9.535     G3V 165 0
12 HD 132475 PM* 14 59 49.7649807130 -22 00 45.814964574 8.98 9.11 8.55     F5/6V 225 1
13 HD 134169 SB* 15 08 18.0562462154 +03 55 50.107808860 8.14 8.22 7.70     F7V 197 0
14 HD 134440 PM* 15 10 12.9678041572 -16 27 46.510775897 10.69 10.217 9.426 8.913 8.441 K2V 257 0
15 HD 134439 PM* 15 10 13.0874231858 -16 22 45.866399625 10.03 9.837 9.066 8.604 8.160 sd:K1Fe-1 301 0
16 HD 140283 Pe* 15 43 03.0967798658 -10 56 00.595803430 7.508 7.711 7.212 6.63 8.21 F9VkA5mA1 862 0
17 HD 145417 PM* 16 13 48.5584718157 -57 34 13.843908786 8.663 8.365 7.540 7.054 6.588 K3VFe-1.7 151 0
18 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2016 0
19 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1916 0
20 HD 159482 PM* 17 34 43.0846515269 +06 00 51.750931202   8.95   8.0   G0V 145 0
21 Cl* NGC 6397 GVS 1543 * 17 39 36.17 -53 40 20.7           ~ 5 0
22 Cl* NGC 6397 GVS 793 HB* 17 39 55.9063512985 -53 35 11.986878206   16.090 15.551   14.56 ~ 8 0
23 Cl* NGC 6397 GVS 1905 * 17 40 01.13 -53 35 56.9           ~ 5 0
24 Cl* NGC 6397 GVS 1622 * 17 40 09.0994543031 -53 43 26.482744384   16.596 16.200   15.622 ~ 6 0
25 Cl* NGC 6397 GVS 201432 * 17 40 16.0803009222 -53 47 18.739606195   16.669 16.278   15.708 ~ 6 0
26 Cl* NGC 6397 GVS 206810 * 17 40 34.5834934535 -53 33 20.865155597   16.058 15.514   14.54 ~ 7 0
27 Cl* NGC 6397 GVS 202765 * 17 40 41.5967069340 -53 45 49.369089552   16.662 16.271   15.701 ~ 6 0
28 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1808 1
29 Cl* NGC 6397 GVS 669 * 17 40 43.7538685371 -53 37 17.520486787   15.899 15.339   14.34 ~ 7 0
30 BD+05 3640 PM* 18 12 21.8775881607 +05 24 04.403971434   11.16   9.9   G8 77 0
31 HD 166913 PM* 18 16 25.6833261555 -59 24 11.241154880   8.66 8.23     F5/7Vw 122 0
32 Cl* NGC 6752 GVS 1481 * 19 10 19.68 -60 01 27.8     15.95     ~ 6 0
33 Cl* NGC 6752 GVS 4661 * 19 10 20.98 -60 01 47.6     17.216     ~ 7 0
34 Cl* NGC 6752 GVS 1406 * 19 10 22.32 -60 03 19.7     15.90     ~ 6 0
35 Cl* NGC 6752 GVS 1460 * 19 10 23.82 -59 59 07.1     15.94     ~ 5 0
36 Cl* NGC 6752 GVS 4341 * 19 10 29.79 -59 57 52.7     17.149     ~ 6 0
37 Cl* NGC 6752 GVS 1400 * 19 10 31.6226567865 -59 59 34.637551293     15.89     ~ 5 0
38 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1817 0
39 Cl* NGC 6752 GVS 202316 * 19 10 59.54 -59 54 00.4           ~ 6 0
40 Cl* NGC 6752 GVS 4428 * 19 10 59.8759168194 -60 02 17.125654492     17.142     ~ 9 0
41 Cl* NGC 6752 GVS 1665 * 19 11 05.0162182946 -59 55 27.386111879     16.08     ~ 7 0
42 Cl* NGC 6752 GVS 1461 * 19 11 05.18 -60 01 51.2     15.95     ~ 6 0
43 Cl* NGC 6752 GVS 1445 * 19 11 05.44 -60 01 45.9     15.89     ~ 5 0
44 Cl* NGC 6752 GVS 202063 * 19 11 05.49 -59 54 28.7           ~ 4 0
45 Cl* NGC 6752 GVS 4383 * 19 11 13.20 -60 02 24.2     17.112     ~ 6 0
46 Cl* NGC 6752 GVS 5048 * 19 11 19.958 -59 59 50.52     16.10     ~ 8 0
47 Cl* NGC 6752 GVS 1563 * 19 11 21.3661049243 -59 59 51.016491759     16.06     ~ 6 0
48 Cl* NGC 6752 GVS 4907 * 19 11 22.87 -60 03 57.6     17.199     ~ 8 0
49 Cl* NGC 6752 GVS 4458 * 19 11 26.26 -60 00 48.7     17.155     ~ 6 0
50 Cl* NGC 6752 GVS 200613 * 19 11 35.7505905495 -59 58 02.022078398           ~ 10 0
51 HD 181743 PM* 19 23 42.7454549059 -45 04 56.915607302   10.13 9.71     F4 99 0
52 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 1028 0
53 HD 188510 PM* 19 55 09.6783577203 +10 44 27.395091177 9.30 9.41   8.5   G5V: 234 0
54 HD 189558 PM* 20 01 00.2452564415 -12 15 20.355884232   8.27 7.72     F8/G2V 171 1
55 HD 193901 PM* 20 23 35.8472360557 -21 22 14.228814044 9.08 9.22 8.67 8.17 7.87 F7V 258 0
56 HD 194598 PM* 20 26 11.9185966774 +09 27 00.429262518 8.62 8.82 8.34 7.90 7.56 F8 287 0
57 HD 202765 * 21 12 03.8856645669 +76 18 36.630781659   6.99 7.11     B9 9 0
58 HD 204155 PM* 21 26 42.9051661431 +05 26 29.899070605   9.03   8.1   F7V 118 0
59 HD 205650 PM* 21 37 26.0309417494 -27 38 06.697112156   9.59 9.00     F6V 95 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001A&A...369...87G and select 'bookmark this link' or equivalent in the popup menu


2020.10.24-09:17:37

© Université de Strasbourg/CNRS

    • Contact