2000A&A...363..526P


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.19CEST02:53:41

2000A&A...363..526P - Astronomy and Astrophysics, volume 363, 526-536 (2000/11-2)

The Old Halo metallicity gradient: the trace of a self-enrichment process.

PARMENTIER G., JEHIN E., MAGAIN P., NOELS A. and THOUL A.A.

Abstract (from CDS):

Based on a model of globular cluster self-enrichment published in a previous paper, we present an explanation for the metallicity gradient observed throughout the galactic Old Halo. Our self-enrichment model is based on the ability of globular cluster progenitor clouds to retain the ejecta of a first generation of Type II Supernovae. The key point is that this ability depends on the pressure exerted on the progenitor cloud by the surrounding protogalactic medium and therefore on the location of the cloud in the protoGalaxy. Since there is no significant (if any) metallicity gradient in the whole halo, we also present a review in favour of a galactic halo partly built via accretions and mergers of satellite systems. Some of them bear their own globular clusters and therefore ``contaminate'' the system of globular clusters formed ``in situ'', namely within the original potential well of the Galaxy. Therefore, the comparison between our self-enrichment model and the observational data should be limited to the genuine galactic globular clusters, the so-called Old Halo group.

Abstract Copyright:

Journal keyword(s): Galaxy: evolution - Galaxy: formation - Galaxy: globular clusters: general - Galaxy: halo

Simbad objects: 30

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Number of rows : 30

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 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 955 0
2 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 977 0
3 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 448 0
4 NAME CL ERID 1 GlC 04 24 44.5 -21 11 13           ~ 162 1
5 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1283 0
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15432 1
7 NAME Hodge 11 GlC 06 14 22.92 -69 50 54.9   12.57 11.93     ~ 102 0
8 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 848 0
9 NAME PYX GLOBULAR CL GlC 09 07 57.80 -37 13 17.0           ~ 86 0
10 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1294 0
11 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 299 1
12 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 763 0
13 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 325 1
14 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6430 3
15 C 1235-509 GlC 12 38 40.20 -51 09 01.0           ~ 334 0
16 M 68 GlC 12 39 27.98 -26 44 38.6   10.26 7.96     ~ 910 0
17 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2321 0
18 IC 4499 GlC 15 00 18.57 -82 12 49.6     8.56     ~ 320 0
19 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 653 1
20 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1824 0
21 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 336 0
22 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2057 0
23 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1950 0
24 NGC 6522 GlC 18 03 34.08 -30 02 02.3   10.68 9.48     ~ 477 1
25 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1852 2
26 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 951 0
27 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 378 0
28 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 315 0
29 Cl Terzan 8 GlC 19 41 44.41 -33 59 58.1     11.54     ~ 274 0
30 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 467 0

    Equat.    Gal    SGal    Ecl

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2021.06.19-02:53:41

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