2000MNRAS.318.1249B


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST18:47:25

2000MNRAS.318.1249B - Mon. Not. R. Astron. Soc., 318, 1249-1263 (2000/November-2)

Ages and metallicities of globular clusters in NGC 4472.

BEASLEY M.A., SHARPLES R.M., BRIDGES T.J., HANES D.A., ZEPF S.E., ASHMAN K.M. and GEISLER D.

Abstract (from CDS):

We have derived ages and metallicities from co-added spectra of 131 globular clusters associated with the giant elliptical galaxy NGC 4472. Based upon a calibration with Galactic globular clusters, we find that our sample of globular clusters in NGC 4472 span a metallicity range of approximately -1.6≤[Fe/H]≤0dex. There is evidence of a radial metallicity gradient in the globular cluster system which is steeper than that seen in the underlying starlight. Determination of the absolute ages of the globular clusters is uncertain, but formally, the metal-poor population of globular clusters has an age of 14.5±4Gyr and the metal-rich population is 13.8±6Gyr old. Monte Carlo simulations indicate that the globular cluster populations present in these data are older than 6Gyr at the 95per cent confidence level. We find that within the uncertainties, the globular clusters are old and coeval, implying that the bimodality seen in the broadband colours primarily reflects metallicity and not age differences.

Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: individual: NGC 4472 - galaxies: star clusters

Simbad objects: 17

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Number of rows : 17

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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11049 1
2 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1463 1
3 HD 90861 * 10 29 53.6916938188 +28 34 52.393943111   8.01 6.90     K2III 48 0
4 HD 102494 * 11 47 56.3624507640 +27 20 26.158636470   8.35 7.47     G9IV 37 0
5 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1971 2
6 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6282 3
7 HD 112299 PM* 12 55 28.2684801089 +25 44 17.046230857   8.92 8.38     F8V 40 0
8 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2277 0
9 HD 132737 PM* 14 59 52.3925690200 +27 09 37.036465465   8.65 7.63     K0III 47 0
10 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2016 0
11 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1916 0
12 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 321 1
13 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 538 0
14 HD 171232 * 18 32 35.9370527761 +25 29 22.095932484 8.950 8.330 7.430     G8III 32 0
15 NGC 7006 GlC 21 01 29.465 +16 11 16.49     10.46     ~ 486 0
16 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2922 0
17 HD 208906 PM* 21 58 40.8319509283 +29 48 45.457435407 7.35 7.47 6.96 6.53 6.22 G0VmF2 160 0

    Equat.    Gal    SGal    Ecl

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2020.10.19-18:47:25

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