1997A&A...319..394D

Query : 1997A&A...319..394D

1997A&A...319..394D - Astronomy and Astrophysics, volume 319, 394-396 (1997/3-2)

Age and metallicity effects in single stellar populations: application to M 31 clusters.

DE FREITAS PACHECO J.A.

Abstract (from CDS):

We have recently calculated (Borges et al. 1995AJ....110.2408B) integrated metallicity indices for single stellar populations (SSP). Effects of age, metallicity and abundances were taken into account. In particular, the explicit dependence of the indices Mg2 and NaD respectively on the ratios [Mg/Fe] and [Na/Fe] was included in the calibration. We report in this work an application of those models to a sample of 12 globular clusters in M 31. A fitting procedure was used to obtain age, metallicity and the [Mg/Fe] ratio for each object, which best reproduce the data. The mean age of the sample is 15±2.8Gyr and the mean [Mg/Fe] ratio is 0.35±0.10. These values and the derived metallicity spread are comparable to those found in galactic counterparts.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: M 31 - galaxies: abundances - galaxies: star clusters - globular clusters: general

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Mayall II GlC 00 32 46.5323801712 +39 34 40.504803060   14.564 13.807 13.208 12.684 ~ 388 1
2 Bol 12 GlC 00 40 32.4604299648 +41 21 44.200683396 15.990 15.860 15.17 14.620 14.14 ~ 80 0
3 Bol 23 GlC 00 41 01.151 +41 13 45.41 16.040 15.400 14.17 13.560 12.570 ~ 91 0
4 Bol 58 GlC 00 41 53.0027897448 +40 47 09.670417656 15.986 15.776 14.967 14.474 14.03 ~ 78 0
5 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12635 1
6 Bol 158 GlC 00 43 14.3953843272 +41 07 21.141017796 15.900 15.560 14.65 14.150 13.550 ~ 117 1
7 Bol 163 GlC 00 43 17.6311962552 +41 27 44.994405276 16.77 16.030 15.00 14.430 13.87 ~ 78 0
8 Bol 171 GlC 00 43 25.6003962624 +41 15 37.095704604 16.795 16.192 15.217 14.635 14.07 ~ 73 0
9 Bol 179 GlC 00 43 31.1069226792 +41 18 14.612214636 16.449 16.162 15.316 14.800 14.43 ~ 52 0
10 Bol 193 GlC 00 43 45.4998657576 +41 36 57.605146668 16.746 16.097 15.193 14.565 14.18 ~ 88 0
11 Bol 218 GlC 00 44 14.3248282920 +41 19 19.371822456 15.875 15.559 14.682 14.230 13.74 ~ 72 0
12 Bol 225 GlC 00 44 29.5618369896 +41 21 35.714596284 15.50 15.000 14.220 13.679 13.02 ~ 133 0
13 Bol 240 GlC 00 45 25.0383161496 +41 06 22.112717688 16.030 15.930 15.210 14.730 14.210 ~ 79 0

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