J/A+A/508/1285 Metallicity estimates of M31 globular clusters (Galleti+, 2009)
An updated survey of globular clusters in M 31.
III. A spectroscopic metallicity scale for the revised Bologna catalog.
Galleti S., Bellazzini M., Buzzoni A., Federici L., Fusi Pecci F.
<Astron. Astrophys., 508, 1285-1299 (2009)>
=2009A&A...508.1285G 2009A&A...508.1285G
ADC_Keywords: Galaxies, nearby ; Clusters, globular ; Abundances
Keywords: galaxies: individual: M 31 - galaxies: star clusters - catalogs -
Local Group
Abstract:
We present a new homogeneous set of metallicity estimates based on
Lick indices for the old globular clusters of the M31 galaxy. The
final aim is to add homogeneous spectroscopic metallicities to as
many entries as possible of the Revised Bologna Catalog of M31
(www.bo.astro.it/M31) clusters, by reporting Lick index measurements
from any source (literature, new observations, etc.) on the same
scale.
Description:
New empirical relations of [Fe/H] as a function of [MgFe] and Mg2
indices are based on the well-studied galactic globular clusters,
complemented with theoretical model predictions for -0.2≤[Fe/H]≤+0.5.
Lick indices for M31 clusters from various literature sources (225
clusters) and from new observations by our team (71 clusters) have
been transformed into the Trager et al. (2000AJ....119.1645T 2000AJ....119.1645T) system,
yielding new metallicity estimates for 245 globular clusters of M31.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 88 88 Lick indices for M31 globular clusters from
new observations (Sect. 3.1)
tablea2.dat 88 296 Lick indices for M31 globular clusters taken
from literature sources and reported into the
Trager et al. (1998, Cat. J/ApJS/116/1)
system (T98, Sect. 3.2)
tablea3.dat 18 245 Metallicities for M31 globular clusters
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See also:
J/A+A/416/917 : M31 globular clusters revised Bologna Catalog (Galleti+, 2004)
J/A+A/456/985 : Radial velocities of 76 M31 candidate clusters (Galleti+, 2006)
J/A+A/471/127 : New globular clusters in M31 (Galleti+, 2007)
Byte-by-byte Description of file: tablea[12].dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Cluster Cluster name
7 A1 --- f_Cluster [*] Non-cluster (1)
9- 13 F5.3 mag Mg2 Mg2 metallicity index
15- 19 F5.3 mag e_Mg2 rms uncertainty on Mg2
21- 26 F6.3 0.1nm Mgb Mgb metallicity index
28- 32 F5.3 0.1nm e_Mgb rms uncertainty on Mgb
34- 39 F6.3 0.1nm Fe5270 Fe5270 metallicity index
41- 45 F5.3 0.1nm e_Fe5270 rms uncertainty on Fe5270
47- 52 F6.3 0.1nm Fe5335 ?=99.999 Fe5335 metallicity index
54- 59 F6.3 0.1nm e_Fe5335 ?=99.999 rms uncertainty on Fe5335
61- 66 F6.3 0.1nm Fe5406 ?=99.999 Fe5406 metallicity index
68- 73 F6.3 0.1nm e_Fe5406 ?=99.999 rms uncertainty on Fe5406
75- 79 F5.2 0.1nm Hbeta ?=99.999 Hβ index
81- 84 F4.2 0.1nm e_Hbeta ?=9.99 rms uncertainty on Hbeta
86 I1 --- y [0/7] BLCC (blue luminous compact clusters)
code (2)
88 I1 --- Set [0/7] Origin of the data (3)
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Note (1): *: Clusters are classified by Caldwell et al. (2009AJ....137...94C 2009AJ....137...94C)
as non-clusters and in the following analysis are not considered
Note (2): BLCC (young cluster) from Fusi Pessi et al. (2005AJ....130..554F 2005AJ....130..554F)
code as follows:
0 = old cluster
1 = color selected
2 = Hβ selected
3 = color and Hβ selected
4 = reportedly young objects by other authors and
5 = unconfirmed GCs and reportedly young and/or possible
candidates BLCC with (B-V)0<0.45
7 = classified young by Caldwell et al. (2009AJ....137...94C 2009AJ....137...94C)
Note (3): Dataset code as follows:
0 = Trager et al. (1998, Cat. J/ApJS/116/1)
1 = Puzia et al . (2005A&A...434..909P 2005A&A...434..909P)
2 = Beasley et al. (2004AJ....128.1623B 2004AJ....128.1623B)
3 = WHT data (AF2/WYFFOS multi-fiber spectrograph at the 4.2m
William Herschel telescope)
4 = Perrett et al. (2002, Cat. J/AJ/123/2490)
5 = Huchra et al. (1991ApJ...370..495H 1991ApJ...370..495H)
6 = TNG data (DoLoRes spectrograph at 3.5m Telescopio Nazionale
Galileo at La Palma)
7 = LOI data (BFOSC at Cassini 1.52m telescope of the Loiano
Observatory, Bologna, Italy)
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Cluster Cluster name
7 A1 --- n_Cluster [*] * for Cluster classified as young by
Caldwell et al. (2009AJ....137...94C 2009AJ....137...94C)
9- 13 F5.2 [-] [Fe/H] Metallicity
15- 18 F4.2 [-] e_[Fe/H] rms uncertainty on [Fe/H]
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History:
From electronic version of the journal
References:
Galleti et al., Paper I 2006A&A...456..985G 2006A&A...456..985G, Cat. J/A+A/456/985
Galleti et al., Paper II 2007A&A...471..127G 2007A&A...471..127G, Cat. J/A+A/471/127
(End) Patricia Vannier [CDS] 20-Apr-2010