J/ApJ/725/200 An updated catalog of M31 globular-like clusters (Fan+, 2010)
An updated catalog of M31 globular-like clusters: UBVRI photometry, ages, and
masses.
Fan Z., De Grijs R., Zhou X.
<Astrophys. J., 725, 200-213 (2010)>
=2010ApJ...725..200F 2010ApJ...725..200F
ADC_Keywords: Clusters, globular ; Abundances, [Fe/H] ; Galaxies, nearby ;
Photometry, UBVRI
Keywords: catalogs - galaxies: individual (M31) -
galaxies: star clusters: general - globular clusters: general
Abstract:
We present an updated UBVRI photometric catalog containing 970 objects
in the field of M31, selected from the Revised Bologna Catalog (RBC
v.4.0), including 965, 967, 965, 953, and 827 sources in the
individual UBVRI bands, respectively, of which 205, 123, 14, 126, and
109 objects do not have previously published photometry. Photometry is
performed using archival images from the Local Group Galaxies Survey,
which covers 2.2deg2 along the major axis of M31. Detailed
comparisons show that our photometry is fully consistent with previous
measurements in all filters. We focus on 445 confirmed "globular-like"
clusters and candidates, comprising typical globular and young massive
clusters. The ages and masses of these objects are derived by
comparing their observed spectral-energy distributions with simple
stellar population synthesis. Approximately half of the clusters are
younger than 2Gyr, suggesting that there has been significant recent
active star formation in M31, which is consistent with previous
results.
Description:
In this paper, we first perform aperture photometry of 970 RBC objects
based on images from the LGGS (Local Group Galaxies Survey; Massey et
al. 2006, Cat. J/AJ/131/2478). Using photometry in the UBVRI bands and
JHK magnitudes from the RBC (see Galleti et al., Cat. J/A+A/416/917
and J/A+A/508/1285), the ages and masses of the confirmed clusters in
our sample are estimated by comparing the observed SEDs with Bruzual &
Charlot (2003MNRAS.344.1000B 2003MNRAS.344.1000B) SSP synthesis models.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 79 970 New UBVRI photometry of M31 globular-like clusters
table5.dat 58 445 Ages and masses of M31 globular-like clusters
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See also:
J/ApJS/199/37 : GALEX catalog of star clusters in M31 (Kang+, 2012)
J/AJ/139/1438 : SED and age estimates of 104 M31 GCs (Wang+, 2010)
J/MNRAS/402/803 : M31 globular cluster system (Peacock+, 2010)
J/A+A/508/1285 : Metallicity estimates of M31 GCs (Galleti+, 2009)
J/A+A/507/1375 : HST/ACS VI data of M31 globular clusters (Perina+, 2009)
J/AJ/138/1667 : HST survey of young clusters in M31. III. (Barmby+, 2009)
J/AJ/137/94 : Star clusters in M31 (Caldwell+, 2009)
J/MNRAS/392/L55 : GCs in M31 from K-band photometry (Peacock+, 2009)
J/ApJS/177/174 : Star clusters in M31 (Narbutis+, 2008)
J/A+A/483/769 : HST VI photometry of 3 GCs in M31 (Fuentes-Carrera+, 2008)
J/A+A/471/127 : New globular clusters in M31 (Galleti+, 2007)
J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)
J/A+A/449/143 : Photometry of M31 globular cluster candidates (Ma+, 2006)
J/A+A/416/917 : Revised Bologna Catalog of M31 GCs (Galleti+, 2004)
J/AJ/123/2490 : RV and [Fe/H] of M31 globular cluster system (Perrett+, 2002)
J/AJ/122/2458 : M31 globular clusters from HST (Barmby+, 2001)
J/AJ/119/727 : M31 globular clusters photometry (Barmby+, 2000)
J/AJ/114/1488 : Globulars in M31 (Holland+ 1997)
http://www.bo.astro.it/M31/ : RBC v.4 online data
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- ID Object identification
11- 16 F6.3 mag Umag ? The U band magnitude
18- 22 F5.3 mag e_Umag ? Uncertainty in Umag
24- 29 F6.3 mag Bmag ? The B band magnitude
31- 35 F5.3 mag e_Bmag ? Uncertainty in Bmag
37- 42 F6.3 mag Vmag ? The V band magnitude
44- 48 F5.3 mag e_Vmag ? Uncertainty in Vmag
50- 55 F6.3 mag Rmag ? The R band magnitude
57- 61 F5.3 mag e_Rmag ? Uncertainty in Rmag
63- 68 F6.3 mag Imag ? The I band magnitude
70- 74 F5.3 mag e_Imag ? Uncertainty in Imag
76- 79 F4.2 arcsec Ap Aperture size
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- ID Object identification
8- 13 F6.3 Gyr Age Cluster age
15- 19 F5.3 Gyr e_Age Uncertainty in Age
21- 25 F5.3 [Msun] logM ? Log of cluster mass (1)
27- 31 F5.3 [Msun] e_logM ? Uncertainty in logM (1)
33- 38 F6.3 [Sun] [Fe/H] Cluster metallicity
40- 44 F5.3 [Sun] e_[Fe/H] Uncertainty in [Fe/H]
46- 50 F5.3 mag E(B-V) The (B-V) color excess
52- 56 F5.3 mag e_E(B-V) Uncertainty in E(B-V)
58 A1 --- f_E(B-V) [a] a: reddening obtained from free fits (2)
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Note (1): Blank values indicate NaN masses.
Note (2): Reddening obtained from free fits and not available from
Fan et al. (2008MNRAS.385.1973F 2008MNRAS.385.1973F) or Barmby et al. (2000,
Cat. J/AJ/119/727).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Aug-2012