J/PASP/120/1 HST WFPC2 star clusters in M31. II. (Krienke+, 2008)
A Hubble Space Telescope Survey of the Disk Cluster Population of M31.
II. Advanced Camera for Surveys Pointings.
Krienke O.K., Hodge P.W.
<Publ. Astron. Soc. Pac. 120, 1 (2008)>
=2008PASP..120....1K 2008PASP..120....1K
ADC_Keywords: Galaxies, nearby ; Associations, stellar ; Photometry
Abstract:
This paper reports on a survey of star clusters in M31 based on
archival images from the Hubble Space Telescope. Paper I reported
results from images obtained with the Wide Field Planetary Camera 2
(WFPC2) and this paper reports results from the Advanced Camera for
Surveys (ACS). The ACS survey has yielded a total of 339 star
clusters, 52 of which mostly globular clusters were found to have been
catalogued previously. As for the previous survey, the luminosity
function of the clusters drops steeply for absolute magnitudes fainter
than MV=-3; the implied cluster mass function has a turnover for
masses less than a few hundred solar masses. The color-integrated
magnitude diagram of clusters shows three significant features: (1) a
group of very red, luminous objects: the globular clusters, (2) a wide
range in color for the fainter clusters, representing a considerable
range in age and reddening, and (3) a maximum density of clusters
centered approximately at V=21, B-V=0.30, V-I=0.50, where there are
intermediate-age, intermediate-mass clusters with ages close to 500
million years and masses of about 2000 solar masses. We give a brief
qualitative interpretation of the distribution of clusters in the CMDs
in terms of their formation and destruction rates.
Description:
For this survey we chose 27 pointings from the list (as of 2007
January 1) of ACS exposures included in the HST archives.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 72 287 New star clusters in M31
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See also:
J/AcA/48/455 : Globular Clusters in M31 and M33 (Mochejska+, 1998)
J/AJ/119/727 : M31 globular clusters photometry (Barmby+, 2000)
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/ApJ/559/851 : Young star cluster candidates in M31 (Williams+, 2001)
J/A+A/449/143 : Photometry of M31 globular cluster candidates (Ma+, 2006)
J/A+A/456/985 : Radial velocities of 76 M31 candidate clusters (Galleti+, 2006)
J/PASP/119/7 : HST WFPC2 star clusters in M31 (Krienke+, 2007)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [KHM31-]
7- 9 I3 --- KHM31 [284/571] KHM31 designation (KHM31 NNN in Simbad)
11- 18 F8.5 deg RAdeg Right ascension in decimal degrees (J2000.0)
20- 27 F8.5 deg DEdeg Declination in decimal degrees (J2000.0)
29- 33 F5.2 mag Vmag V magnitude
35- 38 F4.2 mag e_Vmag rms uncertainty on Vmag
40- 44 F5.2 mag Bmag ? B magnitude
46- 49 F4.2 mag e_Bmag ? rms uncertainty on Bmag
51- 55 F5.2 mag B-V ? B-V colour index
57- 61 F5.2 mag Imag ? I magnitude
63- 66 F4.2 mag e_Imag ? rms uncertainty on Imag
68- 72 F5.2 mag V-I ? V-I colour index
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Feb-2008