J/AJ/135/1567 Bright star clusters in M51 (Hwang+, 2008)
A catalog of bright star clusters in the interacting galaxy M51.
Hwang N., Lee M.G.
<Astron. J., 135, 1567-1579 (2008)>
=2008AJ....135.1567H 2008AJ....135.1567H
ADC_Keywords: Galaxies, nearby ; Associations, stellar ; Photometry, HST ;
Morphology
Keywords: galaxies: evolution - galaxies: individual (M51, NGC 5194, NGC 5195) -
galaxies: interactions - galaxies: spiral - galaxies: star clusters
Abstract:
We present a catalog of star clusters with VF555W<23mag detected in
the interacting spiral galaxy M51 system based on mosaic images taken
with the Hubble Space Telescope Advanced Camera for Surveys by the
Hubble Heritage Team. We have selected about 3600 clusters based on
their morphological information through visual inspection. The final
star cluster catalog includes 2224 clusters that are relatively well
isolated and have a circular shape.
Description:
The data used in this study were obtained by the Hubble Heritage Team
to commemorate the HST's 15th anniversary using the HST Advanced
Camera for Surveys (ACS) with F435W, F555W, F814W, and F658N filters
through HST observing program 10452 (P.I.: Steven V. W. Beckwith). The
observed field is as large as about 6.8'x10.5' centered on NGC 5194.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 111 2224 A catalog of class 1 bright star clusters in M51
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See also:
J/A+A/309/446 : HII Regions in M51 (Petit+, 1996)
J/ApJ/582/170 : M51 Planetary Nebula Candidates (Durrell+, 2003)
J/A+A/397/473 : HST photometry of M51 cluster (Bik+, 2003)
J/ApJ/601/735 : M51 luminous X-ray sources (Terashima+, 2004)
J/ApJ/633/871 : Positions and photometry of HII knots in M51 (Calzetti+, 2005)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- [HL2008] Source ID Number
8- 18 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
20- 29 F10.7 deg DEdeg Declination in decimal degrees (J2000)
31- 36 F6.3 mag Vmag HST/ACS F555W (V-equivalent) magnitude,
with 6 pixel aperture
38- 42 F5.3 mag e_Vmag Error in Vmag
44- 49 F6.3 mag B-V HST-equivalent (B-V) color index (F435W-F555W)
51- 55 F5.3 mag e_B-V Error in B-V
57- 62 F6.3 mag V-I HST-equivalent (V-I) color index (F555W-F814W)
64- 68 F5.3 mag e_V-I Error in V-I
70 I1 --- Flag [0/3] Source extraction flag (1)
72- 75 F4.2 --- S/G [0/1] Stellarity - star/galaxy classifier,
1 (point sources) to 0 (extended sources)
77- 81 F5.3 arcsec FWHM Star cluster's full-width at half-maximum
83- 88 F6.2 pc Reff Star cluster's effective radius
90- 94 F5.3 --- chi2 The (χ2/χ20) calculated by ISHAPE
96-100 F5.3 --- ell SExtractor second-order image moment ellipticity
102-107 F6.3 mag Vmag.c Aperture corrected V band magnitude
109-111 A3 --- Comm Optional comment (2)
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Note (1): Source extraction flag as follows:
0 = star cluster is well isolated
1 = cluster has neighbors
2 = cluster is originally blended with another source but
deblended by SExtractor
3 = cluster has a neighbor and is blended with it but deblended
by SExtractor
Note (2): Comments as follows:
FF = cluster is classified as a faint fuzzy cluster
FFt = not explained in the paper
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 20-Oct-2010