J/ApJ/690/512 LMXBs and globulars in early-type galaxies. II. (Humphrey, 2009)
Low-mass X-ray binaries and globular clusters in early-type galaxies. II. Globular cluster candidates and their mass-metallicity relation. Humphrey P.J. <Astrophys. J., 690, 512-525 (2009)> =2009ApJ...690..512H
ADC_Keywords: Photometry, HST ; Galaxies, optical ; Clusters, globular Keywords: galaxies: distances and redshifts - galaxies: elliptical and lenticular, cD - galaxies: general - galaxies: star clusters Abstract: We present an astrometry and photometry catalogue of globular cluster (GC) candidates detected with the Hubble Space Telescope Wide Field Planetary Camera 2 in a sample of 19 early-type galaxies, appropriate for comparison with the low-mass X-ray binary populations observed with Chandra. In a companion paper (Cat. J/ApJ/689/983), we present the Chandra data and investigate the relation between these populations. We demonstrate that, although there is little evidence of a color-magnitude correlation for the GCs, after estimating mass and metallicity from the photometry under the assumption of a single-age simple stellar population, there is a significant positive correlation between mass and metallicity. Description: The GC populations in 19 early-type galaxies was observed with the Hubble Space Telescope (HST) Wide Field Planetary Camera 2 (WFPC2), between 1994 and 1997, except for NGC 4472 which was observed in 2001 April. Table 1 lists the galaxies and the details of the archival observations. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 87 19 Target galaxies list and observation log table5.dat 105 3754 Catalog of globular cluster (GC) candidates
See also: B/hst : HST Archived Exposures Catalog (STScI, 2007) VII/176 : Photometry and Spectroscopy of Elliptical Galaxies (Faber+ 1989) J/ApJ/586/814 : NGC 4472 Chandra/HST study (Maccarone+, 2003) J/A+A/455/453 : Globular Cluster System of NGC5846 (Chies-Santos+, 2006) J/ApJ/671/1624 : NGC 1533 globular cluster candidates (Degraaff+, 2007) J/ApJ/689/983 : LMXBs in early-type galaxies. I. Chandra (Humphrey+, 2008) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Target name (NGC number) 10- 17 A8 --- Type NED morphological type 19- 22 F4.1 Mpc Dist Distance (1) 24- 27 F4.2 10+11Lsun LKs 2MASS Ks-band luminosity (2) 29- 33 A5 --- FiltB HST filter for B-band 35- 40 A6 --- OIDB B-band HST dataset identifier 42- 45 I4 s ExpB ? B-band exposure time 47- 51 A5 --- FiltV HST filter for V-band 53- 58 A6 --- OIDV V-band HST dataset identifier 60- 63 I4 s ExpV ? V-band exposure time 65- 69 A5 --- FiltI HST filter for I-band 71- 76 A6 --- OIDI I-band HST dataset identifier 78- 81 I4 s ExpI ? I-band exposure time 83- 87 F5.2 arcsec Rmin Approximate semi-major axis of the central, excluded region
Note (1): Taken from Tonry et al. (2001ApJ...546..681T), corrected by -0.16mag to account for revisions to the Cepheid zero-point (e.g., Jensen et al. 2003ApJ...583..712J), except that of NGC 5018, which was taken from Faber et al. (1989, Cat. VII/176). Note (2): Total, extrapolated Ks-band luminosities (LKs) were taken from the Two Micron All Sky Survey (2MASS; Jarrett, 2000PASP..112.1008J), adopting MK☉=3.41. The zero-point was chosen for consistency with the stellar population models of Maraston (2005MNRAS.362..799M; Section 3.2) and assuming the K-band and Ks-band magnitudes do not differ significantly (e.g., Carpenter, 2001AJ....121.2851C).
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Galaxy name (NGC number) 10- 12 I3 --- Seq Globular cluster candidate number (<[H2009] NGC NNNN NNN> in Simbad) 14- 15 I2 h RAh Hour of Right Ascension (J2000) 17- 18 I2 min RAm Minute of Right Ascension (J2000) 20- 24 F5.2 s RAs Second of Right Ascension (J2000) 26 A1 --- DE- Sign of the Declination (J2000) 27- 28 I2 deg DEd Degree of Declination (J2000) 30- 31 I2 arcmin DEm Arcminute of Declination (J2000) 33- 36 F4.1 arcsec DEs Arcsecond of Declination (J2000) 38- 43 F6.3 mag Vmag HST V band magnitude (F555W, F606W or F547W) 45- 49 F5.3 mag e_Vmag Uncertainty in Vmag 51- 56 F6.3 mag Imag ? HST I band magnitude (F814W or F791W) 58- 62 F5.3 mag e_Imag ? Uncertainty in Imag 64- 70 F7.4 MMsun Mass ? Mass 72- 76 F5.3 MMsun E_Mass ? Upper uncertainty value on Mass 78- 82 F5.3 MMsun e_Mass ? Lower uncertainty value on Mass (1) 85- 92 F8.5 [Sun] [Z/H] ? Metallicity 95- 99 F5.3 [Sun] E_[Z/H] ? Upper uncertainty value on [Z/H] 101-105 F5.3 [Sun] e_[Z/H] ? Lower uncertainty value on [Z/H] (1)
Note (1): Or just the uncertainty on Mass or [Z/H] if the previous column is blank.
History: From electronic version of the journal References: Humphrey et al. Paper I. 2008ApJ...689..983H Cat. J/ApJ/689/983
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 24-Jan-2011
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