J/AJ/133/1287 JHK photometry of 24 Galactic globular clusters (Valenti+, 2007)
Near-infrared properties of 24 globular clusters in the Galactic Bulge.
Valenti E., Ferraro F.R., Origlia L.
<Astron. J., 133, 1287-1301 (2007)>
=2007AJ....133.1287V 2007AJ....133.1287V
ADC_Keywords: Clusters, globular ; Photometry, infrared
Keywords: Galaxy: bulge - globular clusters: general - infrared: stars -
techniques: photometric
Abstract:
We present near-IR color-magnitude diagrams and physical parameters
for a sample of 24 Galactic globular clusters toward the bulge. In
this paper we discuss the properties of 12 new clusters (out of the
24) in addition to those previously studied and published by our
group. The compilation includes measurements of the cluster reddening,
distance, photometric metallicity, horizontal branch red clump, and
red giant branch morphological (e.g., mean ridgelines) and
evolutionary (e.g., bump and tip) features. The compilation is
available in electronic form on the World Wide Web, and it will be
updated regularly.
Description:
The cluster sample presented in this study contains 24 GCs in the
bulge direction observed in the near-IR by our group in the last few
years.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 144 24 The Bulge Globular Cluster parameters
phot/* . 24 Individual JHK photometry
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See also:
VII/103 : Galactic Globular Clusters (Monella 1985)
VII/151 : Galactic Globular Clusters Structure Parameters (Webbink 1985)
J/A+A/391/945 : HST photometry of 74 galactic globular clusters (Piotto+, 2002)
J/A+A/432/851 : Distance of 72 Galactic globular clusters (Recio-Blanco+, 2005)
J/A+A/450/105 : Properties of 153 Galactic globular clusters (Bica+, 2006)
J/ApJ/590/797 : Parameters of galactic globular clusters (Van Den Bregh+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Cluster name
9- 14 F6.2 deg GLON [-15/21] Galactic longitude
16- 21 F6.2 deg GLAT Galactic latitude
23- 26 F4.1 kpc dsun Heliocentric distance
28- 30 F3.1 kpc RGC Galactocentric radius
32- 35 F4.1 kpc X Distance along X axis (galactic)
37- 40 F4.1 kpc Y Distance along Y axis (galactic)
42- 46 F5.2 kpc Z Distance along Z axis (galactic)
47- 51 F5.2 mag E(B-V) Redenning
53- 57 F5.2 mag (m-M)0 Distance modulus
59- 63 F5.2 [-] [Fe/H] Metallicity (2) (1)
65- 69 F5.2 [-] [M/H] Metal abundance (2)
71- 75 F5.2 mag JRC ?=- HB red clump J magnitude
77- 81 F5.2 mag HRC ?=- HB red clump H magnitude
83- 87 F5.2 mag KRC ?=- HB red clump K magnitude
89- 93 F5.2 mag JBump ?=- RGB Bump J magnitude
95- 99 F5.2 mag HBump ?=- RGB Bump H magnitude
101-105 F5.2 mag KBump ?=- RGB Bump K magnitude
107-111 F5.2 mag JTip Tip J magnitude
113-116 F4.2 mag HTip ?=- Tip H magnitude
118-121 F4.2 mag KTip ?=- Tip K magnitude
123-126 F4.2 10-7W MBolBump ?=- RGB Bump bolometric luminosity (3)
128-132 F5.2 10-7W MBolTip ?=- Tip bolometric luminosity (3)
134-144 A11 --- FileName Name of the file with individual photometry
in subdirectory phot
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Note (1): [Fe/H] is in the Carretta & Gratton (1997, Cat. J/A+AS/121/95) scale
Note (2): For NGC6256, NGC6273, NGC6293, NGC6553 and NGC6401 the
metallicity estimates ([Fe/H] and [M/H]) have been derived
by using the empirical method of Ferraro, Valenti & Origlia
(2006ApJ...649..243F 2006ApJ...649..243F; see also IR relations).
Note (3): The Bolometric magnitudes of the RGB Bump and Tip have been
derived by using the bolometric corrections for Population II giants
computed by Montegriffo et al. (1998MNRAS.297..872M 1998MNRAS.297..872M), and by adopting
the reddening and distance values listed in Table 1 and the extinction
coefficients of Savage & Mathis (1979ARA&A..17...73S 1979ARA&A..17...73S).
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Byte-by-byte Description of file(#): phot/*
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Bytes Format Units Label Explanations
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4- 8 I5 --- Seq Sequential number within the cluster (1)
12- 17 F6.3 mag Jmag ?=0.000 J magnitude
21- 26 F6.3 mag Hmag ? (?=0.000) H magnitude
30- 35 F6.3 mag Kmag ? (?=0.000) K magnitude
40- 51 F12.8 deg RAdeg Right ascension in decimal degrees (J2000)
55- 66 F12.8 deg DEdeg Declination in decimal degrees (J2000)
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Note (1): Stars are identified as
CL* NGC NNNN VFO NNNNN for NGC clusters,
Cl* TERZAN N VFO NNNNN for Terzan clusters.
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History:
Copied at http://www.bo.astro.it/~GC/ir_archive/
(End) Patricia Vannier [CDS] 04-Feb-2009