J/MNRAS/402/1729 JHK photometry of 36 Galactic globular clusters (Valenti+ 2010)
Near-infrared properties of 12 globular clusters towards the inner bulge of the galaxy. Valenti E., Ferraro F.R., Origlia L. <Mon. Not. R. Astron. Soc., 402, 1729-1739 (2010)> =2010MNRAS.402.1729V
ADC_Keywords: Clusters, globular ; Photometry, infrared Keywords: techniques: photometric - Galaxy: bulge - globular clusters: general - infrared: stars Abstract: We present near-infrared colour-magnitude diagrams and physical parameters for a sample of 12 galactic globular clusters located towards the inner bulge region. For each cluster we provide measurements of the reddening, distance and photometric metallicity and of the luminosity of the horizontal branch red clump and the red giant branch bump and tip. The sample discussed here, together with that presented in Valenti, Ferraro & Origlia (2007, Cat. J/AJ/133/1287), represents the largest homogeneous catalogue of bulge globular clusters (comprising ∼80 per cent of the entire bulge cluster population) ever studied. The compilation is available in electronic form on the World Wide Web (http://www.bo.astro.it/~GC/ir_archive). Description: A set of J, H and K images of 12 bulge clusters, namely Ter 1, 2, 4, 9, Lill 1, HP 1, Djo 1, 2, NGC 6540, 6544, 6522 and 6453, was obtained at the European Southern Observatory (ESO), La Silla, during two observing runs in 2007 July and 2008 June. We used the near-IR camera SofI, mounted on the ESO New Technology Telescope (NTT) in large field-mode, which is characterized by a pixel size of 0.288arcsec and a total field of view of 4.9x4.9arcmin2. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 166 36 The Bulge Globular Cluster parameters for all clusters (Paper I + Paper II) phot/* 67 36 Individual JHK photometry
See also: J/AJ/133/1287 : JHK photometry of 24 Galactic globular clusters (Valenti+ 2007) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 7 A7 --- GlCl Globular name 8 A1 --- n_GlCl [*] Note on Name (1) 10- 15 F6.2 deg GLON [-15/21] Galactic longitude 17- 22 F6.2 deg GLAT Galactic latitude 24- 27 F4.1 kpc dSun Heliocentric distance 29- 31 F3.1 kpc RGC Galactocentric distance 33- 36 F4.1 kpc X X Sun-centred coordinate 38- 41 F4.1 kpc Y Y Sun-centred coordinate 43- 47 F5.2 kpc Z Z Sun-centred coordinate 48- 52 F5.2 mag E(B-V) B-V colour excess 54- 58 F5.2 mag (m-M)0 Deredenned distance modulus 60- 64 F5.2 [-] [Fe/H] Metallicity [Fe/H] (2) 66- 70 F5.2 [-] [M/H] Metallicity [M/H] 72- 76 F5.2 mag JRC ?=- Horizontal Branch Red Clump J magnitude 78- 82 F5.2 mag HRC ?=- Horizontal Branch Red Clump H magnitude 84- 88 F5.2 mag KsRC ?=- Horizontal Branch Red Clump Ks magnitude 90- 94 F5.2 mag Jmag.B ?=- Bump J magnitude 96-100 F5.2 mag Hmag.B ?=- Bump H magnitude 102-106 F5.2 mag Kmag.B ?=- Bump Ks magnitude 108-112 F5.2 mag Jmag.T Tip J magnitude 114-118 F5.2 mag Hmag.T ?=- Tip H magnitude 120-124 F5.2 mag Kmag.T ?=- Tip Ks magnitude 126-129 F4.2 mag Mbol.B ?=- RGB Bump bolometric magnitude (3) 131-135 F5.2 mag Mbol.T ?=- Tip bolometric magnitude (3) 137-148 A12 --- CMD Name of the file containing the CMD, at http://www.bo.astro.it/~GC/ir_archive/ 150-154 I5 --- N Number of stars with photometry in FileName 156-166 A11 --- FileName Name of the file containing the JHK photometry, in subdirectory phot
Note (1): For all the clusters marked with (*) the metallicity estimates ([Fe/H] and [M/H]) have been derived by using the empirical method of Ferraro, Valenti & Origlia (2006ApJ...649..243F; see also IR relations at http://www.bo.astro.it/~GC/ir_archive/IRrelations.html) Note (2): [Fe/H] is in the Carretta & Gratton (1997, J/A+AS/121/95) scale. 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), and by adopting the reddening and distance values listed in Table 1 and the extinction coefficients of Savage & Mathis (1979ARA&A..17...73S).
Byte-by-byte Description of file: phot/*
Bytes Format Units Label Explanations
4- 8 I5 --- Seq Sequential number within the cluster (1) 12- 17 F6.3 mag Jmag ?=0.000 SOFI J magnitude 21- 26 F6.3 mag Hmag ? (?=0.000) SOFI H magnitude 30- 35 F6.3 mag Kmag ? (?=0.000) SOFI Ks magnitude 40- 52 F13.9 deg RAdeg Right ascension in decimal degrees (J2000) 55- 67 F13.9 deg DEdeg Declination in decimal degrees (J2000)
Note (1): Stars are identified as: Cl* NGC NNNN VFO NNNNN for NGC clusters, Cl* TERZAN N VFO NNNNN for Terzan clusters, Cl* HP 1 VFO NNNNN for HP1 cluster, Cl* Liller 1 VFO NNNNN for Liller1 cluster, Cl* Djorg N VFO NNNNN for Djorg clusters.
History: Copied at http://www.bo.astro.it/~GC/ir_archive References: Valenti et al., Paper I 2007AJ....133.1287V, Cat. J/AJ/133/1287
(End) Patricia Vannier [CDS] 19-Jul-2010
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