J/MNRAS/462/3401 Proper motions of blue stragglers in 38 GC (Simunovic+, 2016)
Blue straggler star populations in globular clusters.
II. Proper-motion cleaned HST catalogues of BSSs in 38 Galactic GCs.
Simunovic M., Puzia T.H.
<Mon. Not. R. Astron. Soc., 462, 3401-3418 (2016)>
=2016MNRAS.462.3401S 2016MNRAS.462.3401S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Proper motions
Keywords: proper motions - blue stragglers - globular clusters: general
Abstract:
We present new blue straggler star (BSS) catalogues in 38 Milky Way
globular clusters (GCs) based on multipassband and multi-epoch
treasury survey data from the Hubble Space Telescope. We measure
precise astrometry and relative proper motions of stars in all target
clusters and performed a subsequent cluster membership selection. We
study the accuracy of our proper-motion measurements using estimates
of central velocity dispersions and find very good agreement with
previous studies in the literature. Finally, we present a homogeneous
BSS selection method, that expands the classic BSS selection parameter
space to more evolved BSS evolutionary stages. We apply this method to
the proper-motion cleaned GC star catalogues in order to define
proper-motion cleaned BSS catalogues in all 38 GCs, which we make
publicly available to enable further study and follow-up observations.
Description:
We present a comprehensive proper-motion analysis based on HST
observations of 38 Galactic GCs obtained by two public treasury
surveys ('The ACS Globular Cluster Survey', GO-10775, see Sarajedini
et al., 2007AJ....133.1658S 2007AJ....133.1658S, and 'The HST Legacy Survey of Galactic
Globular Clusters: Shedding UV Light on Their Populations and
Formation', GO-13297, see Piotto et al.. 2015AJ....149...91P 2015AJ....149...91P).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 69 38 Properties of the target GC sample
catalog.dat 66 1510 Proper-motion cleaned blue straggler star (BSS)
catalogue
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See also:
J/A+A/459/489 : Blue straggler stars in open clusters (De Marchi+, 2006)
J/A+A/463/789 : Blue stragglers in open clusters (Ahumada+, 2007)
J/A+A/483/183 : Catalogue of Blue Stragglers (Moretti+, 2008)
J/A+AS/109/375 : Blue stragglers in open clusters (Ahumada+, 1995)
J/MNRAS/264/273 : CCD photometry of NGC 1261 (Ferraro+ 1993)
J/A+A/516/A23 : UBVI Photometry of NGC 1261 (Kravtsov+, 2010)
http://www.astro.puc.cl/~msimunov/research.html : Catalogs Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- NStars Number of BSS in the cluster
4- 11 A8 --- Cluster NGC cluster name (1)
13- 17 A5 --- Name Other name cluster (1)
19- 20 I2 h RAh Right ascension (J2000) (1)
22- 23 I2 min RAm Right ascension (J2000) (1)
25- 29 F5.2 s RAs Right ascension (J2000) (1)
31 A1 --- DE- Declination sign (J2000) (1)
32- 33 I2 deg DEd Declination (J2000) (1)
35- 36 I2 arcmin DEm Declination (J2000) (1)
38- 41 F4.1 arcsec DEs Declination (J2000) (1)
43- 47 F5.2 [-] [Fe/H] Metallicity (1)
49- 53 F5.2 mag VMAG Absolute V magnitude (1)
55- 58 F4.2 arcmin rh Half-light radius (1)
60- 64 F5.2 km/s sigma Calculated expected central velocity
dispersion described in Section 4.2
66- 69 F4.2 km/s e_sigma rms uncertainty on sigma
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Note (1): taken from Harris (1996AJ....112.1487H 1996AJ....112.1487H, Cat. VII/195).
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Cluster NGC cluster name
10- 15 I6 --- ID Star number within the cluster (1)
17- 27 F11.7 deg RAdeg Right ascension (J2000) (1)
29- 39 F11.7 deg DEdeg Declination (J2000) (1)
41- 46 F6.3 mag F606W F606W magnitude (1)
48- 52 F5.3 mag F606W-F814W F606W-F814W colour index (1)
54- 59 F6.3 mas/yr pmRA Proper motion along RA, pmRA*cosDE (2)
61- 66 F6.3 mas/yr pmDE Proper motion along DE (2)
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Note (1): taken from the original ACS catalogues from Sarajedini et al.
(2007AJ....133.1658S 2007AJ....133.1658S)
Note (2): proper-motion values in sky coordinates, taking into account the
cos(Dec) correction. They have been converted to mas/yr units, assuming a
7yr baseline and the ACS/WFC pixel size (0.05-arcsec/pix).
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History:
From electronic version of the journal
References:
Simunovic & Puzia, Paper I 2014ApJ...782...49S 2014ApJ...782...49S
(End) Patricia Vannier [CDS] 27-Mar-2018