J/MNRAS/396/2183 Radial velocities of red giants in ω Cen (Sollima+ 2009)
The non-peculiar velocity dispersion profile of the stellar system
omega Centauri.
Sollima A., Bellazzini M., Smart R.L., Correnti M., Pancino E.,
Ferraro F.R., Romano D.
<Mon. Not. R. Astron. Soc. 396, 2183 (2009)>
=2009MNRAS.396.2183S 2009MNRAS.396.2183S
ADC_Keywords: Clusters, globular ; Radial velocities ; Stars, giant ;
Stars, population II ; Photometry, infrared
Keywords: techniques: radial velocities - stars: kinematics -
stars: Population II - globular clusters: Omega Cen
Abstract:
We present the results of a survey of radial velocities over a wide
region extending from r~=10 out to 80' (∼1.5 tidal radii) within the
massive star cluster omega Centauri (omega Cen). The survey was
performed with FLAMES@VLT, to study the velocity dispersion profile in
the outer regions of this stellar system. We derived accurate radial
velocities for a sample of 2557 newly observed stars, identifying 318
bona fide cluster red giants. Merging our data with those provided by
our previous survey, we assembled a final homogeneous sample of 946
cluster members that allowed us to trace the velocity dispersion
profile from the centre out to r∼32'.
Description:
The radial velocity catalogue of omega Cen is based on spectra secured
with 28 FLAMES pointings at distances 10'<r<80' from the center of the
cluster. The limiting magnitude is K≤13mag and the positional accuracy
is better than 0.2".
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 64 318 Derived radial velocities of the outer sample stars
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/ApJ/462/241 : Ca abundance for Omega Cen red giants (Norris+ 1996)
J/AJ/114/1087 : Omega Cen radial velocities (Mayor+ 1997)
J/A+A/420/173 : JK photometry of Omega Cen red giants (Sollima+, 2004)
J/AJ/127/980 : vby and BVI photometry of Omega Cen giants (Hughes+, 2004)
J/MNRAS/357/265 : BVI photometry of omega Cen red giants (Sollima+, 2005)
J/A+A/445/503 : Radial velocities in Omega Cen (NGC5139) (Reijns+, 2006)
J/ApJ/661/L155 : Radial velocities Rgb stars in omega Cen (Pancino+, 2007)
J/A+A/493/959 : UBV(RI)cHalpha photometry in omega Cen (Bellini+, 2009)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
5- 12 F8.4 km/s RV Radial velocity
14- 19 F6.4 km/s e_RV Error on the radial velocity
21- 26 F6.3 mag Jmag 2MASS J magnitude
28- 33 F6.3 mag Hmag 2MASS H magnitude
35- 40 F6.3 mag Kmag 2MASS K magnitude
42- 52 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000)
54- 64 F11.7 deg DEdeg Declination in decimal degrees (J2000)
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Acknowledgements:
Antonio Sollima, asollima(at)iac.es
(End) Antonio Sollima [IAC, Spain], Patricia Vannier [CDS] 10-Jul-2009