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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
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:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table.dat         64      318   Derived radial velocities of the outer sample stars


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

   Bytes Format Units   Label     Explanations

   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)


Acknowledgements:
    Antonio Sollima, asollima(at)iac.es
(End)        Antonio Sollima [IAC, Spain], Patricia Vannier [CDS]    10-Jul-2009