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J/AJ/139/878      RGB stars in 8 LMC clusters                (Sharma+, 2010)
Toward the general red giant branch slope-metallicity-age calibration.
I. Metallicities, ages, and kinematics for eight Large Magellanic Cloud
clusters.
    Sharma S., Borissova J., Kurtev R., Ivanov V.D., Geisler D.
   <Astron. J., 139, 878-897 (2010)>
   =2010AJ....139..878S
ADC_Keywords: Magellanic Clouds ; Associations, stellar ; Stars, giant

Keywords: galaxies: star clusters: general - Magellanic Clouds -
          stars: abundances

Abstract:
    In this paper, we discuss the properties of color-magnitude diagrams,
    age, metallicity, and radial velocities of eight massive Large
    Magellanic Cloud (LMC) clusters using data taken from the FORS2
    multiobject spectrograph at the 8.2m Very Large Telescope/Unit
    Telescope 1. The strong near-infrared CaII triplet lines of red giant
    branch stars obtained from the high signal-to-noise ratio spectra are
    used to determine the metallicity and radial velocity of cluster
    members.

Description:
    Short exposure images of eight LMC clusters were observed with FORS2
    VLT through the filters V and R under excellent atmospheric conditions
    (seeing<0.7") on 2006 October 5 and 2006 November 17.

    The spectroscopic observations were carried out with FORS2 in visitor
    mode at the Antu (VLT-UT1) 8.2m telescope at ESO's Paranal
    Observatory during the night of 2006 November 16-17.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        35        8   Log of the imaging observations
table2.dat        83      198   Position and measured values for all RGB stars
                             (coordinates corrected by the author)


See also:
 J/A+A/480/379   : Abundances of 59 red giants in LMC (Pompeia+, 2008)
 J/MNRAS/383/183 : CaII triplet of RGB from VLT/FLAMES obs. (Battaglia+, 2008)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1-  7  A7    --      Cluster   Cluster name
   9- 10  I2    h       RAh       Right ascension (J2000)
  12- 13  I2    min     RAm       Right ascension (J2000)
  15- 16  I2    s       RAs       Right ascension (J2000)
      18  A1    ---     DE-       Declination sign (J2000)
  19- 20  I2    deg     DEd       Declination (J2000)
  22- 23  I2    arcmin  DEm       Declination (J2000)
  25- 26  I2    arcsec  DEs       Declination (J2000)
  28- 29  I2    s       ExpV      Exposure time in V band
  31- 32  I2    s       ExpR      Exposure time in R band
  34- 35  I2    ---     Nstar     Number of stars in table2


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1- 10  A10   ---     Star      Star designation, Cluster-NN
  12- 13  I2    h       RAh       Right ascension (J2000) (1)
  15- 16  I2    min     RAm       Right ascension (J2000)
  18- 22  F5.2  s       RAs       Right ascension (J2000)
      24  A1    ---     DE-       Declination sign (J2000) (1)
  25- 26  I2    deg     DEd       Declination (J2000) (1)
  28- 29  I2    arcmin  DEm       Declination (J2000)
  31- 34  F4.1  arcsec  DEs       Declination (J2000)
  36- 40  F5.1  km/s    RV        Radial velocity
  42- 45  F4.1  km/s    e_RV      rms uncertainty on RV
  47- 51  F5.2  mag     V-VHB     Brightness difference between star (V) and
                                       cluster's horizontal branch (VHB)
  53- 55  I3    ---     S/N       Signal-to-noise ratio
  57- 60  F4.2  0.1nm   SW        Sum of the EWs of three Ca triplet lines (2)
  62- 65  F4.2  ---     W'        Reduced equivalent width, W'=SW+β(V-VHB)
  67- 70  F4.2  ---     e_W'      rms uncertainty on W'
  72- 76  F5.2  [Sun]   [Fe/H]    Metallicity
  78- 81  F4.2  [Sun]   e_[Fe/H]  rms uncertainty on [Fe/H]
      83  A1    ---     Mmb       [mn] Membership (m, member; n, non-member)

Note (1): Positions corrected by the author (in the original publication, they
          are shifted towards SE from 1" to more).
Note (2): Where SW = EW(8498) + EW(8542) + EW(8662).



History:
  * 16-May-2012: from electronic version of the journal
  * 23-Oct-2012: Table 2, coordinates corrected by the author.
(End)                                      Patricia Vannier [CDS]    16-May-2012