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J/A+A/324/91        Melotte 71 red giants radial velocities (Mermilliod+ 1997)
Red giants in open clusters: VII. Melotte 71
    Mermilliod J.-C., Claria J.J., Andersen J., Mayor M.
   <Astron. Astrophys. 324, 91 (1997)>
   =1997A&A...324...91M      (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, giant ; Radial velocities

Keywords: clusters: open: individual: Mel 71 - binaries: spectroscopic -
          HR diagram

Abstract:
    New CORAVEL radial-velocity observations and UBV photometry of 24 red
    giants in the field of the intermediate-age open cluster Mel 71 are
    analysed for membership and duplicity. The membership of 16 stars is
    confirmed, one star is a possible member, and 8 spectroscopic binaries
    have been discovered, all amongst the cluster stars. Four of their
    orbits have been determined, with periods ranging from 74 to 1627
    days. The mean cluster velocity is +50.14±0.14 (s.e.)km/s, and the
    binary frequency is unusually high (8/16=50%). The best isochrone fit
    to the observed colour-magnitude digram is obtained for logt=9.00 and
    Z=0.008. However, some discrepancies appear between the observed and
    predicted locations of the red giant clump.
Objects:
    -----------------------------------------
        RA   (2000)   DE     Designation(s)
    -----------------------------------------
     07 37 20.2   -12 05 53  Melotte 71
    -----------------------------------------

See also:
 J/A+A/299/53  : Part IV. NGC 3680 and IC 4651 (Mermilliod+ 1995)
 J/A+A/307/80  : Part V.  NGC 2099 (Mermilliod+ 1996)
 J/A+A/319/481 : Part VI. 10 spectroscopic binaries orbits (Mermilliod+ 1997)
 J/A+A/375/30  : Part IX. Radial velocities in open clusters (Mermilliod+ 2001)
 J/A+A/423/189 : Part XI. NGC 2477 red giants UBV phot. & RV (Eigenbrod+, 2004)


File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table4            38      198  *Radial velocity data for Melotte 71

Note on table4: The numbering system used for Melotte 71 is from
                 Hassan S.M., 1976A&AS...26....9H


Byte-by-byte Description of file: table4

   Bytes Format Units   Label     Explanations

   1-  4  I4    ---     ID        Star number
   8- 18  F11.3 d       HJD       Heliocentric Julian Date
      21  A1    ---     Comp      Component of a double-lined binary
  26- 31  F6.2  km/s    RV        Radial velocity
  34- 38  F5.2  km/s    e_RV      Error on the radial velocity


Acknowledgements: Jean-Claude Mermilliod 


References:
   Mermilliod & Mayor, Paper I  =1989A&A...219..125M
   Mermilliod et al.,  Paper II =1989A&AS...79...11M
   Mermilliod & Mayor, Paper III = 1990A&A...237...61M
   Mermilliod et al.,  Paper IV =1995A&A...299...53M
   Mermilliod et al.,  Paper V =1996A&A...307...80M
(End)                                         Patricia Bauer [CDS]   13-Jan-1997