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 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:
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RA (2000) DE Designation(s)
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07 37 20.2 -12 05 53 Melotte 71
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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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4 38 198 *Radial velocity data for Melotte 71
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Note on table4: The numbering system used for Melotte 71 is from
Hassan S.M., 1976A&AS...26....9H 1976A&AS...26....9H
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Byte-by-byte Description of file: table4
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Bytes Format Units Label Explanations
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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
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Acknowledgements: Jean-Claude Mermilliod
References:
Mermilliod & Mayor, Paper I =1989A&A...219..125M 1989A&A...219..125M
Mermilliod et al., Paper II =1989A&AS...79...11M 1989A&AS...79...11M
Mermilliod & Mayor, Paper III = 1990A&A...237...61M 1990A&A...237...61M
Mermilliod et al., Paper IV =1995A&A...299...53M 1995A&A...299...53M
Mermilliod et al., Paper V =1996A&A...307...80M 1996A&A...307...80M
(End) Patricia Bauer [CDS] 13-Jan-1997