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J/A+A/307/80 Velocities of red giants in NGC 2099 (Mermilliod+ 1996)
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Red giants in open clusters: V. NGC 2099
Mermilliod J.-C., Huestamendia G., Del Rio G., Mayor M.
<Astron. Astrophys. 307, 80 (1996)>
=1996A&A...307...80M (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, open ; Radial velocities
Keywords: clusters: open - individual: NGC 2099 - binaries: spectroscopic -
techniques: radial velocities
Description:
474 radial-velocity observations and new UBV photoelectric data for 55
and 20 red giants respectively, in the field of the intermediate-age
open cluster NGC 2099 are presented and analysed for membership and
duplicity. The membership of 35 red giants has been confirmed, 16
spectroscopic binaries have been discovered and 11 orbits have been
determined. The cluster binary-frequency lower limit is slightly above
the average (9/35=26%). The radial distribution of the red giants
shows a sharp limit between members and non-members. No mass
segregation is observed between the binary and single red giants. The
latest isochrones from the Geneva and Padova groups reproduce very
well the observed morphology in the colour-magnitude diagram for log
t=8.65 and z=0.02, with (m-M)=11.50 and E(B-V)=0.29.
Objects:
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RA (2000) DE Name(s)
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05 52.3 +32 33 NGC 2099 = M37
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
n2099.dat 38 474 Radial velocity data for NGC 2099
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See also:
Paper I =1989A&A...219..125M : NGC 2447, 2539, 2632, 6633 and 6940
Paper II =1989A&AS...79...11M : Binaries in
NGC 2360, 2437, 2447, 5822, 5823 and 6475
Paper III =1990A&A...237...61M : NGC 2360, 2423, 5822, 6811 and IC 4756
J/A+A/299/53 : Part IV. NGC 3680 and IC 4651 (Mermilliod+ 1995)
J/A+A/319/481 : Part VI. 10 spectroscopic binaries orbits (Mermilliod+ 1997
J/A+A/324/91 : Part VII. Mel 71 red giants radial vel. (Mermilliod+ 1997)
Byte-by-byte Description of file: n2099.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID Star number (1)
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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Note (1): The numbering system used for NGC 2099 is from:
von Zeipel H., Lindgren J. 1921, Kungl.Sven.Vet.Handl. 61 no 15
(1921KSVH...61...15V)
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Courtesy: Jean-Claude Mermilliod <mermio@scsun.unige.ch>
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(End) Simona Mei [CDS] 17-Aug-1995