J/MNRAS/416/3108 Membership of Sco OB2 moving group (Rizzuto+, 2011)
Multidimensional bayesian membership analysis of the Sco OB2 moving group.
Rizzuto A.C., Ireland M.J., Robertson J.G.
<Mon. Not. R. Astron. Soc., 416, 3108-3117 (2011)>
=2011MNRAS.416.3108R 2011MNRAS.416.3108R
ADC_Keywords: Clusters, open ; Populations, stellar
Keywords: methods: statistical - stars: early-type -
stars: kinematics and dynamics -
open clusters and associations: individual: Sco-Cen
Abstract:
We present a new high-mass membership of the nearby Sco OB2
association based on Hipparcos positions, proper motions and
parallaxes, and radial velocities taken from the 2nd Catalogue of
Radial Velocities with Astrometric Data (CRVAD-2). The Bayesian
membership selection method developed makes no distinction between
subgroups of Sco OB2 and utilizes linear models in calculation of
membership probabilities. We select 436 members, 88 of which are new
members not included in previous membership selections. We include the
classical non-members alpha-Cru and beta-Cru as new members as well as
the pre-main-sequence stars HIP 79080 and 79081. We also show that the
association is well mixed over distances of 8° on the sky, and
hence no determination can be made as to the formation process of the
entire association.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 8 436 Membership list and probabilities
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
III/254 : 2nd Cat. of Radial Vel. with Astrometric Data (Kharchenko+, 2007)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- HIP Hipparcos number
7- 8 I2 % Memb Membership probability
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Apr-2012