J/AJ/134/2340 Membership of Praesepe and Coma Berenices clusters (Kraus+, 2007)
The stellar populations of Praesepe and Coma Berenices.
Kraus A.L., Hillenbrand L.A.
<Astron. J., 134, 2340-2352 (2007)>
=2007AJ....134.2340K 2007AJ....134.2340K
ADC_Keywords: Clusters, open ; Proper motions ; Magnitudes
Keywords: open clusters and associations: individual: Praesepe, Coma Berenices -
stars: evolution - stars: fundamental parameters -
stars: luminosity function, mass function
Abstract:
We present the results of a stellar membership survey of the nearby
open clusters Praesepe and Coma Berenices. We have combined archival
survey data from the SDSS, 2MASS, USNOB1.0, and UCAC-2.0 surveys to
compile proper motions and photometry for ∼5 million sources over
300°2. Of these sources, 1010 stars in Praesepe and 98 stars in
Coma Ber are identified as candidate members with probability >80%;
442 and 61 are identified as high-probability candidates for the first
time. We estimate that this survey is >90% complete across a wide
range of spectral types (F0-M5 in Praesepe, F5-M6 in Coma Ber). We
have also investigated the stellar mass dependence of each cluster's
mass and radius in order to quantify the role of mass segregation and
tidal stripping in shaping the present-day mass function and spatial
distribution of stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 145 1130 Candidate Members of Praesepe
table4.dat 115 149 Candidate Members of Coma Ber
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See also:
J/AJ/124/1570 : JHKs photometry in Praesepe (Adams+, 2002)
J/MNRAS/365/447 : Coma Berenices cluster new stellar members (Casewell+, 2006)
Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [2MASS]
7- 23 A17 --- 2MASS The 2MASS identification (JHHMMSSss+DDMMSSs)
25- 28 A4 --- SpT MK Spectral Type
30- 32 F3.1 --- e_SpT Uncertainty in SpType
34- 38 F5.2 mag mbol Bolometric magnitude
40- 43 F4.2 mag e_mbol Uncertainty in Bolmag
45- 49 F5.1 mas/yr pmRA Proper motion in Right Ascension
51- 55 F5.1 mas/yr pmDE Proper motion in Declination
57- 60 F4.1 mas/yr e_pm Uncertainty in the proper motion
62- 66 F5.1 % Pmem Membership probability
68-145 A78 --- P-ID Previous identification with reference (1)
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Note (1): For table3 (Praesepe), the survey by Adams et al. (2002, Cat.
J/AJ/124/1570) used standard 2MASS names for their sources. We already
provide these names in the first column, so we have labelled the
sources as AD NNNN (where NNNN represents the number of the entry in
their results table) in the interest of brevity.
For table4 (Coma Ber), the survey by Casewell et al. (2006, Cat.
J/MNRAS/365/447) did not give explicit names for their sources, so we
have labelled the sources as CJD NN (where NN represents the number of
the entry in their results table)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-2010