J/MNRAS/434/3236 Masses of Praesepe members (Khalaj+, 2013)
The stellar mass function, binary content and radial structure of the open
cluster Praesepe derived from PPMXL and SDSS data.
Khalaj P., Baumgardt H.
<Mon. Not. R. Astron. Soc., 434, 3236-3245 (2013)>
=2013MNRAS.434.3236K 2013MNRAS.434.3236K
ADC_Keywords: Clusters, open ; Proper motions ; Photometry, infrared ;
Stars, masses
Keywords: stars: luminosity function, mass function -
open clusters and associations: individual: Praesepe
Abstract:
We have determined possible cluster members of the nearby open cluster
Praesepe (M44) based on J and K photometry and proper motions from the
PPMXL catalogue and z photometry from the Sloan Digital Sky Survey. In
total, we identified 893 possible cluster members down to a magnitude
of J=15.5mag, corresponding to a mass of about 0.15M☉ for an
assumed cluster distance modulus of (m-M)0=6.30mag (d∼182pc), within a
radius of 3.5° around the cluster centre. We derive a new cluster
centre for Praesepe (RAcentre=8:39:37, DEcentre=19:35:02). We also
derive a total cluster mass of about 630M☉, and a 2D half-number
and half-mass radius of 4.25 and 3.90pc, respectively.
Description:
In this study, we combine data from the PPMXL catalogue (Roser et al.,
2010AJ....139.2440R 2010AJ....139.2440R, Cat. I/317) with z magnitudes from SDSS DR9 (Ahn
et al., 2012ApJS..203...21A 2012ApJS..203...21A, Cat. V/139). The PPMXL catalogue combines
the USNO-B1.0 (Monet et al. 2003AJ....125..984M 2003AJ....125..984M, Cat. I/284) and 2MASS
catalogues (Skrutskie et al. 2006AJ....131.1163S 2006AJ....131.1163S, Cat. VII/233),
yielding the largest collection of proper motions in the International
Celestial Reference Frame to date (Roser et al., 2010AJ....139.2440R 2010AJ....139.2440R,
Cat. I/317). Cat. J/A+A/531/A92).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 73 893 Celestial coordinates, proper motions, magnitudes
and the masses of the possible members of
Praesepe sorted by right ascension
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See also:
I/257 : Proper Motions in Praesepe (Wang+, 1995)
I/284 : The USNO-B1.0 Catalog (Monet+ 2003)
I/317 : PPMXL Catalog (Roeser+ 2010)
V/139 : SDSS Photometric Catalog, DR 9 (Adelman-McCarthy+, 2012)
VII/233 : 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/AJ/134/2340 : Membership of Praesepe & Coma Berenices clusters
(Kraus+, 2010)
J/MNRAS/426/3419 : UKIDSS GCS Praesepe members (Boudreault+, 2012)
J/MNRAS/442/2081 : Praesepe members light curves (Kovacs+, 2014)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 deg RAdeg Right Ascension (J2000) (1)
12- 21 F10.6 deg DEdeg Declination (J2000) (1)
23- 27 F5.1 mas/yr pmRA Proper motion in RA (pmRA*cos(DE)) (1)
29- 31 F3.1 mas/yr e_pmRA Error of pmRA (1)
33- 37 F5.1 mas/yr pmDE Proper Motion in Dec (1)
39- 41 F3.1 mas/yr e_pmDE Error of pmDE (1)
43- 48 F6.3 mag Jmag 2MASS J magnitude (1)
50- 54 F5.3 mag e_Jmag Error of Jmag (1)
56- 61 F6.3 mag Kmag 2MASS Ks magnitude (1)
63- 67 F5.3 mag e_Kmag Error of Kmag (1)
69- 73 F5.3 Msun Mass Mass (2)
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Note (1): All data are from PPMXL
Note (2): Stellar masses are derived by J magnitudes using PADOVA isochornes.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 15-Sep-2014