J/ApJ/546/1006 VRI photometry of M35 (Barrado y Navascues+, 2001)
From the top to the bottom of the main sequence: a complete mass function of the
young open cluster M35.
Barrado y Navascues D., Stauffer J.R., Bouvier J., Martin E.L.
<Astrophys. J. 546, 1006 (2001)>
=2001ApJ...546.1006B 2001ApJ...546.1006B
ADC_Keywords: Clusters, open ; Photometry, VRI
Keywords: open clusters and associations: individual (M35) -
tars: luminosity function, mass function
Abstract:
We present very deep and accurate photometry of the open cluster M35.
We have observed this association in the Cousins R, I filters,
together with the Johnson V filter. We have covered a region of
27.5x27.5 square arcmin, equivalent to a fifth of the total area of
the cluster. The data range from Ic=12.5 to 23.5mag, and the color
intervals are 0.4≤(V-I)c≤3.0, 0.5≤(R-I)c≤2.5. Roughly, these
values span from 1.6M☉ down to the substellar limit, in the case
of cluster members. By using the location of the stars on
color-magnitude and color-color diagrams, we have selected candidate
members of this cluster. We have merged our sample with previously
published data and obtained a color-magnitude diagram for the complete
stellar population of the cluster, covering the spectral range early
B-mid M. Based on the distribution of field and cluster stars in
color-magnitude and color-color diagrams, we estimate that two-thirds
of these candidates are likely to be true members of M35. These stars
approximately double the number of stars identified as candidate
members of this cluster (∼2700). We provide the photometry and
accurate positions of these stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 81 1945 M35 candidates
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See also:
http://obswww.unige.ch/webda/ : WEBDA homepage
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- BSB Identification number (Cl* NGC 2168 BSB NNNN)
6- 11 F6.3 mag VmagK ? KPNO Johnson V band magnitude
13- 18 F6.3 mag ImagK ? KPNO Cousins I band magnitude
20- 24 F5.3 mag (V-I)K ? KPNO Johnson-Cousins V-I color index
26- 31 F6.3 mag ImagC ? CFHT Cousins I_ band magnitude
33- 37 F5.3 mag (R-I)C ? CFHT Cousins R-I color index
39 I1 h RAh Right Ascension (J2000)
41 I1 min RAm Right Ascension (J2000)
43- 47 F5.2 s RAs Right Ascension (J2000)
48 A1 --- DE- Declination sign (J2000)
49- 50 I2 deg DEd Declination (J2000)
52- 53 I2 arcmin DEm Declination (J2000)
55- 58 F4.1 arcsec DEs Declination (J2000)
59 A1 --- --- [0]
61- 64 I4 --- WEBDA ? ID in Open Cluster Database (Mermilliod 1996,
see http://obswww.unige.ch/webda/)
identification number
66- 68 I3 --- MS86 ? McNamara & Sekiguchi (1986AJ.....91..557M 1986AJ.....91..557M)
identification number (Cl* NGC 2168 Cud NNN)
70- 73 I4 --- SB99 ? Sung & Bessell (1999MNRAS.306..361S 1999MNRAS.306..361S)
identification number (Cl* NGC 2168 SB NNNN)
75- 78 F4.2 --- Prob ? Membership probability
80- 81 A2 --- Mmb Final membership assignment (1)
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Note (1): Final membership assignment as follows:
Y+ = Star with radial velocity and/or with proper motion in agreement
with the cluster average
N+ = Star with radial velocity and/or with proper motion not in agreement
with the cluster average
Y = Star which only has V, I and/or R, I data.
N = Candidate member with position in the color-color diagram which does
not correspond to the cluster locus.
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History:
From electronic version
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 01-Mar-2001