J/A+A/375/863 Photometry in NGC 2516 (Jeffries+, 2001)
Photometry and membership for low mass stars in the young open cluster NGC 2516
Jeffries R.D., Thurston M.R., Hambly N.C.
<Astron. Astrophys. 375, 863 (2001)>
=2001A&A...375..863J 2001A&A...375..863J
ADC_Keywords: Clusters, open ; Photometry
Keywords: open clusters and associations: individual: NGC 2516 -
stars: mass function, luminosity function - binaries: general
Abstract:
We present the results of a 0.86 square degree CCD photometric survey
of the open cluster NGC 2516, which has an age of about 150Myr and may
have a much lower metallicity than the similarly-aged Pleiades. Our
BVIc survey of cluster members is complete to V∼20 and is used to
select a preliminary catalogue of 1254 low mass (0.<M<2.0M☉)
cluster candidates, of which about 70-80 percent are expected to be
genuine. After applying corrections for contamination by non-members
and adding data for higher mass stars from the literature, we
investigate the cluster binarity, luminosity and mass function, mass
segregation and total mass. We find a binary fraction of 26±5%, for
A to M-type systems with mass ratios between 0.6 and 1, which is very
similar to the Pleiades.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 73 15495 The photometric catalogue for NGC 2516
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID Star number
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 19 F6.3 s RAs Right ascension (J2000)
22 A1 --- DE- Declination sign
23- 24 I2 deg DEd Declination (J2000)
26- 27 I2 arcmin DEm Declination (J2000)
29- 33 F5.2 arcsec DEs Declination (J2000)
36- 41 F6.3 --- Vmag V magnitude
44- 49 F6.3 --- B-V ?=-9.999 B-V colour index (1)
52- 57 F6.3 --- V-I ?=-9.999 V-I (Cousins) colour index (1)
60- 61 I2 --- F1 [-1/1] V vs B-V membership flag (2)
63- 64 I2 --- F2 [-1/1] V vs V-I membership flag (2)
66- 67 I2 --- F3 [-1/1] B-V vs V-I membership flag (2)
69- 70 I2 --- F4 [-1/1] Candidate membership flag (3)
73 I1 --- F5 [0/1] Binarity flag (4)
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Note (1): A value of -9.999 indicates that the value is unavailable
for this star.
Note (2): Refers to the tests outlined in Sect. 3.3. Flag is set to
1 if the star passes the test,
-1 if it fails or
0 if there is insufficient information to apply the test.
Note (3): A star is flagged with a
1 if it is a candidate member because it has not failed either of
the three membership tests, or is flagged with a
-1 if it has failed one or more of the tests and is classed as a
non-member.
Note (4): A candidate member (see note 2) is flagged with a
1 if it is a potential unresolved binary system, or
0 otherwise.
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Acknowledgements: Rob Jeffries
(End) Patricia Bauer [CDS] 27-Aug-2001