J/other/BASI/35.53 JH photometry of Berkeley 59 (Sharma+, 2007)
Near-infrared JH photometry of young open cluster Be 59.
Sharma S., Ogura K., Pandey A.K., Ojha D.K., Bhatt B.C.
<Bull. Astron. Soc. India, 35, 53-63 (2007)>
=2007BASI...35...53S 2007BASI...35...53S
ADC_Keywords: Clusters, open ; Photometry, infrared
Keywords: open clusters - photometry - extinction - infrared
Abstract:
We present near-infrared JH photometry and optical slitless
spectroscopy of stars in the field of the young cluster Be 59. The
J/(J-H) colour-magnitude diagram of the cluster yields a distance
modulus of (m-M)0=10.0±0.2mag, which corresponds to a distance of
1.0±0.1kpc. Using the slitless spectroscopy we identified 9 Hα
emission line stars in the observed region. The location of Hα
stars in the CMD indicates that they may be pre-main sequence stars.
We have estimated the age of the cluster using the turn-off and
turn-on points and is found to lie between ∼1Myr to 4Myr. Two
massive stars (∼25M☉) in the cluster region have high membership
probability which indicates that the low mass stars (∼0.8M☉) may
co-exist with massive stars.
Description:
The JH NIR observations of Be 59 were carried out during 2004
September 24 and 25 with the Himalayan Chandra Telescope (HCT) NIR
camera (NIRCAM).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table23.dat 55 28 Photometric data of the stars in the field of
Be 59 and the detected Hα emission stars
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Byte-by-byte Description of file: table23.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number,
Cl* Berkeley 59 SOP NNN in Simbad
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 33 F5.2 mag Jmag Johnson J magnitude
35- 38 F4.2 mag e_Jmag rms uncertainty on Jmag
40- 44 F5.2 mag Hmag Johnson H magnitude
46- 49 F4.2 mag e_Hmag rms uncertainty on Hmag
51- 55 A5 --- Type Field or Hα star (1)
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Note (1): Type is one of:
field = stars in the field of Be 59 (table 2)
Ha = Detected Hα emission stars (table 3)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Aug-2007