Access to Astronomical Catalogues

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
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:

       FileName      Lrecl  Records   Explanations

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


Byte-by-byte Description of file: table23.dat

   Bytes Format Units   Label     Explanations

   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)

Note (1): Type is one of:
  field = stars in the field of Be 59 (table 2)
     Ha = Detected Hα emission stars (table 3)


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    27-Aug-2007