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J/MNRAS/404/1475    JHK photometry of Leo I AGB and red giants   (Held+, 2010)
A near-infrared study of AGB and red giant stars in the Leo I dSph galaxy.
    Held E.V., Gullieuszik M., Rizzi L., Girardi L., Marigo P., Saviane I.
   <Mon. Not. R. Astron. Soc., 404, 1475-1489 (2010)>
   =2010MNRAS.404.1475H
ADC_Keywords: Galaxies, nearby ; Stars, giant ; Photometry, infrared

Keywords: stars: AGB and post-AGB - stars: carbon -
          galaxies: individual: Leo I - Local Group - galaxies: stellar content

Abstract:
    A near-infrared imaging study of the evolved stellar populations 
    in the dwarf spheroidal galaxy Leo I is presented. Based on JHK
    observations obtained with the WFCAM wide-field array at the United
    Kingdom Infrared Telescope, we build a near-infrared photometric
    catalogue of red giant branch (RGB) and asymptotic giant branch (AGB)
    stars in Leo I over a 13.5arcmin2 area. The V-K colours of RGB
    stars, obtained by combining the new data with existing optical
    observations, allow us to derive a distribution of global metallicity
    [M/H] with average [M/H]=-1.51 (uncorrected) or
    [M/H]=-1.24±.05(int)±0.15(syst) after correction for the mean age
    of Leo I stars.

Description:
    Observations of Leo I were carried out on 2005 April 19-20 using the
    NIR Wide Field Camera (WFCAM) at the UKIRT at Mauna Kea, Hawaii.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        48     7471   The NIR catalogue of Leo I stars over WFCAM
                            array No. 2
table4.dat        75       39   Candidate O-rich AGB stars in Leo I, as selected
                            from the NIR two-colour diagram (Fig. 6, region 1)
table5.dat        75       37  *Candidate C-rich AGB stars in Leo I

Note on table5.dat: All stars were selected from the NIR two-colour diagram
  (Fig. 6, region 4), with the exception of stars 7125 and 11242 which are
  spectroscopically identified C stars fainter than the TRGB


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1-  6  I6    ---    [HGR2010]  Sequential number
   8-  9  I2    h       RAh       Right ascension (J2000)
  11- 12  I2    min     RAm       Right ascension (J2000)
  14- 18  F5.2  s       RAs       [0/60] Right ascension (J2000)
      20  A1    ---     DE-       Declination sign (J2000)
  21- 22  I2    deg     DEd       Declination (J2000)
  24- 25  I2    arcmin  DEm       Declination (J2000)
  27- 30  F4.1  arcsec  DEs       [0/60] Declination (J2000)
  32- 36  F5.2  mag     Jmag      2MASS J magnitude  (1)
  38- 42  F5.2  mag     Hmag      2MASS H magnitude (1)
  44- 48  F5.2  mag     Ksmag     2MASS Ks magnitude (1)

Note (1): Our raw photometric catalogue was transformed to the 2MASS
     photometric system by applying the colour terms between WFCAM and
     2MASS systems derived for the UKIRT Infrared Deep Sky Survey (UKIDSS;
     Dye et al. 2006MNRAS.372.1227D), and zero-points directly computed
     from the median of the J H K magnitude differences between 2MASS and
     our WFCAM photometry in the colour range 0.0<J-K<1. 0, for stars in
     common with the 2MASS/PSC.


Byte-by-byte Description of file: table[45].dat

   Bytes Format Units   Label     Explanations

   1-  6  I6    ---    [HGR2010]  Sequential number
   8-  9  I2    h       RAh       Right ascension (J2000)
  11- 12  I2    min     RAm       Right ascension (J2000)
  14- 18  F5.2  s       RAs       [0/60] Right ascension (J2000)
      20  A1    ---     DE-       Declination sign (J2000)
  21- 22  I2    deg     DEd       Declination (J2000)
  24- 25  I2    arcmin  DEm       Declination (J2000)
  27- 30  F4.1  arcsec  DEs       [0/60] Declination (J2000)
  32- 36  F5.2  mag     Bmag      ?=- Johnson B magnitude
  38- 42  F5.2  mag     Vmag      ?=- Johnson V magnitude
  44- 48  F5.2  mag     Jmag      2MASS J magnitude
  50- 54  F5.2  mag     Hmag      2MASS H magnitude
  56- 60  F5.2  mag     Ksmag     2MASS Ks magnitude
  62- 75  A14   ---     Note      Cross-identifications (only in table5) (1)

Note (1): Cross-identifications with the surveys of
  Azzopardi et al. (1986A&A...161..232A, ALW, <ALW Leo I NN> in Simbad),
  Demers & Battinelli (2002AJ....123..238D, DB, <[DB2002] Leo I CNN> in Simbad)
  and Menzies et al. (2002MNRAS.335..923M, M02, <[MFT2002] A> in Simbad)
  are given. Probable variable stars in M02 are labelled 'v'.


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    01-Dec-2010