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J/A+A/437/61        Near-IR photometry of AGB stars in NGC 185    (Kang+, 2005)
Near-IR photometry of asymptotic giant branch stars in the dwarf elliptical
galaxy NGC 185.
     Kang A., Sohn Y.-J., Rhee J., Shin M., Chun M.-S., Kim H.-I.
    <Astron. Astrophys. 437, 61 (2005)>
    =2005A&A...437...61K
ADC_Keywords: Stars, giant ; Stars, carbon ; Photometry, infrared

Keywords: galaxies: individual: NGC 185 - galaxies: stellar content -
          stars: AGB and post-AGB

Abstract:
    J, H and K' images obtained with the Canada-France-Hawaii Telescope
    were used to investigate the stellar contents of asymptotic giant
    branch (AGB) in the dwarf elliptical galaxy NGC 185. The bright parts
    of (K, J-K) and (K, H-K) color-magnitude diagrams consist of a group
    of brights blue stars, a dominant populations of M-giants, and a red C
    star population. There were 73 C stars with a mean magnitude of
    <K≥16.26±0.38, corresponding to <MK≥-7.93 and mean colors of
    <(J-k)0≥2.253 and <(H-K)0≥0.865. The number ratio of C stars to
    M-giants was estimated to be 0.11±0.04 without any radial gradient
    from the center of NGC 185. The (J-K) and (H-K) color distributions of
    AGB stars showed an M-giant pick, blue and red tails, where the
    latter two correspond to AGB stars younger than those along M-giant
    peak and C stars. The bolometric luminosity functions of M-giants and
    C stars indicated that the M-giant AGB sequence has terminated at
    Mbol=-6.2, while the most luminous C star very similar to that of
    Nowotny et al. (2003, Cat. J/A+A/403/93) which was derived from VI
    band photometry. The logarithmic slope of the luminosity function for
    bright M-giant stars was estimated to be 0.83±0.02 in K band.
    Theoritical isochrone models, compared with the observed near-infrared
    photometric properties of AGB stars, indicated that the star formation
    in NGC 185 has a wide range of age span with possibly two different
    epochs of star formation.

Description:
    Table2 contains the equatorial coordinates, near-infrared photometric
    properties of 73 C stars, and color indices in VRI bands of
    cross-identified C stars with Nowotny et al. (2003, Cat.
    J/A+A/403/93) and Battinelli & Demers (2004, Cat. J/A+A/417/479).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        98       73   Coordinates and near-IR photometric properties
                              for 73 C stars


See also:
 J/A+A/417/479 : RI photometry of NGC 185 carbon stars (Battinelli+, 2004)
 J/A+A/403/93  : Photometry of AGB stars in NGC 185 and NGC 147 (Nowotny+, 2003)


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

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     Seq       Identification number of C star
   6-  7  I2    h       RAh       Right Ascension J2000 (hours)
   9- 10  I2    min     RAm       Right Ascension J2000 (minutes)
  12- 16  F5.2  s       RAs       Right Ascension J2000 (seconds)
      18  A1    ---     DE-       Declination J2000 (sign)
  19- 20  I2    deg     DEd       Declination J2000 (degrees)
  22- 23  I2    arcmin  DEm       Declination J2000 (minutes)
  25- 28  F4.1  arcsec  DEs       Declination J2000 (seconds)
  31- 36  F6.3  mag     Jmag      J band magnitude of C star
  38- 42  F5.3  mag     e_Jmag    Error of J magnitude
  45- 49  F5.3  mag     (J-K)     (J-K) colour index
  51- 55  F5.3  mag     e_(J-K)   Error of (J-K) colour
  58- 62  F5.3  mag     (H-K)     (H-K) colour index
  64- 68  F5.3  mag     e_(H-K)   Error of (H-K) colour
  71- 74  F4.2  mag     (V-i)o    ? (V-i) colour by Nowotny et al.
                                     (2003, Cat. J/A+A/403/93)
  76- 78  I3    ---     Nint      ? Internal number for [NKO2003] source
  80- 87  I8    ---    [NKO2003]  ? Identification number of Nowotny et al.
                                     (2003, Cat. J/A+A/403/93),
                                     [NKO2003] NGC 185 NNNNNNNN in Simbad
  90- 94  F5.3  mag     R-I       ? (R-I) color by Battinelli & Demers
                                      (2004, Cat. J/A+A/417/479)
  96- 98  I3    ---    [BD2004b]  ? Identification number of Battinelli &
                                      Demers (2004, Cat. J/A+A/417/479)


Acknowledgements: Aram Kang, breeze82(at)galaxy.yonsei.ac.kr

(End)                                        Patricia Vannier [CDS]  21-Mar-2005