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J/A+A/285/404   Star formation in compact groups of galaxies  (Moles+ 1994)
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Star formation and merging in compact groups of galaxies
     Moles M., del Olmo A., Perea J., Masegosa J., Marquez I., Costa V.
    <Astron. Astrophys. 285, 404 (1994)>
    =1994A&A...285..404M
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ADC_Keywords: Galaxies, photometry; Photometry, UBV
Keywords: galaxies: clustering - galaxies: interactions -
          galaxies: kinematics and dynamics - galaxies: photometry

Abstract:
    New UBV aperture photometry for 177 galaxies in Hickson compact groups is 
    presented. The analysis of the color-color diagram indicates that, 
    contrary to what one naively would expect, only a slight enhancement in 
    their star formation rates is present. The results are confirmed by the 
    analysis of the IRAS data, taking in particular into account the 25{mu}m 
    detections. Star formation in compact groups is not found to be higher 
    than in isolated pairs of galaxies. Earlier results on the absence of 
    clear candidates for merger products of late type galaxies are confirmed 
    and strengthened. It is pointed out that the relation between velocity 
    dispersion and morphological mixing found for Hickson groups could be one 
    of the clues to understand the evolution of galaxies in them.

File Summary:
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 FileName    Lrecl    Records    Explanations
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ReadMe          80          .    This file
table1.dat      60        177    UBV photometry of galaxies in Hickson
                                 compact groups
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See also:
    VII/213 : Hickson's Compact groups of Galaxies (Hickson+ 1982-1994)

Byte-by-byte Description of file: table1.dat
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   Bytes Format  Units   Label    Explanations
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   1-  5  A5     ---     HG       Hickson group/galaxy identification
   8-  9  I2     ---     Type     Morphological type  (1)
  11- 12  I2     arcsec  Ap       Used aperture
  15- 18  F4.2   mag     B-V      Observed (B-V) color index
  20- 24  F5.2   mag     U-B      Observed (U-B) color index
  27- 31  F5.2   mag     B        Observed B magnitude
  34- 37  F4.2   mag     (B-V)c   (B-V) corrected for galactic extinction
                                                      and K effect
  39- 43  F5.2   mag     (U-B)c   (U-B) corrected for galactic extinction
                                                      and K effect
  46- 50  F5.2   mag     Bc       B corrected for galactic extinction
                                                      and K effect
  52- 54  I3     arcsec  Ae       Estimated effective aperture
  57- 60  F4.1   mag     BT       Total B magnitude
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Note (1): Morphological codes:
         0 for ellipticals,
         1 and 2 for S0 and S0a;
         3 to 11 for Sa to Sm;
        12 and 13 for irregulars.
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(End)                                           Patricia Bauer [CDS] 22-Feb-1994