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J/A+AS/108/621      Dust in Sb and Sc K-band                   (Peletier+, 1994)
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The distribution of dust in Sb's and Sc's - K-band infrared imaging of a
diameter limited sample of 37 galaxies
       Peletier R.F., Valentijn E.A., Moorwood A.F.M., Freudling W.
      <Astron. Astrophys. Suppl. Ser. 108, 621 (1994)>
      =1994A&AS..108..621P      (SIMBAD/NED Reference)
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ADC_Keywords: Galaxies, optical; Photometry, infrared
Keywords: galaxies: photometry - galaxies: spiral - galaxies: structure -
          galaxies: ISM - infrared: galaxies

Abstract:
   We present deep infrared K-band surface photometry for a diameter-limited 
   sample of normal Sb and Sc galaxies. In addition, surface brightness, 
   optical and optical-infrared colors and isophote-shapes have been obtained 
   from the ESO-LV B and R photographic images of these galaxies. For each 
   galaxy we present global photometric parameters, as well as individual 
   radial surface brightness and color profiles. Our analysis includes the 
   fitting of ellipses in the three bands, bulge-disk decompositions, and the 
   derivation of growth curves in elliptical apertures. The main conclusion of
   the paper is that these galaxies exhibit very large color gradients - B and
   K scale length ratios vary between 1.2 and 2.0 and increase with axis ratio.
   The large magnitude of these gradients suggest that they are not due to 
   stellar population differences, but are primarily due to extinction by dust
   in the B-band. We also find that the range of central surface brightnesses 
   in the K-band is considerably larger than in B, showing that the stellar 
   properties are better studied in K. A more detailed evaluation of the 
   results, specifically with regard to the spatial distribution of both the 
   dust and the stars in Sb and Sc galaxies, will be presented in an 
   accompanying paper (Peletier et al. 1994, Paper II).

File Summary:
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 FileName    Lrecl    Records    Explanations
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ReadMe          80          .    This file
table           69       1241    Surface photometry and colors
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Byte-by-byte Description of file: table
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   Bytes Format  Units      Label    Explanations
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   1- 15  A15    ---        Name     Source name
  17- 21  F5.2   arcsec     Rad      Radius (sqr(ab))
  24- 28  F5.2 mag/arcmin2  Mu(K)    []? Surface brightness in K band
  31- 34  F4.2   mag        B-R      []? B-R colour
  40- 43  F4.2   mag      e_B-R      []? rms uncertainty on B-R
  46- 50  F5.3   mag        B-K      []? B-K colour
  53- 56  F4.2   mag      e_B-K      []? rms uncertainty on B-K
  59- 63  F5.3   ---        Epsilon  Ellipticity (1-b/a)
  65- 69  F5.1   deg        Phi      Position angle in K band
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(End)                                          Patricia Bauer [CDS] 29-Aug-1994