Optical and near-infrared observations of IRAS galaxies. II

Details Optical and near-infrared observations of IRAS galaxies. II Optical and near-infrared observations of IRAS galaxies. II

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...184...63m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 184, no. 1-2, Oct. 1987, p. 63-70.

Astronomy and Astrophysics

Astronomy

16

Blue Stars, Infrared Astronomy Satellite, Light (Visible Radiation), Near Infrared Radiation, Optical Measurement, Stellar Evolution, Charge Coupled Devices, H Ii Regions, Photometry, Spiral Galaxies

Scientific paper

Optical spectra, CCD images and near infrared (JHK) photometry have been obtained for a further 23 galaxies in the Soifer et al. (1984) IRAS minisurvey sample. As found also for the first 22 galaxies discussed in Paper I (Moorwood et al., 1986), most appear to be relatively normal spiral galaxies exhibiting H II region like emission spectra except for two cases of relatively weak Seyfert activity. The average far infrared luminosity in this sample (1.3×1011L_sun;) is, however, a factor of two larger than for the Paper I sample-partly attributable to a larger number of interacting systems. A good correlation found between J-H and the Balmer decrements provides further evidence that reddening in the near infrared is primarily an extinction effect.

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