High-resolution infrared maps from IRAS observations of large galaxies.

Details High-resolution infrared maps from IRAS observations of large galaxies. High-resolution infrared maps from IRAS observations of large galaxies.

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apjs...86..401g&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 86, no. 2, p. 401-451.

Astronomy and Astrophysics

Astronomy

22

Astronomical Maps, Astronomical Photometry, Galactic Structure, Infrared Astronomy Satellite, Field Of View, Flux Density, Optical Thickness, Temperature Distribution

Scientific paper

A sample of 18 large optical galaxies from the Large Galaxy Catalog, has been studied for structural properties by processing the IR images taken by IRAS pointed observations. Survey detectors (POSD) observations at 12, 25, 60, and 100 microns, as well as the Chopped Photometric Channel observations (CPC) at 50 and 100 microns, have been used for IRAS pointed observations. High angular resolution intensity maps of several of these galaxies have been obtained using a self-adaptive dynamically controlled image deconvolution scheme based on the maximum entropy method. From a comparative study of the processed CPC and POSD maps in the FIR, it has been shown that the CPC maps do give new reliable structural information, although only for sufficiently strong sources. The flux densities as well as the color temperatures correlate quite well. The POSD intensity maps have been additionally used to obtain maps of interband temperature and optical depth. From the optical depth maps at 25, 60, and 100 microns, it is found that for most of these cases the peaks are close to the galactic nuclei.

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