Published June 1989 | Version v1
Journal article Metadata-only

IRAS observations of optically selected galaxies. I. The properties of the UGC redshift sample

Creators

  • 1. California Institute of Technology, Pasadena (USA)
  • 2. Michigan Univ., Ann Arbor (USA)

Description

The FIR properties of more than 2400 optically selected galaxies in the Uppsala General Catalog are examined. The galaxies were detected by IRAS at 60 and 100 microns and have measured redshifts. A simple radiative transfer model is presented to study the nature of dust-heating sources. It is shown that for many normal disk galaxies, dust heated by old disk stars competes with dust heated by UV photons from newly formed stars. It is found that the 60-micron/100-micron flux density ratio may be used as an indicator of the dominant dust-heating source. Scaling relations with galaxy size and mass are presented which make it possible to estimate the contributions of any cirrus-like component to the total FIR luminosity. 84 refs

Additional details

Publishing Information

Journal Title
Astrophysical Journal
Journal Volume
341
Series
Astrophys. J.
Journal Page Range
129-150
ISSN
0004-637X
CODEN
ASJOA

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
21004528
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
COSMIC DUST; EQUILIBRIUM; FAR INFRARED RADIATION; FLUX DENSITY; GALAXIES; HEATING; INDEXES; LUMINESCENCE; LUMINOSITY; MASS; MORPHOLOGICAL CHANGES; RADIATION TRANSPORT; RED SHIFT; SIZE; STAR EVOLUTION; STATISTICS; THERMODYNAMICS
Descriptors DEC
DOCUMENT TYPES; DUSTS; ELECTROMAGNETIC RADIATION; EMISSION; INFRARED RADIATION; MATHEMATICS; OPTICAL PROPERTIES; PHOTON EMISSION; PHYSICAL PROPERTIES; RADIATIONS