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

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/167478· OSTI ID:5710601

Bothun, G D; Lonsdale, C J; Rice, W ^[1]

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1. Michigan Univ., Ann Arbor (USA)

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.

• OSTI ID: 5710601
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 341; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CATALOGS
COSMIC DUST
DOCUMENT TYPES
DUSTS
ELECTROMAGNETIC RADIATION
EQUILIBRIUM
FAR INFRARED RADIATION
FLUX DENSITY
GALAXIES
HEATING
INFRARED RADIATION
LUMINESCENCE
LUMINOSITY
MASS
MATHEMATICS
MORPHOLOGY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATION TRANSPORT
RADIATIONS
RED SHIFT
SIZE
STAR EVOLUTION
STATISTICS
THERMODYNAMICS