Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..152h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 1, 1989, p. 152-172. Research supported by the Lowell Observatory
Astronomy and Astrophysics
Astronomy
75
Infrared Astronomy Satellite, Interstellar Extinction, Irregular Galaxies, Spiral Galaxies, Star Formation, Cosmic Dust, H I Regions, Ionized Gases, Stellar Mass
Scientific paper
IRAS 12, 25, 60, and 100 micron data are presented for a sample of Irr galaxies which span a large range in star-formation activity. It is found that the dwarf, giant, and amorphous Irr's generally have similar IR properties. The typical L(IR)/L(H-alpha) ratios of most classes of Irr's, except for many of the luminous blue galaxies, are low compared with those of spiral galaxies and are consistent with the Irr's being relatively transparent systems without large amounts of optically hidden star formation. Compared with spiral galaxies, the Irr's have similar L(IR)/L(B) ratios, warmer S(100)/S(60) ratios, cooler S(25)/S(12) ratios, and lower dust-to-H I gas mass ratios. The temperature, dust-to-H I gas mass ratios, and L(IR)/L(B) ratios do not correlate with the metallicity of the ionized gas of the Irr's. A correlation between the IR fluxes and both the H-alpha and the blue stellar fluxes is found for the Irr's.
Gallagher John S. III
Gillett Fred C.
Hunter Deidre Ann
Rice Walter L.
No associations
LandOfFree
IRAS observations of a large sample of normal irregular galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with IRAS observations of a large sample of normal irregular galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and IRAS observations of a large sample of normal irregular galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-825834