H I observations of three IRAS detected elliptical galaxies

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168556· OSTI ID:6770098

Walsh, D E.P.; Van Gorkom, J H; Bies, W E; Katz, N; Knapp, G R ^[1]

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1. Princeton Univ. Observatory, NJ (USA) National Radio Astronomy Observatory, Socorro, NM (USA) Columbia Univ., New York, NY (USA)

Three elliptical galaxies with strong far-infrared emission (IRAS flux density greater than 1 Jy at 100 microns) were observed in the H I 21 cm line with the VLA. Only one of these, dwarf NGC 855, was detected. This galaxy has an extended H I distribution which is highly inclined to the optical major axis and a weak radio continuum source. Deep optical images show complex structure in the inner regions and emission lines suggestive of star formation. It is likely that this star formation and the cool interstellar medium are sources for the far-IR luminosity. IC 1459 is in a group containing several spirals and shows signs of recent interaction. Neutral hydrogen was not detected, but there is a powerful central radio continuum source, and the 100-micron emission is plausibly explained as arising from this source. It is likely that a small amount of dust heated by a strong radiation field is providing the far-IR luminosity. The infrared properties of these galaxies are similar, but the IR emission seems to have three different origins, complicating the interpretation of IRAS data for ellipticals. 61 refs.

• OSTI ID: 6770098
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 352; 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
CONFIGURATION
COSMIC DUST
COSMIC GASES
COSMIC RADIO SOURCES
DATA PROCESSING
DUSTS
ELECTROMAGNETIC RADIATION
ELEMENTS
ELLIPTICAL CONFIGURATION
FAR INFRARED RADIATION
FLUIDS
FLUX DENSITY
GALAXIES
GASES
H1 REGIONS
HYDROGEN
INFRARED RADIATION
INTERSTELLAR SPACE
NONMETALS
ORIGIN
PROCESSING
RADIATIONS
RADIOWAVE RADIATION
SPACE