Interstellar medium in the central 1 kiloparsec of M82

Journal Article · Mon Dec 01 04:00:00 EST 1986 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/184797· OSTI ID:6541568

Lugten, J B; Watson, D M; Crawford, M K; Genzel, R

The spatial distribution of the 158 micron forbidden C II emission in the central 1 kiloparsec of the infrared galaxy M82 is discussed, and the detection of two fine-structure lines of forbidden O I and forbidden O III at 146 and 52 microns is reported. Within 500 pc of the nucleus, the far-infrared emission lines contain about 200 million solar luminosities. The neutral gas in the inner disk is in dense, relatively small clouds, thin filaments, or sheets of very low volume filling factor, associated with a lower density ionized medium of moderately high filling factor. Within 500 pc of the nucleus, about 30 million solar masses is contained in H II regions and 30 million solar masses in photodissociation regions. There is a component of ionized and neutral gas near LSR of roughly 150 km/s centered near the compact radio source 41.9 + 58 and elongated along the minor axis of M82. The gas is especially dense in this region and appears to be associated with X-ray emission and the inner H-alpha filaments. 38 references.

• Research Organization: California Univ., Berkeley; California Institute of Technology, Pasadena; DuPont Experimental Station, Wilmington, DE
• OSTI ID: 6541568
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 311; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
COSMIC GASES
COSMIC RADIO SOURCES
DISTRIBUTION
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FLUIDS
GALAXY NUCLEI
GASES
H2 REGIONS
IONIZING RADIATIONS
MASS
MORPHOLOGY
RADIATIONS
SPATIAL DISTRIBUTION
SPECTRA
X RADIATION