Small grains in M82 - A dusty halo surrounding the starburst

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185499· OSTI ID:5398011

Telesco, C M; Decher, R; Joy, M ^[1]

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1. NASA, Marshall Space Flight Center, Huntsville, AL (USA)

The well-known starburst in M82 at 10.8, 19.2, and 30 microns has been mapped. Scans along the galactic plane which are derived from these data reveal marked color variations with position. These color variations are correlated with the UV energy density in a manner explicable in terms of a heated mixture of dust grains extending to very small sizes. Many of the small grains may have been destroyed in the most intense regions of the starburst, but they have survived in a halo where the UV energy density is too low to destroy them but still high enough to significantly heat them. Implications of the results for interpreting IR continuum emission from starburst galaxies are considered. 22 refs.

• OSTI ID: 5398011
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 343; 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
COLOR
COSMIC DUST
DUSTS
ELECTROMAGNETIC RADIATION
GALAXIES
HEATING
INFRARED RADIATION
INTERSTELLAR GRAINS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PARTICLES
PHYSICAL PROPERTIES
RADIATIONS
STAR EVOLUTION
ULTRAVIOLET RADIATION
VARIATIONS