Small grains in M82 - A dusty halo surrounding the starburst

Details Small grains in M82 - A dusty halo surrounding the starburst Small grains in M82 - A dusty halo surrounding the starburst

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...343l..13t&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 343, Aug. 1, 1989, p. L13-L16.

Astronomy and Astrophysics

Astrophysics

28

Cosmic Dust, Interstellar Matter, Irregular Galaxies, Starburst Galaxies, Color, Infrared Radiation, Star Formation, Ultraviolet Radiation

Scientific paper

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.

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