Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...277..381b&link_type=abstract
Astronomy and Astrophysics, Vol. 277, NO. 2/OCT(I), P. 381, 1993
Astronomy and Astrophysics
Astrophysics
41
Scientific paper
High sensitivity, high angular and spectral resolution interferometric observations of the HCN(1-0) line in the South-West inner part of the starburst galaxy M 82 are presented. The feature interpreted by Nakai et al. (1987) as a molecular ring is resolved into a clumpy substructure where the clumps have sizes and masses comparable to Galactic Giant Molecular Cloud complexes. The combination of our data with other observations strongly suggests a picture of the interstellar medium in M 82 as a huge photodissociation/photoionization region with embedded tiny, hot, dense molecular cores. Although the absence of supernova remnants towards the molecular peaks seems to contradict massive star formation, we argue that star formation does take place inside the molecular clumps. Of particular interest is a peculiar massive object close to the center which is spatially coincident with a 12.4 micron peak and coincident or very close to the radio recombination line center of M 82. Diffuse emission to the South of the plane, already present in other observations, is detected.
Brouillet Nathalie
Schilke Peter
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