A multi-line study of the molecular interstellar medium in M 82's starburst nucleus

Astronomy and Astrophysics – Astrophysics

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Galactic Nuclei, Interstellar Matter, Molecular Gases, Starburst Galaxies, Brightness Distribution, Carbon Monoxide, Emission Spectra, Interstellar Gas, Molecular Spectra, Radiative Transfer, Star Formation

Scientific paper

The excitation and morphology of the molecular gas in the nucleus of the starburst galaxy M82 were investigated using C-12O J = 6-5, J = 3-2, J = 2-1, J = 1-0, CO-18 and CO-17 J = 2-1, HCN J = 3-2, HC-13N J = 1-0, and HCO(+) J = 3-2 molecular line emission. Among other results, it is found that a very massive and active star forming region about 10 arcsec SW of the nucleus produces a strong, narrow emission feature in several lines.

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