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Paper: Molecular Gas in M82: Superbubble, Starburst, and Massive Black Hole
Volume: 249, The Central Kiloparsec of Starbursts and AGN: the La Palma Connection
Page: 711
Authors: Matsushita, Satoki; Kawabe, Ryohei; Matsumoto, Hironori; Tsuru, Takeshi Go; Kohno, Kotaro; Vila-VilarĂ³, Baltasar
Abstract: We performed deep 12CO (1 --> 0) interferometric observations of the starburst galaxy M82 with the Nobeyama Millimeter Array. We have successfully imaged an expanding molecular superbubble with a diameter of about 200 pc (about 14'') and a kinetic energy of about 1055 erg. The center of the superbubble is clearly shifted from the nucleus by 140 pc. This position is close to those of the intermediate-mass black hole (BH) and the 2.2 micron secondary peak. Calculations of the stellar population in the 2.2 micron secondary peak cluster based on a usual initial mass function for starburst galaxies suggest that it may be possible to form an intermediate-mass BH with stellar--stellar or BH--BH mergers. Our results may give a new explanation to the starburst--AGN connection.
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