Formation of a Massive Black Hole at the Center of the Superbubble in M82 (original) (raw)
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, Ryohei Kawabe, Hironori Matsumoto, Takeshi G. Tsuru, Kotaro Kohno, Koh-Ichiro Morita, Sachiko K. Okumura, and Baltasar Vila-Vilaró
Published 2000 December 15 • © 2000. The American Astronomical Society. All rights reserved. Printed in U.S.A.
The Astrophysical Journal,Volume 545,Number 2Citation Satoki Matsushita et al 2000 ApJ 545 L107DOI 10.1086/317880
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Dates
- Received 2000 July 20
- Accepted 2000 October 12
- Published 2000 December 15
1538-4357/545/2/L107
Abstract
We performed 12CO (1-0), 13CO (1-0), and HCN (1-0) interferometric observations of the central region (about 450 pc in radius) of M82 with the Nobeyama Millimeter Array and have successfully imaged a molecular superbubble and spurs. The center of the superbubble is clearly shifted from the nucleus by 140 pc. This position is close to that of the massive black hole (BH) of ≳460 _M_☉ and the 2.2 μm secondary peak (a luminous supergiant-dominated cluster), which strongly suggests that these objects may be related to the formation of the superbubble. Consideration of star formation in the cluster based on the infrared data indicates that (1) the energy release from supernovae can account for the kinetic energy of the superbubble, (2) the total mass of stellar-mass BHs available for building up the massive BH may be much higher than 460 _M_☉, and (3) it is possible to form the middle-mass BH of 102-103 _M_☉ within the timescale of the superbubble. We suggest that the massive BH was produced and is growing in the intense starburst region.
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