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A high velocity molecular cloud near the center of the Galaxy

Oka, Tomoharu; Hasegawa, Tetsuo; White, Glenn J.; Sato, Fumio; Tsuboi, Masato and Miyazaki, Atsushi (1998). A high velocity molecular cloud near the center of the Galaxy. In: The Central Regions of the Galaxy and Galaxies, 18-22 Aug 1997, Kyoto, Japan.

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In our high resolution CO J = 1-0 images taken with the 2x2 focal-plane array receiver at the 45 m telescope of Nobeyama Radio Observarory, we find a peculiar compact (< 5 pc) cloud, CO0.024-0.028, at about 5' north from the center of the Galaxy. CO0.024-0.028 stands out its extremely broad line width (DV ~300 km/s) and enhanced gas kinetic temperature (Tk ≥ 70 K). Recent observations with JCMT have revealed that CO0.024-0.028 is overwhelmingly bright in its CO J = 3-2 line emission, appearing even brighter than the Galactic center circumnuclear disk. In fact, CO0.024-0.028 is the dominant source in the vicinity of the nucleus of our Galaxy, and it clearly has a conspicuously high density and temperature. We are about to propose that CO0.024-0.028 may have been accelerated, heated and compressed by one or more SNRs younger than 1E4 years.

Item Type: Conference or Workshop Item
Copyright Holders: 1998 IAU
Extra Information: The central regions of the Galaxy and galaxies,
Proceedings of the 184th symposium of the International Astronomical Union, held in Kyoto, Japan, August 18-22, 1997.
Edited by Yoshiaki Sofue.
Dordrecht: Kluwer, 1998.
ISBN: 079235060X,
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
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Item ID: 32670
Depositing User: G. J. White
Date Deposited: 08 Mar 2012 14:42
Last Modified: 08 Dec 2018 09:47
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