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Systematically Peculiar Molecular Composition in M 82: Regarding the Formation Mechanisms

Published online by Cambridge University Press:  30 March 2016

S. Takano ,
N. Nakai ,
K. Kawaguchi ,
T Takano ,
P. Schilke  and
G. Winnewisser
S. Takano
Affiliation:
Nobeyama Radio Observatory, National Astronomical Observatory of Japan, Nobeyama, Minamimaki, Minamisaku, 384-1305Japan
N. Nakai
Affiliation:
Nobeyama Radio Observatory, National Astronomical Observatory of Japan, Nobeyama, Minamimaki, Minamisaku, 384-1305Japan
K. Kawaguchi
Affiliation:
Department of Chemistry, Okayama University, Tsushima-naka 3-1-1, Okayama, 700-8530Japan
T Takano
Affiliation:
Graduate School of Science and Technology, Chiba University, Yayoi-cho 1-33, Inage-ku, Chiba, 263-8522Japan
P. Schilke
Affiliation:
MPIfR, Auf dem Hügel 69, D-53121 Bonn, Germany
G. Winnewisser
Affiliation:
I. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany

Abstract

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A systematically peculiar molecular composition has been found in a nearby starburst galaxy M 82. Molecules related to grain surface formation and to production reactions favorable at high-temperature are deficient in M 82 among nearby galaxies with rich gas. These molecules are SO, SiO, NH3, HNCO, CH3OH, and CH3CN. Possible reasons for this peculiarity are discussed.

Type
I. Joint Discussions
Information
Highlights of Astronomy , Volume 13 , 2005 , pp. 875 - 878
Copyright
Copyright © Astronomical Society of Pacific 2005

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