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Investigating the evolution of merger remnants from the formation of gas disks

Published online by Cambridge University Press:  09 February 2015

Junko Ueda ,
Daisuke Iono ,
Min S. Yun ,
Alison F. Crocker ,
Desika Narayanan ,
Shinya Komugi ,
Daniel Espada ,
Bunyo Hatsukade ,
Hiroyuki Kaneko  and
Yuichi Matsuda
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Junko Ueda
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka,Tokyo, 181-8588, Japan email: [email protected] Department of Astronomy, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo133-0033, Japan Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA02138, USA
Daisuke Iono
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka,Tokyo, 181-8588, Japan email: [email protected] Department of Astronomical Science, The Graduate University for Advanced Studie (SOKENDAI), 2-21-1Osawa, Mitaka, Tokyo181-8588, Japan
Min S. Yun
Affiliation:
Department of Astronomy, University of Massachusetts, Amherst, MA01003, USA
Alison F. Crocker
Affiliation:
Ritter Astrophysical Research Center, University of Toledo, Toledo, OH43606, USA
Desika Narayanan
Affiliation:
Department of Astronomy, Haverford College, 370 Lancaster Ave, Haverford, PA19041, USA
Shinya Komugi
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka,Tokyo, 181-8588, Japan email: [email protected]
Daniel Espada
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka,Tokyo, 181-8588, Japan email: [email protected] Joint ALMA Observatory, Alonso de Córdova 3107, Vitacura, Santiago763-0355, Chile
Bunyo Hatsukade
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka,Tokyo, 181-8588, Japan email: [email protected]
Hiroyuki Kaneko
Affiliation:
Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki305-8577, Japan
Yuichi Matsuda
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka,Tokyo, 181-8588, Japan email: [email protected]
Yoichi Tamura
Affiliation:
IoA, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo, 181-0015, Japan
David J. Wilner
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA02138, USA
Ryohei Kawabe
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka,Tokyo, 181-8588, Japan email: [email protected] Department of Astronomy, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo133-0033, Japan Department of Astronomical Science, The Graduate University for Advanced Studie (SOKENDAI), 2-21-1Osawa, Mitaka, Tokyo181-8588, Japan
Hsi-An Pan
Affiliation:
Department of Astronomical Science, The Graduate University for Advanced Studie (SOKENDAI), 2-21-1Osawa, Mitaka, Tokyo181-8588, Japan Nobeyama Radio Observatory, 462-2 Minamimaki, Minamisaku, Nagano384-1305, Japan Dept. of Physics, Faculty of Science, Hokkaido Univ., Kita-ku, Sapporo060-0810, Japan
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Abstract

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Our new compilation of interferometric CO data suggests that nuclear and extended molecular gas disks are common in the final stages of mergers. Comparing the sizes of the molecular gas disk and gas mass fractions to early-type and late-type galaxies, about half of the sample show similar properties to early-type galaxies, which have compact gas disks and low gas mass fractions. We also find that sources with extended gas disks and large gas mass fractions may become disk-dominated galaxies.

Keywords

galaxies: evolution - galaxies: formation - galaxies: interactions - galaxies: ISM - galaxies: kinematics and dynamics - radio lines: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S309: Galaxies in 3D across the Universe , July 2014 , pp. 283 - 284
Copyright
Copyright © International Astronomical Union 2015 

References

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