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CO observations of Arp's interacting galaxies

  • Yoshiaki Sofue (a1), Ken-Ichi Wakamatsu (a2), Yoshiaki Taniguchi (a1), Naomasa Nakai (a3) and Toshihiro Handa (a1)...

Abstract

A number of starburst galaxies are included in the Atlas of Peculiar Galaxies (Arp 1966) which is the collection of peculiar-morphology galaxies showing mutual tidal interaction. A scenario of starburst can be summarized as follows (e.g. Sofue 1987, Noguchi 1988). Tidal interaction between galaxies causes an oval disturbance in the gravitational potential of a galaxy. The oval disturbance causes a bar in the innermost region of the galaxy. By this bar a galactic shock wave is excited, which results in rapid accretion of gas toward the central region. The accreted gas produces a dense ring or a core of molecular gas in the central region, from which massive stars are born. Intense UV radiation from the stars heats dust in the dense molecular gas core/ring, and the dust emits strong FIR emission.

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Copyright

References

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Arp, H. (1966), Atlas of Peculiar Galaxies. (Calif. Inst. Tech.) p.48.
Noguchi, M. (1988), Astron. Astrophys. 203, 259.
Sofue, Y. (1987), Galactic and Extragalactic Star Formation , Pudritz, R. (ed.). (Reidel: Dordrecht), p. 409.

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