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Deep Fabry-Perot Imaging of NGC 6240: Kinematic Evidence for Merging Galaxies

Published online by Cambridge University Press:  12 April 2016

J. Bland Hawthorn ,
A. S. Wilson  and
R. B. Tully
J. Bland Hawthorn
Affiliation:
Dept. of Space Physics and Astronomy, Rice University, Houston, TX 77251-1892
A. S. Wilson
Affiliation:
Astronomy Program, University of Maryland, College Park, MD 20742
R. B. Tully
Affiliation:
Institute for Astronomy, Honolulu, Hawaii 96822

Abstract

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We have observed the superluminous, infrared galaxy NGC 6240 (z = 0.025) at Ha with the Hawaii Imaging Fabry-Perot Interferometer (HIFI – Bland and Tully 1989). During the past decade, observational evidence from all wavebands indicates that the unusual appearance of NGC 6240 has resulted from a collision between two gas-rich systems, a view which is supported by our spectrophotometnc data. However, the origin of the enormous infrared luminosity (4 × 1011 L0) detected by IRAS remains highly controversial, where opinions differ on the relative roles of large-scale shocks, massive star formation or a buried “active” nucleus. These mechanisms are discussed in the light of our Fabry-Perot observations.

Type
V. Observations of Nuclear and Near-Nuclear Activity
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 445 - 449
Copyright
Copyright © NASA 1990

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