Possible Evidence for Interaction-induced Star Formation in NGC 3077

Details Possible Evidence for Interaction-induced Star Formation in NGC 3077 Possible Evidence for Interaction-induced Star Formation in NGC 3077

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21334901w&link_type=abstract

American Astronomical Society, AAS Meeting #213, #349.01; Bulletin of the American Astronomical Society, Vol. 41, p.485

Astronomy and Astrophysics

Astronomy

Scientific paper

Our recent study of the star forming regions in the tidal arms of NGC 3077, a member of the well-known triplet of galaxies that includes M81 and M82, reveals a gigantic shell-like structure that suggests an earlier starburst occuring on scales comparable to the galaxy itself. More than thirty HII regions previously identified in the immediate vicinity of this structure are now linked by a coherent pattern of diffuse emission in the interstellar medium, showing a common origin of shock disturbance. We propose a model in which the gravitational interactions within the triplet not only torn away large amount of HI gas from NGC 3077's mass center, but also induce large-scale star formation over a time scale longer than a typical bursting event.

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