Aperture-synthesis observations of H I in the galaxy M82
Journal Article
·
· Astrophys. J.; (United States)
Maps of neutral hydrogen emission in the irregular galaxy M82 were obtained with a spatial resolution of 1' and a velocity resolution of 10.55 km s/sup -1/. A velocity map with spatial resolution of 1.5' was also constructed. These maps reveal a close association of the H I with optical features, including the filaments extending from the nucleus along the galaxy minor axis. A bar of H I at the east end of the major axis of M82 was found which may be due to interaction with M81. The H I distribution and velocities agree quite well with CO data near the nucleus of M82; however, both the systemic velocity of M82 and the velocity gradient determined from the radio data disagree with optically measured values. As much as 50% of the mass of M82 may be interstellar, and active star formation seems likely. 5 figures.
- Research Organization:
- Univ. of Illinois, Urbana
- OSTI ID:
- 6208131
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 225:3; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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