Aperture synthesis study of neutral hydrogen in the galaxy M101: I. Observations.
Abstract
Synthesis observations of neutral hydrogen emission in the spiral galaxy M 101 obtained with the Owens Valley twin-element interferometer are presented. The spatial resolution is 4' of arc; and the velocity resolution is 21 km -i The observations are given in the form of contour maps of the integral and the mean velocity of the H I proffle at each position in the galaxy, and a line profile for the galaxy as a whole. A contour map of the 21 cm continuum radiation is also presented. Key words: galaxies - hydrogen
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1971
- Bibcode:
- 1971A&A....13...99R