Accession Number:

AD0757688

Title:

Neutral Hydrogen Aperture Synthesis Maps of IC2574 and NGC 7640,

Descriptive Note:

Corporate Author:

OWENS VALLEY RADIO OBSERVATORY PASADENA CALIF

Personal Author(s):

Report Date:

1973-01-01

Pagination or Media Count:

22.0

Abstract:

Aperture synthesis observations with an angular resolution about 2 arc-min of two late-type galaxies have revealed HI distributions some 1.5 times larger than their photographic images. IC2574, classified as an irregular galaxy, has a well organized velocity field typical of a late spiral galaxy. The major HI concentrations do not correspond with the brightest optical features. A ridge of peculiar velocities of about 10 kms in the region of the optical bar may indicate streaming motions of gas along the bar. NGC7640 is an SBc galaxy at an inclination of 77 degrees. There is no evidence of any HI halo brighter than 100 degrees K kms, although there is a suggestion of warping of the plane of the HI layer. Author

Subject Categories:

  • Astrophysics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE