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Title:
Neutral hydrogen observations at the VLA
Authors:
van Gorkom, J.; Kotanyi, C.
Affiliation:
AA(National Radio Astronomy Observatory, Socorro, NM), AB(National Radio Astronomy Observatory, Socorro, NM)
Publication:
IN: ESO Workshop on the Virgo Cluster of Galaxies, Garching, West Germany, September 4-7, 1984, Proceedings (A86-37351 17-90). Garching, West Germany, European Southern Observatory, 1985, p. 61-66.
Publication Date:
00/1985
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
HYDROGEN CLOUDS, NEUTRAL GASES, RADIO ASTRONOMY, SPIRAL GALAXIES, VIRGO GALACTIC CLUSTER, GALACTIC STRUCTURE, H LINES
Bibliographic Code:
1985ESOC...20...61V

Abstract

Some of the preliminary VLA data from a survey of the neutral hydrogen line emissions from 25 bright spiral galaxies in the Virgo cluster, performed in the summers of 1982 and 1983, are discussed. The total bandwidth was 640 km/s, the radial velocity resolution was 20 km/s, and the angular resolution was about 40 arcsec. NGC appears heavily stripped with a disk that may be warped in the outer region, and the gas distribution is asymmetric in a way similar to NGC 4388. It is suggested that NGC 4254's optical asymmetry, and that of it's H I envelope, are mostly due to stripping. NGC 4569 appears to be a galaxy aneamic in the outer regions and normal inside, and NGC 4694 shows an anomalously high amount of H I gas for its hubble type. The H I diameters of this group are seen to be systematically smaller within a radius of about 3 deg relative to those outside, possibly due to a type segregation with radius within the cluster.
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