NGC 4438: Ram pressure sweeping of a tidally disrupted galaxy

Details NGC 4438: Ram pressure sweeping of a tidally disrupted galaxy NGC 4438: Ram pressure sweeping of a tidally disrupted galaxy

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3084..214h&link_type=abstract

In NASA, Ames Research Center, The Interstellar Medium in External Galaxies: Summaries of Contributed Papers p 214-216 (SEE N91-

Physics

Elliptical Galaxies, Galactic Clusters, Galaxies, Hydrogen, Intergalactic Media, Microwave Emission, Neutral Gases, Virgo Galactic Cluster, Confinement, Very Large Array (Vla)

Scientific paper

NGC 4438 is the highly HI deficient peculiar spiral in the center of the Virgo cluster. Observations are given of the neutral hydrogen emission obtained with the Very Large Array (VLA) in the D-array configuration. These observations map out the total HI as determined from single dish measurements, and show the hydrogen to be confined to a region about one third the size of the optical disk and displaced to the side of the galaxy opposite M87. The hydrogen content of the galaxy is over an order of magnitude less than that expected for a galaxy of its type. The data suggest that the HI deficiency is a result of ram pressure stripping of the gas in the outer regions of the galaxy by the hot intracluster medium after being tidally perturbed.

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