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High velocity clouds in nearby disk galaxiesClouds of neutral hydrogen in our galaxy with the absolute value of v greater than 100 km/s cover approximately 10 percent of the sky to a limiting column density of 1 x 10(exp 18) cm(exp -2). These high velocity clouds (HVCs) may dominate the kinetic energy of neutral hydrogen in non-circular motion, and are an important though poorly understood component of galactic gas. It has been suggested that the HVCs can be reproduced by a combination of three phenomena: a galactic fountain driven by disk supernovae which would account for most of the HVCs, material tidally torn from the Magellanic Clouds, and an outer arm complex which is associated with the large scale structure of the warped galactic disk. We sought to detect HVCs in external galaxies in order to test the galactic fountain model.
Document ID
19930017615
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Schulman, Eric (Michigan Univ. Ann Arbor, MI, United States)
Bregman, Joel N. (Michigan Univ. Ann Arbor, MI, United States)
Roberts, Morton S. (National Radio Astronomy Observatory Socorro, NM., United States)
Brinks, Elias (National Radio Astronomy Observatory Socorro, NM., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: NASA. Ames Research Center, The Evolution of Galaxies and Their Environment
Subject Category
Astrophysics
Accession Number
93N26804
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19930017517Collected WorksThe Evolution of Galaxies and Their Environment
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