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Multifrequency survey of the intergalactic cloud in the M96 groupThe intergalactic cloud of neutral hydrogen in the M96 group are examined for signs of emission over a wide range of frequencies, from radio waves to X rays. Past or present stellar activity in the gas might have been expected to produce detectable visual infrared, CO, OH, or radio recombination-line emission. None was detected. The limits are used to study physical conditions in the intergalactic gas. In particular, B and V band limits on starlight and IRAS limits on the presence of dust strongly constrain the presence of stars or stellar by-products. However, given the uncertainties about physical conditions in the intergalactic environment, it is difficult to rule out entirely the presence of stellar-processed materials. Results of neutral hydrogen mapping from a large-scale survey of the intergalactic cloud and surrounding region are also presented. These observations confirm that the gas is confined to a large ringlike structure. The simplest interpretation remains that the intergalactic gas in Leo is primordial.
Document ID
19890043883
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Schneider, Stephen E.
(Massachusetts Univ. Amherst, MA, United States)
Skrutskie, M. F.
(Massachusetts, University Amherst, United States)
Hacking, Perry B.
(California Institute of Technology Pasadena, United States)
Young, Judith S.
(Massachusetts Univ. Amherst, MA, United States)
Dickman, Robert L.
(Five College Radio Astronomy Observatory; Massachusetts, University Amherst, United States)
Date Acquired
August 14, 2013
Publication Date
March 1, 1989
Publication Information
Publication: Astronomical Journal
Volume: 97
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
89A31254
Funding Number(s)
CONTRACT_GRANT: NSF AST-85-12903
CONTRACT_GRANT: NSF AST-84-15162
CONTRACT_GRANT: JPL-954603
CONTRACT_GRANT: NSF AST-87-14475
Distribution Limits
Public
Copyright
Other

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