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shedding light on baryonic dark matterHalo dark matter, if it is baryonic, may plausibly consist of compact stellar remnants. Jeans mass clouds containing 10 to the 6th to 10 to the 8th solar masses could have efficiently formed stars in the early universe and could plausibly have generated, for a suitably top-heavy stellar initial mass function, a high abundance of neutron stars as well as a small admixture of long-lived low mass stars. Within the resulting clusters of dark remnants, which eventually are tidally disrupted when halos eventually form, captures of neutron stars by nondegenerate stars resulted in formation of close binaries. These evolve to produce, by the present epoch, an observable X-ray signal associated with dark matter aggregations in galaxy cluster cores.
Document ID
Document Type
Reprint (Version printed in journal)
Silk, Joseph
(California, University Berkeley; Mount Stromlo and Siding Spring Observatories, Canberra, Australia)
Date Acquired
August 14, 2013
Publication Date
February 1, 1991
Publication Information
Publication: Science
Volume: 251
ISSN: 0036-8075
Subject Category
Distribution Limits