Shallow cores in the dark matter halos: self-interaction in action?

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dc.creatorAvila-Reese, V.
dc.creatorFirmani, C.
dc.creatorD'Onghia, E.
dc.creatorHernandez, X.
dc.date2000-07-10
dc.date.accessioned2026-07-07T01:54:19Z
dc.date.available2026-07-07T01:54:19Z
dc.descriptionUsing observational data for a sample of dark matter dominated galaxies and two cluster of galaxies, we have found that the central halo density does not depend on its mass, and the core radius is roughly proportional to the maximum rotation velocity. A good agreement with these scaling laws is obtained for CDM halos whose dense inner parts were expanded by gravothermal instabilities if the particles efficiently self-interact only in these parts. We find that the particle cross-section is inversely proportional to the velocity dispersion.
dc.descriptionTo appear in "The Seventh Texas-Mexico Conference on Astrophysics: Flows, Blows, and Glows" (April 2000), eds. W. Lee & S. Torres-Peimbert, RevMexAA (Serie de Conferencias), in press. 4 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/astro-ph/0007120
dc.identifierhttp://arxiv.org/abs/astro-ph/0007120
dc.identifierRevMexAA Serie de Conferencias, 10, p. 130-133 (2001)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/1303
dc.subjectAstrophysics
dc.titleShallow cores in the dark matter halos: self-interaction in action?
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