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arXiv:astro-ph/0011339 (astro-ph)
[Submitted on 17 Nov 2000]

Title:On the Origin of Faint Intracluster Starlight in Coma

Authors:Vladimir Korchagin, Toshio Tsuchiya, Shoken M. Miyama
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Abstract: Using N-body numerical simulations, we examine possible mechanisms for the origin of the intracluster starlight features recently discovered in the Coma cluster of galaxies. We show that tidal interactions of a ``normal'' elliptical galaxy with a symmetrically distributed dark matter potential do not produce the observed intracluster starlight features. A head-on collision of two normal ellipticals does, however, explain the origin of the intracluster features with surface brightness about 26 mag/arcsec$^2$). Another possible explanation for the intracluster starlight features is galactic tidal interactions with massive intracluster substructures. The presence of substructures in Coma with a density of $\sim$ 0.1 times the density in the center of the galaxy, and with a total mass about three orders of magnitude larger than the mass of a normal elliptical galaxy, would account for the observations.
Comments: 11 pages, including 5 figures / to appear in Astrophysical Journal (2001) vol. 548
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0011339
  (or arXiv:astro-ph/0011339v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0011339
Related DOI: https://doi.org/10.1086/319086

Submission history

From: Toshio Tsuchiya [view email]
[v1] Fri, 17 Nov 2000 13:58:17 UTC (480 KB)
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