A tight scaling relation of dark matter in galaxy clusters
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AbstractRecent studies in different types of galaxies reveal that the product of the central density and the core radius (rho(c)r(c)) is a constant. However, some empirical studies involving galaxy clusters suggest that the product rho(c)r(c) depends weakly on the total dark halo mass. In this Letter, we re-analyse the hot gas data from 106 clusters and obtain a surprisingly tight scaling relation: rho(c) alpha r(c)(-1.46 +/- 0.16). This result generally agrees with the claims that rho(c)r(c) is not a constant for all scales of structure. Moreover, this relation does not support the velocity-dependent cross-section of dark matter if the core formation is due to the self-interaction of dark matter.
All Author(s) ListChan MH
Journal nameMonthly Notices of the Royal Astronomical Society
Volume Number442
Issue Number1
PublisherOxford University Press (OUP): Policy P - Oxford Open Option A
PagesL14 - L17
LanguagesEnglish-United Kingdom
Keywordsgalaxies: clusters: general
Web of Science Subject CategoriesAstronomy & Astrophysics

Last updated on 2020-10-08 at 02:05