Scaling relations of the slightly self-interacting cold dark matter in galaxies and clusters
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AbstractRecent observations in galaxies and clusters indicate that dark matter density profiles exhibit core-like structures which contradict the numerical simulation results of collisionless cold dark matter. The idea of self-interacting cold dark matter (SICDM) has been invoked to solve the discrepancies between the observations and numerical simulations. In this paper, I derive some important scaling relations in galaxies and clusters by using the long-range SICDM model. These scaling relations give good agreement with the empirical fittings from observational data in galaxies and clusters if the dark matter particles are only slightly self-interacting. Also, there may exist a universal critical optical depth tau(c) that characterizes the core-like structures. These results generally support the idea of the SICDM to tackle the long-lasting dark matter problem.
All Author(s) ListChan MH
Journal nameMonthly Notices of the Royal Astronomical Society
Volume Number433
Issue Number3
PublisherOxford University Press (OUP): Policy P - Oxford Open Option A
Pages2310 - 2313
LanguagesEnglish-United Kingdom
Keywordsdark matter
Web of Science Subject CategoriesAstronomy & Astrophysics; ASTRONOMY & ASTROPHYSICS

Last updated on 2020-20-10 at 01:18