Scaling relations of the slightly self-interacting cold dark matter in galaxies and clusters

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5 Citations (Scopus)

Abstract

Recent 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 τc that characterizes the core-like structures. These results generally support the idea of the SICDM to tackle the long-lasting dark matter problem. Copyright © 2013 The Author.
Original languageEnglish
Pages (from-to)2310-2313
JournalMonthly Notices of the Royal Astronomical Society
Volume433
Issue number3
Early online dateJun 2013
DOIs
Publication statusPublished - Aug 2013

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dark matter
galaxies
scaling
cold
optical thickness
optical depth
simulation
profiles

Citation

Chan, M. H. (2013). Scaling relations of the slightly self-interacting cold dark matter in galaxies and clusters. Monthly Notices of the Royal Astronomical Society, 433(3), 2310-2313. doi: 10.1093/mnras/stt897

Keywords

  • Dark matter