Skip to main content

Research Repository

Advanced Search

Using the Milky Way satellites to study interactions between cold dark matter and radiation

Boehm, C.; Schewtschenko, J.A.; Wilkinson, R.J.; Baugh, C.M.; Pascoli, S.

Using the Milky Way satellites to study interactions between cold dark matter and radiation Thumbnail


Authors

C. Boehm

J.A. Schewtschenko

R.J. Wilkinson



Abstract

The cold dark matter (CDM) model faces persistent challenges on small scales. In particular, the model significantly overestimates the number of satellite galaxies around the Milky Way. Attempts to solve this problem remain controversial and have even led some to abandon CDM altogether. However, current simulations are limited by the assumption that dark matter feels only gravity. Here we show that including interactions between CDM and radiation (photons or neutrinos) leads to a dramatic reduction in the number of satellite galaxies, providing a potential solution to the Milky Way satellite problem and indicating that physics beyond gravity may be essential to make accurate predictions of structure formation on small scales. The methodology introduced here gives constraints on dark matter interactions that are significantly improved over those from the cosmic microwave background.

Citation

Boehm, C., Schewtschenko, J., Wilkinson, R., Baugh, C., & Pascoli, S. (2014). Using the Milky Way satellites to study interactions between cold dark matter and radiation. Monthly Notices of the Royal Astronomical Society: Letters, 445(1), L31-L35. https://doi.org/10.1093/mnrasl/slu115

Journal Article Type Article
Acceptance Date Jul 17, 2014
Online Publication Date Sep 1, 2014
Publication Date Nov 21, 2014
Deposit Date Apr 30, 2014
Publicly Available Date May 15, 2014
Journal Monthly Notices of the Royal Astronomical Society: Letters
Electronic ISSN 1745-3933
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 445
Issue 1
Pages L31-L35
DOI https://doi.org/10.1093/mnrasl/slu115
Keywords Galaxies: abundances, Galaxies: dwarf, Dark matter, Large-scale structure of Universe.

Files


Published Journal Article (535 Kb)
PDF

Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society Letters © 2014 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.







You might also like



Downloadable Citations