The 21cm Absorption Line and Axion Quark Nugget Dark Matter Model
High Energy Physics - Phenomenology
2019-03-19 v3 Cosmology and Nongalactic Astrophysics
Abstract
We argue that dark matter in the form of macroscopically large nuggets of standard model quarks and antiquarks can help to alleviate the tension between standard model cosmology and the recent EDGES observation of a stronger than anticipated 21 cm absorption feature. The effect occurs as a result of the thermal emission from quark nugget dark matter at early times and at energies well below the peak of the CMB. Similar radiation at early times may also contribute a fraction of the GHz range excess observed by ARCADE2.
Cite
@article{arxiv.1804.07340,
title = {The 21cm Absorption Line and Axion Quark Nugget Dark Matter Model},
author = {K. Lawson and A. R. Zhitnitsky},
journal= {arXiv preprint arXiv:1804.07340},
year = {2019}
}
Comments
Version accepted for publication in Physics of the Dark Universe