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Title: Hydrogen axion star: metallic hydrogen bound to a QCD axion BEC

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [1];  [1]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Physics

As a cold dark matter candidate, the QCD axion may form Bose-Einstein condensates, called axion stars, with masses around 10-11M⊙ . In this paper, we point out that a brand new astrophysical object, a Hydrogen Axion Star (HAS), may well be formed by ordinary baryonic matter becoming gravitationally bound to an axion star. Here, we study the properties of the HAS and nd that the hydrogen cloud has a high pressure and temperature in the center and is likely in the liquid metallic hydrogen state. Because of the high particle number densities for both the axion star and the hydrogen cloud, the feeble interaction between axion and hydrogen can still generate enough internal power, around 1013W (ma/=5 meV)4, to make these objects luminous point sources. Furthermore, high resolution ultraviolet, optical and infrared telescopes can discover HAS via black-body radiation.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-95ER40896
OSTI ID:
1368035
Journal Information:
Journal of High Energy Physics (Online), Vol. 2016, Issue 12; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (6)

Femtolensing by dark matter revisited journal December 2018
Acoustic modes of pulsating axion stars: Nonradial oscillations journal July 2019
Structure Formation and Microlensing with Axion Miniclusters text January 2017
Phase transitions between dilute and dense axion stars text January 2017
Axion Cosmology with Early Matter Domination text January 2018
Axion Miniclusters in Modified Cosmological Histories text January 2018