Self-gravitating system made of axions

J. Barranco and A. Bernal
Phys. Rev. D 83, 043525 – Published 23 February 2011

Abstract

We show that the inclusion of an axionlike effective potential in the construction of a self-gravitating system of scalar fields decreases its compactness when the value of the self-interaction coupling constant is increased. By including the current values for the axion mass m and decay constant fa, we have computed the mass and the radius for self-gravitating systems made of axion particles. It is found that such objects will have asteroid size masses and radii of a few meters, thus a self-gravitating system made of axions could play the role of scalar mini-MACHOs and mimic a cold dark matter model for the galactic halo.

  • Figure
  • Figure
  • Figure
  • Received 12 January 2010

DOI:https://doi.org/10.1103/PhysRevD.83.043525

© 2011 American Physical Society

Authors & Affiliations

J. Barranco*

  • Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Am Mühlenberg 1, D-14476 Golm, Germany

A. Bernal

  • Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Am Mühlenberg 1, D-14476 Golm, Germany

  • *Present address: Instituto de Astronomía, Universidad Nacional Autonoma de México, Mexico, DF 04510, Mexico
  • Present address: Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A.P. 70-543, 04510 México D.F., México.

See Also

Can the dark matter halo be a collisionless ensemble of axion stars?

J. Barranco, A. Carrillo Monteverde, and D. Delepine
Phys. Rev. D 87, 103011 (2013)

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 83, Iss. 4 — 15 February 2011

Reuse & Permissions
Access Options

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×