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Self-gravitating system made of axions

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons4303

Barranco,  J.
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons4340

Bernal,  A.
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

Externe Ressourcen
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Volltexte (frei zugänglich)

1001.1769
(Preprint), 214KB

PRD043525.pdf
(beliebiger Volltext), 272KB

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Zitation

Barranco, J., & Bernal, A. (2011). Self-gravitating system made of axions. Physical Review D, 84(4): 043525. doi:10.1103/PhysRevD.83.043525.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0012-BD27-4
Zusammenfassung
We show that the inclusion of an axion-like effective potential in the construction of a self-gravitating system made of scalar fields leads to a decrease on 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 f_a, 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 radius of few meters, then, the self-gravitating system made of axions could play the role of scalar mini-machos that are mimicking a cold dark matter model for the galactic halo.