Plasma constraints on the cosmological abundance of magnetic monopoles and the origin of cosmic magnetic fields / Medvedev Mikhail V.,Loeb Abraham // JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS. - 2017. - V. , l. 6.

ISSN/EISSN:

1475-7516 / нет данных

Type:

Article

Abstract:

Existing theoretical and observational constraints on the abundance of magnetic monopoles are limited. Here we demonstrate that an ensemble of monopoles forms a plasma whose properties are well determined and whose collective effects place new tight constraints on the cosmological abundance of monopoles. In particular, the existence of micro-Gauss magnetic fields in galaxy clusters and radio relics implies that the scales of these structures are below the Debye screening length, thus setting an upper limit on the cosmological density parameter of monopoles, Omega(M) less than or similar to 3 x 10(-4), which precludes them from being the dark matter. Future detection of Gpc-scale coherent magnetic fields could improve this limit by a few orders of magnitude. In addition, we predict the existence of magnetic Langmuir waves and turbulence which may appear on the sky as ``zebra patterns{''} of an alternating magnetic field with k.B not equal 0. We also show that magnetic monopole Langmuir turbulence excited near the accretion shock of galaxy clusters may be an efficient mechanism for generating the observed intracluster magnetic fields.

Author keywords:

extragalactic magnetic fields; galaxy clusters SPECTRUM; SEARCHES; CLUSTER

DOI:

10.1088/1475-7516/2017/06/058

Web of Science ID:

ISI:000408310600028

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JUN
Publisher	IOP PUBLISHING LTD
Address	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	058
Keywords-Plus	SPECTRUM; SEARCHES; CLUSTER
Research-Areas	Astronomy \& Astrophysics; Physics
Web-of-Science-Categories	Astronomy \& Astrophysics; Physics, Particles \& Fields
Author-Email	mmedvedev@cfa.harvard.edu aloeb@cfa.harvard.edu
Funding-Acknowledgement	Institute for Theory and Computation at Harvard University; Black Hole Initiative; Templeton Foundation; {[}DE-SC0016368]
Funding-Text	MM is grateful to the Institute for Theory and Computation at Harvard University for support and hospitality and acknowledges partial support via grant DE-SC0016368. This work was supported in part by the Black Hole Initiative, which is funded by a grant from the Templeton Foundation.
Number-of-Cited-References	29
Journal-ISO	J. Cosmol. Astropart. Phys.
Doc-Delivery-Number	FE6HM