On purely magnetic diagonal Bianchi type VI h cosmologies

Journal article


Lozanovski, Con. (2014). On purely magnetic diagonal Bianchi type VI h cosmologies. Astrophysics and Space Science : An International Journal of Astronomy, Astrophysics and Space Science. 351(1), pp. 371 - 376. https://doi.org/10.1007/s10509-014-1841-y
AuthorsLozanovski, Con
Abstract

A class of purely magnetic diagonal Bianchi type VI h Cosmologies is investigated. If the energy-momentum tensor is specialized to that of a perfect fluid with (non-zero) heat-flux, with respect to the co-moving fluid 4-velocity, then the only solution is of Bianchi type V and un-physical. Further, it is shown that if certain metric functions are functionally related then the spacetime is conformally flat. Unfortunately, all these results (somewhat indirectly) invalidate a claim by Kumar and Srivastava of finding a non-conformally flat purely magnetic diagonal Bianchi type V cosmology. Finally, we consider non-zero anisotropic pressure in place of non-zero heat flux. It is shown that these spacetimes are necessarily Bianchi type VI 0. We highlight the fact that there is a known solution that generalizes the purely magnetic perfect fluid Wylleman-Van den Bergh spacetime. Physical properties of this solution are discussed.

Year2014
JournalAstrophysics and Space Science : An International Journal of Astronomy, Astrophysics and Space Science
Journal citation351 (1), pp. 371 - 376
PublisherSpringer Netherlands
ISSN0004-640X
Digital Object Identifier (DOI)https://doi.org/10.1007/s10509-014-1841-y
Scopus EID2-s2.0-84897576995
Page range371 - 376
Research GroupSchool of Arts
Place of publicationNetherlands
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