Regular scalar field around reflecting stars and black holes, and reflecting star polarization

The existence of a regular non-trivial scalar field in the background of an asymptotically flat static reflecting star is discussed. The scalar field is assumed to be conformally coupled to the outside matter. The induced scalar charge is determined and the required conditions to have regular field...

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Bibliographic Details
Published inJournal of cosmology and astroparticle physics Vol. 2019; no. 12; p. 5
Main Authors Sadjadi, H. Mohseni, Khodaei, M.
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.12.2019
Subjects
Black holes
Expanding universe theory
Scalars
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Summary:The existence of a regular non-trivial scalar field in the background of an asymptotically flat static reflecting star is discussed. The scalar field is assumed to be conformally coupled to the outside matter. The induced scalar charge is determined and the required conditions to have regular field are obtained. The results are compared with the case of a black hole. Conditions to have regular non-trivial scalar field out of the black hole horizon are investigated. We show that in the presence of a scalar source, in contrast to the black holes, the reflecting star becomes polarized.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2019/12/005