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

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arxiv 1907.09902 v4 pith:NFLPRCM4 submitted 2019-07-15 gr-qc

classification gr-qc
keywords scalarfieldblackreflectingregularstarconditionshole
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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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. No skyrmion hair for stationary spherically symmetric reflecting stars

    hep-th 2019-08 reject novelty 5.0 of 10

    A spherically symmetric reflecting star cannot support a nontrivial Skyrme field outside its surface, so it carries no skyrmion hair and no baryon number.

  2. Spontaneous scalarization around a black hole in a dark matter halo

    gr-qc 2026-07 reject novelty 4.0 of 10

    A Hernquist dark-matter halo is claimed to scalarize a central black hole, with the coupling quantized as η_n = −(n+1/2)²π³/(2C), but the mechanism requires ρ−p>0 while the paper's own formulas give ρ−p<0.

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