Cerenkov radiation and scalar stars

Citation
S. Capozziello et al., Cerenkov radiation and scalar stars, CLASS QUANT, 17(16), 2000, pp. 3171-3181
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
CLASSICAL AND QUANTUM GRAVITY
ISSN journal
0264-9381 → ACNP
Volume
17
Issue
16
Year of publication
2000
Pages
3171 - 3181
Database
ISI
SICI code
0264-9381(20000821)17:16<3171:CRASS>2.0.ZU;2-X
Abstract
We explore the possibility that a charged particle moving in the gravitatio nal field generated by a scalar star could radiate energy via a recently pr oposed gravitational Cerenkov mechanism. We prove numerically that this is not possible for stable boson stars. We also show that soliton stars could have Cerenkov radiation for particular values of the boson mass. although t he diluteness of the star grows and actual observational possibility decrea ses for the more usually discussed boson masses. These conclusions diminish , although do not completely rule out, the observational possibility of act ually detecting scalar stars using this mechanism, and lead us to consider other forms, such as gravitational lensing.