Please use this identifier to cite or link to this item:
Title: Multifield, multifrequency bosonic stars and a stabilization mechanism
Author: Sanchis-Gual, Nicolas
Di Giovanni, Fabrizio
Herdeiro, Carlos
Radu, Eugen
Font, José A.
Issue Date: 17-Jun-2021
Publisher: American Physical Society
Abstract: Scalar bosonic stars (BSs) stand out as a multipurpose model of exotic compact objects. We enlarge the landscape of such (asymptotically flat, stationary, everywhere regular) objects by considering multiple fields (possibly) with different frequencies. This allows for new morphologies and a stabilization mechanism for different sorts of unstable BSs. First, any odd number of complex fields, yields a continuous family of BSs departing from the spherical, equal frequency, ℓ-BSs. As the simplest illustration, we construct the ℓ=1 BSs family, that includes several single-frequency solutions, including even parity (such as spinning BSs and a toroidal, static BS) and odd parity (a dipole BS) limits. Second, these limiting solutions are dynamically unstable, but can be stabilized by a hybrid-ℓ construction: adding a sufficiently large fundamental ℓ=0 BS of another field, with a different frequency. Evidence for this dynamical robustness is obtained by nonlinear numerical simulations of the corresponding Einstein-(complex, massive) Klein-Gordon system, both in formation and evolution scenarios, and a suggestive correlation between stability and energy distribution is observed. Similarities and differences with vector BSs are anticipated.
Peer review: yes
DOI: 10.1103/PhysRevLett.126.241105
ISSN: 0031-9007
Appears in Collections:CIDMA - Artigos
DMat - Artigos
GGDG - Artigos

Files in This Item:
File Description SizeFormat 
PRL126(2021)241105.pdf2.41 MBAdobe PDFView/Open

Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.