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http://hdl.handle.net/10773/36534
Title: | Impact of the wavelike nature of Proca stars on their gravitational-wave emission |
Author: | Sanchis-Gual, Nicolas Calderón Bustillo, Juan Herdeiro, Carlos Radu, Eugen Font, José A. Leong, Samson H. W. Torres-Forné, Alejandro |
Issue Date: | 15-Dec-2022 |
Publisher: | American Physical Society |
Abstract: | We present a systematic study of the dynamics and gravitational-wave emission of head-on collisions of spinning vector boson stars, known as Proca stars. To this aim we build a catalogue of about 800 numerical-relativity simulations of such systems. We find that the wave-like nature of bosonic stars has a large impact on the gravitational-wave emission. In particular, we show that the initial relative phase $\Delta \epsilon =\epsilon_1-\epsilon_2$ of the two complex fields forming the stars (or equivalently, the relative phase at merger) strongly impacts both the emitted gravitational-wave energy and the corresponding mode structure. This leads to a non-monotonic dependence of the emission on the frequency of the secondary star $\omega_2$, for fixed frequency $\omega_1$ of the primary. This phenomenology, which has not been found for the case of black-hole mergers, reflects the distinct ability of the Proca field to interact with itself in both constructive and destructive manners. We postulate this may serve as a smoking gun to shed light on the possible existence of these objects. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/36534 |
DOI: | 10.1103/PhysRevD.106.124011 |
ISSN: | 1550-7998 |
Appears in Collections: | CIDMA - Artigos DMat - Artigos GGDG - Artigos |
Files in This Item:
File | Description | Size | Format | |
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PRD106(2022)124011.pdf | 4.47 MB | Adobe PDF | View/Open |
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