Gravitational wave emission from collisions of compact scalar solitons
Abstract
We numerically investigate the gravitational waves generated by the head-on collision of equal-mass, self-gravitating, real scalar field solitons (oscillatons) as a function of their compactness $$C$$. We show that there exist three different possible outcomes for such collisions: (1) an excited stable oscillaton for low $$C$$, (2) a merger and formation of a black-hole for intermediate $$C$$, and (3) a pre-merger collapse of both oscillatons into individual black-holes for large $$C$$. For (1), the excited, aspherical oscillaton continues to emit gravitational waves. For (2), the total energy in gravitational waves emitted increases with compactness, and possesses a maximum which is greater than that from the merger of a pair of equivalent mass black-holes. The initial amplitudes of the quasi-normal modes in the post-merger ring-down in this case are larger than that of corresponding mass black-holes -- potentially a key observable to distinguish black-hole mergers with their scalar mimics. For (3), the gravitational wave output is indistinguishable from a similar mass, black-hole--black-hole merger. Based on these results, LIGO may be sensitive to oscillaton collisions from light scalars of mass 10-12 eV $$\lesssim$$ m $$\lesssim$$ 10-10 eV.
- Authors:
-
- Kings College London (United Kingdom)
- Rice Univ., Houston, TX (United States)
- Publication Date:
- Research Org.:
- Rice Univ., Houston, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1594807
- Alternate Identifier(s):
- OSTI ID: 1546169; OSTI ID: 1594800
- Grant/Contract Number:
- SC0018216
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 4; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Classical black holes; Fluids & classical fields in curved spacetime; Gravitational wave sources; Gravitational waves; Binary stars; Stars; Numerical relativity; Numerical simulations in gravitation & astrophysics
Citation Formats
Helfer, Thomas, Lim, Eugene A., Garcia, Marcos A. G., and Amin, Mustafa A. Gravitational wave emission from collisions of compact scalar solitons. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.99.044046.
Helfer, Thomas, Lim, Eugene A., Garcia, Marcos A. G., & Amin, Mustafa A. Gravitational wave emission from collisions of compact scalar solitons. United States. https://doi.org/10.1103/PhysRevD.99.044046
Helfer, Thomas, Lim, Eugene A., Garcia, Marcos A. G., and Amin, Mustafa A. Tue .
"Gravitational wave emission from collisions of compact scalar solitons". United States. https://doi.org/10.1103/PhysRevD.99.044046. https://www.osti.gov/servlets/purl/1594807.
@article{osti_1594807,
title = {Gravitational wave emission from collisions of compact scalar solitons},
author = {Helfer, Thomas and Lim, Eugene A. and Garcia, Marcos A. G. and Amin, Mustafa A.},
abstractNote = {We numerically investigate the gravitational waves generated by the head-on collision of equal-mass, self-gravitating, real scalar field solitons (oscillatons) as a function of their compactness $C$. We show that there exist three different possible outcomes for such collisions: (1) an excited stable oscillaton for low $C$, (2) a merger and formation of a black-hole for intermediate $C$, and (3) a pre-merger collapse of both oscillatons into individual black-holes for large $C$. For (1), the excited, aspherical oscillaton continues to emit gravitational waves. For (2), the total energy in gravitational waves emitted increases with compactness, and possesses a maximum which is greater than that from the merger of a pair of equivalent mass black-holes. The initial amplitudes of the quasi-normal modes in the post-merger ring-down in this case are larger than that of corresponding mass black-holes -- potentially a key observable to distinguish black-hole mergers with their scalar mimics. For (3), the gravitational wave output is indistinguishable from a similar mass, black-hole--black-hole merger. Based on these results, LIGO may be sensitive to oscillaton collisions from light scalars of mass 10-12 eV $\lesssim$ m $\lesssim$ 10-10 eV.},
doi = {10.1103/PhysRevD.99.044046},
journal = {Physical Review D},
number = 4,
volume = 99,
place = {United States},
year = {Tue Feb 26 00:00:00 EST 2019},
month = {Tue Feb 26 00:00:00 EST 2019}
}
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