Inverse-chirp signals and spontaneous scalarisation with self-interacting potentials in stellar collapse
Abstract
We study how the gravitational wave signal from stellar collapse in scalar-tensor gravity varies under the influence of scalar self-interaction. To this end, we extract the gravitational radiation from numerical simulations of stellar collapse for a range of potentials with higher-order terms in addition to the quadratic mass term. Our study includes collapse to neutron stars and black holes and we find the strong inverse-chirp signals obtained for the purely quadratic potential to be exceptionally robust under changes in the potential at higher orders; quartic and sextic terms in the potential lead to noticeable differences in the wave signal only if their contribution is amplified, implying a relative fine-tuning to within five or more orders of magnitude between the mass and self-interaction parameters.
Additional Information
© 2019 IOP Publishing Ltd. Received 22 March 2019, revised 3 May 2019; Accepted for publication 29 May 2019; Published 18 June 2019. We thank Davide Gerosa, David Hilditch, and Christian Ott for helpful discussions. This work was supported by the European Union's H2020 ERC Consolidator Grant 'Matter and strong-field gravity: new frontiers in Einstein's theory' grant agreement no. MaGRaTh–646597 funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 690904, the COST Action Grant No. CA16104, from STFC Consolidator Grant No. ST/P000673/1, the SDSC Comet and TACC Stampede2 clusters through NSF-XSEDE Award Nos. PHY-090003, and Cambridge's CSD3 system system through STFC capital grants ST/P002307/1 and ST/R002452/1 and STFC operations grant ST/R00689X/1. RR-M acknowledges support by a STFC studentship.Attached Files
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Additional details
- Eprint ID
- 96497
- DOI
- 10.1088/1361-6382/ab256f
- Resolver ID
- CaltechAUTHORS:20190618-102936374
- European Research Council (ERC)
- 646597
- Marie Curie Fellowship
- 690904
- European Cooperation in Science and Technology
- CA16104
- Science and Technology Facilities Council (STFC)
- ST/P000673/1
- NSF
- PHY-090003
- Science and Technology Facilities Council (STFC)
- ST/P002307/1
- Science and Technology Facilities Council (STFC)
- ST/R002452/1
- Science and Technology Facilities Council (STFC)
- ST/R00689X/1
- Created
-
2019-06-18Created from EPrint's datestamp field
- Updated
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2022-07-12Created from EPrint's last_modified field