Gravitational wave emission in binary neutron star early post-merger within a dark environment
Using an effective Lagrangian model inspired by Takami et al. [1] we qualitatively study the early post-merger of a nearly symmetric binary Neutron Star (BNS) merger event with a non-vanishing ambient fraction of dark matter. For this we first mimic the dynamics of two oscillating Neutron Star (NS)...
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| Language: | English |
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Elsevier
2025-03-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325001182 |
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| author | D. Suárez-Fontanella D. Barba-González C. Albertus M. Ángeles Pérez-García |
| author_facet | D. Suárez-Fontanella D. Barba-González C. Albertus M. Ángeles Pérez-García |
| author_sort | D. Suárez-Fontanella |
| collection | DOAJ |
| description | Using an effective Lagrangian model inspired by Takami et al. [1] we qualitatively study the early post-merger of a nearly symmetric binary Neutron Star (BNS) merger event with a non-vanishing ambient fraction of dark matter. For this we first mimic the dynamics of two oscillating Neutron Star (NS) masses in the gravitational potential well as they merge. We parametrize the dynamics and ejecta properties in the coalescence event allowing the formation of a surrounding debris disk that may be containing a non-vanishing dark matter fraction. In order to analyze the possible novel dark contribution, we start from a dark-matter free modelization as a benchmark. Using Monte Carlo Markov Chain (MCMC) techniques we approximately recover the gravitational waveforms, restricted to early post-merger time interval from existing simulations in the CoRe database. Later, we explore the impact of an additional dark viscous fluid under a prescribed velocity dependent force in the Lagrangian and obtain the resulting waveforms and some spectral features originating in the first few ms in the BNS post-merger. Finally we discuss our qualitative findings and its range of validity in light of the prospects of detectability in present or future experimental settings. |
| format | Article |
| id | doaj-art-aa52a2e161f643bf9fe4ef341bf985f4 |
| institution | DOAJ |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-aa52a2e161f643bf9fe4ef341bf985f42025-08-20T03:05:55ZengElsevierPhysics Letters B0370-26932025-03-0186213935810.1016/j.physletb.2025.139358Gravitational wave emission in binary neutron star early post-merger within a dark environmentD. Suárez-Fontanella0D. Barba-González1C. Albertus2M. Ángeles Pérez-García3Department of Fundamental Physics, University of Salamanca, Plaza de la Merced S/N, Salamanca, E-37008, SpainDepartment of Fundamental Physics, University of Salamanca, Plaza de la Merced S/N, Salamanca, E-37008, SpainDepartment of Fundamental Physics, University of Salamanca, Plaza de la Merced S/N, Salamanca, E-37008, SpainCorresponding author.; Department of Fundamental Physics, University of Salamanca, Plaza de la Merced S/N, Salamanca, E-37008, SpainUsing an effective Lagrangian model inspired by Takami et al. [1] we qualitatively study the early post-merger of a nearly symmetric binary Neutron Star (BNS) merger event with a non-vanishing ambient fraction of dark matter. For this we first mimic the dynamics of two oscillating Neutron Star (NS) masses in the gravitational potential well as they merge. We parametrize the dynamics and ejecta properties in the coalescence event allowing the formation of a surrounding debris disk that may be containing a non-vanishing dark matter fraction. In order to analyze the possible novel dark contribution, we start from a dark-matter free modelization as a benchmark. Using Monte Carlo Markov Chain (MCMC) techniques we approximately recover the gravitational waveforms, restricted to early post-merger time interval from existing simulations in the CoRe database. Later, we explore the impact of an additional dark viscous fluid under a prescribed velocity dependent force in the Lagrangian and obtain the resulting waveforms and some spectral features originating in the first few ms in the BNS post-merger. Finally we discuss our qualitative findings and its range of validity in light of the prospects of detectability in present or future experimental settings.http://www.sciencedirect.com/science/article/pii/S0370269325001182Dark matterEffective LagrangianGravitational wavesBinary neutron star merger |
| spellingShingle | D. Suárez-Fontanella D. Barba-González C. Albertus M. Ángeles Pérez-García Gravitational wave emission in binary neutron star early post-merger within a dark environment Physics Letters B Dark matter Effective Lagrangian Gravitational waves Binary neutron star merger |
| title | Gravitational wave emission in binary neutron star early post-merger within a dark environment |
| title_full | Gravitational wave emission in binary neutron star early post-merger within a dark environment |
| title_fullStr | Gravitational wave emission in binary neutron star early post-merger within a dark environment |
| title_full_unstemmed | Gravitational wave emission in binary neutron star early post-merger within a dark environment |
| title_short | Gravitational wave emission in binary neutron star early post-merger within a dark environment |
| title_sort | gravitational wave emission in binary neutron star early post merger within a dark environment |
| topic | Dark matter Effective Lagrangian Gravitational waves Binary neutron star merger |
| url | http://www.sciencedirect.com/science/article/pii/S0370269325001182 |
| work_keys_str_mv | AT dsuarezfontanella gravitationalwaveemissioninbinaryneutronstarearlypostmergerwithinadarkenvironment AT dbarbagonzalez gravitationalwaveemissioninbinaryneutronstarearlypostmergerwithinadarkenvironment AT calbertus gravitationalwaveemissioninbinaryneutronstarearlypostmergerwithinadarkenvironment AT mangelesperezgarcia gravitationalwaveemissioninbinaryneutronstarearlypostmergerwithinadarkenvironment |