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GW170817: Measurements of Neutron Star Radii and Equation of State

Allen, G ; Angelova, S V ; Appert, S ; Badaracco, F ; Bae, S ; Ballardin, G ; Banagiri, S ; Barr, B ; Beer, C ; Betzwieser, J ; Billingsley, G ; Bisht, A ; Briant, T ; Cadonati, L ; Cao, J ; Capocasa, E ; Chen, X ; Collins, C ; Conti, L ; Cordero-Carrión, I ; Cunningham, L ; Day, B ; Deenadayalan, M ; Del Pozzo, W ; Demos, N ; Ding, B ; Di Palma, I ; Di Renzo, F ; Downes, T P ; Dupej, P ; Farinon, S ; Ferrini, F ; Fulda, P ; Gabbard, H A ; Gammaitoni, L ; Gennai, A ; Goetz, R ; González, G ; Gossan, S E ; Gray, C ; Hanks, J ; Harry, I W ; Haughian, K ; Heitmann, H ; Horst, C ; Huerta, E A ; Hulko, M ; Ingram, C ; Jonker, R J G ; Kasprzack, M ; Khan, I ; Knowles, T D ; Koehlenbeck, S M ; Korobko, M ; Lasky, P D ; Lazzarini, A ; Lenon, A ; Levin, Y ; Longo, A ; Magaña-Sandoval, F ; Martin, I W ; Milovich-Goff, M C ; Mishra, C ; Morisaki, S ; Muñiz, E A ; Muratore, M ; Nelson, T J N ; O'Dea, G D ; Page, M A ; Palomba, C ; Pan, Huang-Wei ; Possenti, L ; Quintero, E A ; Quitzow-James, R ; Rabeling, D S ; Raffai, P ; Ramirez, K E ; Ren, W ; Sassolas, B ; Schale, P ; Schulte, B W ; Sequino, V ; Shen, H ; Slaven-Blair, T J ; Sutton, P J ; Talukder, D ; Toland, K ; Travasso, F ; Trozzo, L ; Usman, S A ; Van Den Broeck, C ; van Heijningen, J V ; Wang, H ; Wang, W H ; Weinert, M ; Willke, B ; Yancey, C C ; Yazback, M ; Zhang, M ; Zimmerman, A B

Phys.Rev.Lett, 2018-10, Vol.121 (16), p.161101-161101, Article 161101 [Periódico revisado por pares]

United States: American Physical Society

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GW170817: Measurements of Neutron Star Radii and Equation of State
Autor: Allen, G ; Angelova, S V ; Appert, S ; Badaracco, F ; Bae, S ; Ballardin, G ; Banagiri, S ; Barr, B ; Beer, C ; Betzwieser, J ; Billingsley, G ; Bisht, A ; Briant, T ; Cadonati, L ; Cao, J ; Capocasa, E ; Chen, X ; Collins, C ; Conti, L ; Cordero-Carrión, I ; Cunningham, L ; Day, B ; Deenadayalan, M ; Del Pozzo, W ; Demos, N ; Ding, B ; Di Palma, I ; Di Renzo, F ; Downes, T P ; Dupej, P ; Farinon, S ; Ferrini, F ; Fulda, P ; Gabbard, H A ; Gammaitoni, L ; Gennai, A ; Goetz, R ; González, G ; Gossan, S E ; Gray, C ; Hanks, J ; Harry, I W ; Haughian, K ; Heitmann, H ; Horst, C ; Huerta, E A ; Hulko, M ; Ingram, C ; Jonker, R J G ; Kasprzack, M ; Khan, I ; Knowles, T D ; Koehlenbeck, S M ; Korobko, M ; Lasky, P D ; Lazzarini, A ; Lenon, A ; Levin, Y ; Longo, A ; Magaña-Sandoval, F ; Martin, I W ; Milovich-Goff, M C ; Mishra, C ; Morisaki, S ; Muñiz, E A ; Muratore, M ; Nelson, T J N ; O'Dea, G D ; Page, M A ; Palomba, C ; Pan, Huang-Wei ; Possenti, L ; Quintero, E A ; Quitzow-James, R ; Rabeling, D S ; Raffai, P ; Ramirez, K E ; Ren, W ; Sassolas, B ; Schale, P ; Schulte, B W ; Sequino, V ; Shen, H ; Slaven-Blair, T J ; Sutton, P J ; Talukder, D ; Toland, K ; Travasso, F ; Trozzo, L ; Usman, S A ; Van Den Broeck, C ; van Heijningen, J V ; Wang, H ; Wang, W H ; Weinert, M ; Willke, B ; Yancey, C C ; Yazback, M ; Zhang, M ; Zimmerman, A B
Assuntos: Astrophysics ; Aérospatiale, astronomie & astrophysique ; Binary stars ; Coalescing ; Equations of state ; General Relativity and Quantum Cosmology ; Gravitation ; Gravitational waves ; Neutron stars ; Neutrons ; Observatories ; Parameterization ; Physical, chemical, mathematical & earth Sciences ; Physics ; Physique, chimie, mathématiques & sciences de la terre ; Space science, astronomy & astrophysics ; Stars ; Tidal effects
É parte de: Phys.Rev.Lett, 2018-10, Vol.121 (16), p.161101-161101, Article 161101
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
scopus-id:2-s2.0-85055099569
Descrição: On 17 August 2017, the LIGO and Virgo observatories made the first direct detection of gravitational waves from the coalescence of a neutron star binary system. The detection of this gravitational-wave signal, GW170817, offers a novel opportunity to directly probe the properties of matter at the extreme conditions found in the interior of these stars. The initial, minimal-assumption analysis of the LIGO and Virgo data placed constraints on the tidal effects of the coalescing bodies, which were then translated to constraints on neutron star radii. Here, we expand upon previous analyses by working under the hypothesis that both bodies were neutron stars that are described by the same equation of state and have spins within the range observed in Galactic binary neutron stars. Our analysis employs two methods: the use of equation-of-state-insensitive relations between various macroscopic properties of the neutron stars and the use of an efficient parametrization of the defining function p(ρ) of the equation of state itself. From the LIGO and Virgo data alone and the first method, we measure the two neutron star radii as R_{1}=10.8_{-1.7}^{+2.0} km for the heavier star and R_{2}=10.7_{-1.5}^{+2.1} km for the lighter star at the 90% credible level. If we additionally require that the equation of state supports neutron stars with masses larger than 1.97 M_{⊙} as required from electromagnetic observations and employ the equation-of-state parametrization, we further constrain R_{1}=11.9_{-1.4}^{+1.4} km and R_{2}=11.9_{-1.4}^{+1.4} km at the 90% credible level. Finally, we obtain constraints on p(ρ) at supranuclear densities, with pressure at twice nuclear saturation density measured at 3.5_{-1.7}^{+2.7}×10^{34} dyn cm^{-2} at the 90% level.
Editor: United States: American Physical Society
Idioma: Inglês

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GW170817: Measurements of Neutron Star Radii and Equation of State

United States: American Physical Society

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