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GW170817: Measurements of Neutron Star Radii and Equation of State

Title:	GW170817: Measurements of Neutron Star Radii and Equation of State
Authors:	Abbott BP; Abbott R; Abbott TD; Acernese F; Ackley K; Adams C; Adams T; Addesso P; Adhikari RX; Adya VB; Affeldt C; Agarwal B; Agathos M; Agatsuma K; Aggarwal N; Aguiar OD; Aiello L; Ain A; Ajith P; Allen B; Allen G; Allocca A; Aloy MA; Altin PA; Amato A; Ananyeva A; Anderson SB; Anderson WG; Angelova SV; Antier S; Appert S; Arai K; Araya MC; Areeda JS; Arene M; Arnaud N; Arun KG; Ascenzi S; Ashton G; Ast M; Aston SM; Astone P; Atallah DV; Aubin F; Aufmuth P; Aulbert C; AultONeal K; Austin C; Avila-Alvarez A; Babak S; Bacon P; Badaracco F; Bader MKM; Bae S; Baker PT; Baldaccini F; Ballardin G; Ballmer SW; Banagiri S; Barayoga JC; Barclay SE; Barish BC; Barker D; Barkett K; Barnum S; Barone F; Barr B; Barsotti L; Barsuglia M; Barta D; Bartlett J; Bartos I; Bassiri R; Basti A; Batch JC; Bawaj M; Bayley JC; Bazzan M; Becsy B; Beer C; Bejger M; Belahcene I; Bell AS; Beniwal D; Bensch M; Berger BK; Bergmann G; Bernuzzi S; Bero JJ; Berry CPL; Bersanetti D; Bertolini A; Betzwieser J; Bhandare R; Bilenko IA; Bilgili SA; Billingsley G; Billman CR; Birch J; Birney R; Birnholtz O; Biscans S; Biscoveanu S; Bisht A; Bitossi M; Bizouard MA; Blackburn JK; Blackman J; Blair CD; Blair DG; Blair RM; Bloemen S; Bock O; Bode N; Boer M; Boetzel Y; Bogaert G; Bohe A; Bondu F; Bonilla E; Bonnand R; Booker P; Boom BA; Booth CD; Bork R; Boschi V; Bose S; Bossie K; Bossilkov V; Bosveld J; Bouffanais Y; Bozzi A; Bradaschia C; Brady PR; Bramley A; Branchesi M; Brau JE; Briant T; Brighenti F; Brillet A; Brinkmann M; Brisson V; Brockill P; Brooks AF; Brown DD; Brunett S; Buchanan CC; Buikema A; Bulik T; Bulten HJ; Buonanno A; Buskulic D; Buy C; Byer RL; Cabero M; Cadonati L; Cagnoli G; Cahillane C; Bustillo JC; Callister TA; Calloni E; Camp JB; Canepa M; Canizares P; Cannon KC; Cao H; Cao J; Capano CD; Capocasa E; Carbognani F; Caride S; Carney MF; Carullo G; Diaz JC; Casentini C; Caudill S; Cavaglia M; Cavalier F; Cavalieri R; Cella G; Cepeda CB; Cerda-Duran P; Cerretani G; Cesarini E; Chaibi O; Chamberlin SJ; Chan M; Chao S; Charlton P; Chase E; Chassande-Mottin E; Chatterjee D; Chatziioannou K; Cheeseboro BD; Chen HY; Chen X; Chen Y; Cheng HP; Chia HY; Chincarini A; Chiummo A; Chmiel T; Cho HS; Cho M; Chow JH; Christensen N; Chu Q; Chua AJK; Chua S; Chung KW; Chung S; Ciani G; Ciobanu AA; Ciolfi R; Cipriano F; Cirelli CE; Cirone A; Clara F; Clark JA; Clearwater P; Cleva F; Cocchieri C; Coccia E; Cohadon PF; Cohen D; Colla A; Collette CG; Collins C; Cominsky LR; Constancio M; Conti L; Cooper SJ; Corban P; Corbitt TR; Cordero-Carrion I; Corley KR; Cornish N; Corsi A; Cortese S; Costa CA; Cotesta R; Coughlin MW; Coughlin SB; Coulon JP; Countryman ST; Couvares P; Covas PB; Cowan EE; Coward DM; Cowart MJ; Coyne DC; Coyne R; Creighton JDE; Creighton TD; Cripe J; Crowder SG; Cullen TJ; Cumming A; Cunningham L; Cuoco E; Dal Canton T; Dalya G; Danilishin SL; D'Antonio S; Danzmann K; Dasgupta A; Costa CFD; Dattilo V; Dave I; Davier M; Davis D; Daw EJ; Day B; DeBra D; Deenadayalan M; 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Maros E; Marquina A; Martelli F; Martellini L; Martin IW; Martin RM; Martynov DV; Mason K; Massera E; Masserot A; Massinger TJ; Masso-Reid M; Mastrogiovanni S; Matas A; Matichard F; Matone L; Mavalvala N; Mazumder N; McCann JJ; McCarthy R; McClelland DE; McCormick S; McCuller L; McGuire SC; McIver J; McManus DJ; McRae T; McWilliams ST; Meacher D; Meadors GD; Mehmet M; Meidam J; Mejuto-Villa E; Melatos A; Mendell G; Mendoza-Gandara D; Mercer RA; Mereni L; Merilh EL; Merzougui M; Meshkov S; Messenger C; Messick C; Metzdorff R; Meyers PM; Miao H; Michel C; Middleton H; Mikhailov EE; Milano L; Miller AL; Miller A; Miller BB; Miller J; Millhouse M; Mills J; Milovich-Goff MC; Minazzoli O; Minenkov Y; Ming J; Mishra C; Mitra S; Mitrofanov VP; Mitselmakher G; Mittleman R; Moffa D; Mogushi K; Mohan M; Mohapatra SRP; Montani M; Moore CJ; Moraru D; Moreno G; Morisaki S; Mours B; Mow-Lowry CM; Mueller G; Muir AW; Mukherjee A; Mukherjee D; Mukherjee S; Mukund N; Mullavey A; Munch J; Muniz EA; Muratore M; Murray PG; Nagar A; Napier K; Nardecchia I; Naticchioni L; Nayak RK; Neilson J; Nelemans G; Nelson TJN; Nery M; Neunzert A; Nevin L; Newport JM; Ng KY; Ng S; Nguyen P; Nguyen TT; Nichols D; Nielsen AB; Nissanke S; Nitz A; Nocera F; Nolting D; North C; Nuttall LK; Obergaulinger M; Oberling J; O'Brien BD; O'Dea GD; Ogin GH; Oh JJ; Oh SH; Ohme F; Ohta H; Okada MA; Oliver M; Oppermann P; Oram RJ; O'Reilly B; Ormiston R; Ortega LF; O'Shaughnessy R; Ossokine S; Ottaway DJ; Overmier H; Owen BJ; Pace AE; Pagano G; Page J; Page MA; Pai A; Pai SA; Palamos JR; Palashov O; Palomba C; Pal-Singh A; Pan H; Pan HW; Pang B; Pang PTH; Pankow C; Pannarale F; Pant BC; Paoletti F; Paoli A; Papa MA; Parida A; Parker W; Pascucci D; Pasqualetti A; Passaquieti R; Passuello D; Patil M; Patricelli B; Pearlstone BL; Pedersen C; Pedraza M; Pedurand R; Pekowsky L; Pele A; Penn S; Perego A; Perez CJ; Perreca A; Perri LM; Pfeiffer HP; Phelps M; Phukon KS; Piccinni OJ; Pichot M; Piergiovanni F; Pierro V; Pillant G; Pinard L; Pinto IM; Pirello M; Pitkin M; Poggiani R; Popolizio P; Porter EK; Possenti L; Post A; Powell J; Prasad J; Pratt JWW; Pratten G; Predoi V; Prestegard T; Principe M; Privitera S; Prodi GA; Prokhorov LG; Puncken O; Punturo M; Puppo P; Purrer M; Qi H; Quetschke V; Quintero EA; Quitzow-James R; Raab FJ; Rabeling DS; Radkins H; Raffai P; Raja S; Rajan C; Rajbhandari B; Rakhmanov M; Ramirez KE; Ramos-Buades A; Rana J; Rapagnani P; Raymond V; Razzano M; Read J; Regimbau T; Rei L; Reid S; Reitze DH; Ren W; Ricci F; Ricker PM; Riemenschneider GM; Riles K; Rizzo M; Robertson NA; Robie R; Robinet F; Robson T; Rocchi A; Rolland L; Rollins JG; Roma VJ; Romano R; Romel CL; Romie JH; Rosinska D; Ross MP; Rowan S; Rudiger A; Ruggi P; Rutins G; Ryan K; Sachdev S; Sadecki T; Sakellariadou M; Salconi L; Saleem M; Salemi F; Samajdar A; Sammut L; Sampson LM; Sanchez EJ; Sanchez LE; Sanchis-Gual N; Sandberg V; Sanders JR; Sarin N; Sassolas B; Sathyaprakash BS; Saulson PR; Sauter O; Savage RL; Sawadsky A; Schale P; 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Contributors:	Abbott, Bp; Abbott, R; Abbott, Td; Acernese, F; Ackley, K; Adams, C; Adams, T; Addesso, P; Adhikari, Rx; Adya, Vb; Affeldt, C; Agarwal, B; Agathos, M; Agatsuma, K; Aggarwal, N; Aguiar, Od; Aiello, L; Ain, A; Ajith, P; Allen, B; Allen, G; Allocca, A; Aloy, Ma; Altin, Pa; Amato, A; Ananyeva, A; Anderson, Sb; Anderson, Wg; Angelova, Sv; Antier, S; Appert, S; Arai, K; Araya, Mc; Areeda, J; Arene, M; Arnaud, N; Arun, Kg; Ascenzi, S; Ashton, G; Ast, M; Aston, Sm; Astone, P; Atallah, Dv; Aubin, F; Aufmuth, P; Aulbert, C; Aultoneal, K; Austin, C; Avila-Alvarez, A; Babak, S; Bacon, P; Badaracco, F; Bader, Mkm; Bae, S; Baker, Pt; Baldaccini, F; Ballardin, G; Ballmer, Sw; Banagiri, S; Barayoga, Jc; Barclay, Se; Barish, Bc; Barker, D; Barkett, K; Barnum, S; Barone, F; Barr, B; Barsotti, L; Barsuglia, M; Barta, D; Bartlett, J; Bartos, I; Bassiri, R; Basti, A; Batch, Jc; Bawaj, M; Bayley, Jc; Bazzan, M; Becsy, B; Beer, C; Bejger, M; Belahcene, I; Bell, A; Beniwal, D; Bensch, M; Berger, Bk; Bergmann, G; Bernuzzi, S; Bero, Jj; Berry, Cpl; Bersanetti, D; Bertolini, A; Betzwieser, J; Bhandare, R; Bilenko, Ia; Bilgili, Sa; Billingsley, G; Billman, Cr; Birch, J; Birney, R
Publication Year:	2018
Collection:	Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste)
Subject Terms:	Equations of state of nuclear matter; Gravitational wave source; Gravitational wave; Nuclear matter in neutron stars
Description:	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(rho) 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-circle dot 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(rho) at supranuclear densities, with pressure at twice nuclear saturation density measured at 3.5(-1.7)(+2.7) x 10(34) dyn cm(-2) at the 90% level.
Document Type:	article in journal/newspaper
Language:	English
Relation:	info:eu-repo/semantics/altIdentifier/wos/WOS:000447307500001; volume:121; issue:16; firstpage:1; lastpage:16; numberofpages:16; journal:PHYSICAL REVIEW LETTERS; https://hdl.handle.net/11368/3002837
DOI:	10.1103/PhysRevLett.121.161101
Availability:	https://hdl.handle.net/11368/3002837; https://doi.org/10.1103/PhysRevLett.121.161101
Rights:	info:eu-repo/semantics/openAccess
Accession Number:	edsbas.6E0B0FD9
Database:	BASE