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This paper presents updated estimates of source parameters for GW150914, a binary black-hole coalescence event detected by the Laser Interferometer Gravitational-wave Observatory (LIGO) in 2015 [Abbott et al. Phys. Rev. Lett. 116, 061102 (2016).]. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] presented parameter estimation of the source using a 13-dimensional, phenomenological precessing-spin model (precessing IMRPhenom) and an 11-dimensional nonprecessing effective-one-body (EOB) model calibrated to numerical-relativity simulations, which forces spin alignment (nonprecessing EOBNR). Here, we present new results that include a 15-dimensional precessing-spin waveform model (precessing EOBNR) developed within the EOB formalism. We find good agreement with the parameters estimated previously [Abbott et al. Phys. Rev. Lett. 116, 241102 (2016).], and we quote updated component masses of 35+5−3 M⊙ and 30+3−4 M⊙ (where errors correspond to 90% symmetric credible intervals). We also present slightly tighter constraints on the dimensionless spin magnitudes of the two black holes, with a primary spin estimate <0.65 and a secondary spin estimate <0.75 at 90% probability. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] estimated the systematic parameter-extraction errors due to waveform-model uncertainty by combining the posterior probability densities of precessing IMRPhenom and nonprecessing EOBNR. Here, we find that the two precessing-spin models are in closer agreement, suggesting that these systematic errors are smaller than previously quoted.
Improved Analysis of GW150914 Using a Fully Spin-Precessing Waveform Model
Abbott, B. .p.;Abbott, R.;Abbott, T. .d.;Abernathy, M. .r.;Acernese, F.;Ackley, K.;Adams, C.;Adams, T.;Addesso, P.;Adhikari, R. .x.;Adya, V. .b.;Affeldt, C.;Agathos, M.;Agatsuma, K.;Aggarwal, N.;Aguiar, O. .d.;Aiello, L.;Ain, A.;Ajith, P.;Allen, B.;Allocca, A.;Altin, P. .a.;Anderson, S. .b.;Anderson, W. .g.;Arai, K.;Araya, M. .c.;Arceneaux, C. .c.;Areeda, J. .s.;Arnaud, N.;Arun, K. .g.;Ascenzi, S.;Ashton, G.;Ast, M.;Aston, S. .m.;Astone, P.;Aufmuth, P.;Aulbert, C.;Babak, S.;Bacon, P.;Bader, M. .k. .m.;Baker, P. .t.;Baldaccini, F.;Ballardin, G.;Ballmer, S. .w.;Barayoga, J. .c.;Barclay, S. .e.;Barish, B. .c.;Barker, D.;Barone, F.;Barr, B.;Barsotti, L.;Barsuglia, M.;Barta, D.;Bartlett, J.;Bartos, I.;Bassiri, R.;Basti, A.;Batch, J. .c.;Baune, C.;Bavigadda, V.;Bazzan, M.;Bejger, M.;Bell, A. .s.;Berger, B. .k.;Bergmann, G.;Berry, C. .p. .l.;Bersanetti, D.;Bertolini, A.;Betzwieser, J.;Bhagwat, S.;Bhandare, R.;Bilenko, I. .a.;Billingsley, G.;Birch, J.;Birney, R.;Birnholtz, O.;Biscans, S.;Bisht, A.;Bitossi, M.;Biwer, C.;Bizouard, M. .a.;Blackburn, J. .k.;Blair, C. .d.;Blair, D. .g.;Blair, R. .m.;Bloemen, S.;Bock, O.;Boer, M.;Bogaert, G.;Bogan, C.;Bohe, A.;Bond, C.;Bondu, F.;Bonnand, R.;Boom, B. .a.;Bork, R.;Boschi, V.;Bose, S.;Bouffanais, Y.;Bozzi, A.;Bradaschia, C.;Brady, P. .r.;Braginsky, V. .b.;BRANCHESI, MARICA;Brau, J. .e.;Briant, T.;Brillet, A.;Brinkmann, M.;Brisson, V.;Brockill, P.;Broida, J. .e.;Brooks, A. .f.;Brown, D. .a.;Brown, D. .d.;Brown, N. .m.;Brunett, S.;Buchanan, C. .c.;Buikema, A.;Bulik, T.;Bulten, H. .j.;Buonanno, A.;Buskulic, D.;Buy, C.;Byer, R. .l.;Cabero, M.;Cadonati, L.;Cagnoli, G.;Cahillane, C.;Calderón Bustillo, J.;Callister, T.;Calloni, E.;Camp, J. .b.;Cannon, K. .c.;Cao, J.;Capano, C. .d.;Capocasa, E.;Carbognani, F.;Caride, S.;Casanueva Diaz, C.;Casentini, J.;Caudill, S.;Cavaglià, M.;Cavalier, F.;Cavalieri, R.;Cella, G.;Cepeda, C. .b.;CERBONI BAIARDI, LORENZO;Cerretani, G.;Cesarini, E.;Chamberlin, S. .j.;Chan, M.;Chao, S.;Charlton, P.;Chassande Mottin, E.;Cheeseboro, B. .d.;Chen, H. .y.;Chen, Y.;Cheng, C.;Chincarini, A.;Chiummo, A.;Cho, H. .s.;Cho, M.;Chow, J. .h.;Christensen, N.;Chu, Q.;Chua, S.;Chung, S.;Ciani, G.;Clara, F.;Clark, J. .a.;Cleva, F.;Coccia, E.;Cohadon, P. 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2016
Abstract
This paper presents updated estimates of source parameters for GW150914, a binary black-hole coalescence event detected by the Laser Interferometer Gravitational-wave Observatory (LIGO) in 2015 [Abbott et al. Phys. Rev. Lett. 116, 061102 (2016).]. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] presented parameter estimation of the source using a 13-dimensional, phenomenological precessing-spin model (precessing IMRPhenom) and an 11-dimensional nonprecessing effective-one-body (EOB) model calibrated to numerical-relativity simulations, which forces spin alignment (nonprecessing EOBNR). Here, we present new results that include a 15-dimensional precessing-spin waveform model (precessing EOBNR) developed within the EOB formalism. We find good agreement with the parameters estimated previously [Abbott et al. Phys. Rev. Lett. 116, 241102 (2016).], and we quote updated component masses of 35+5−3 M⊙ and 30+3−4 M⊙ (where errors correspond to 90% symmetric credible intervals). We also present slightly tighter constraints on the dimensionless spin magnitudes of the two black holes, with a primary spin estimate <0.65 and a secondary spin estimate <0.75 at 90% probability. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] estimated the systematic parameter-extraction errors due to waveform-model uncertainty by combining the posterior probability densities of precessing IMRPhenom and nonprecessing EOBNR. Here, we find that the two precessing-spin models are in closer agreement, suggesting that these systematic errors are smaller than previously quoted.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/866109
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