TY - JOUR
T1 - GW241011 and GW241110
T2 - Exploring Binary Formation and Fundamental Physics with Asymmetric, High-spin Black Hole Coalescences
AU - Abac, A. G.
AU - Abouelfettouh, I.
AU - Acernese, F.
AU - Ackley, K.
AU - Adamcewicz, C.
AU - Adhicary, S.
AU - Adhikari, D.
AU - Adhikari, N.
AU - Adhikari, R. X.
AU - Adkins, V. K.
AU - Afroz, S.
AU - Agapito, A.
AU - Agarwal, D.
AU - Agathos, M.
AU - Aggarwal, N.
AU - Aggarwal, S.
AU - Aguiar, O. D.
AU - Ahrend, I. -L.
AU - Aiello, L.
AU - Ain, A.
AU - Ajith, P.
AU - Akutsu, T.
AU - Albanesi, S.
AU - Ali, W.
AU - Al-Kershi, S.
AU - Allene, C.
AU - Allocca, A.
AU - Al-Shammari, S.
AU - Altin, P. A.
AU - Alvarez-Lopez, S.
AU - Amar, W.
AU - Amarasinghe, O.
AU - Amato, A.
AU - Amicucci, F.
AU - Amra, C.
AU - Ananyeva, A.
AU - Anderson, S. B.
AU - Anderson, W. G.
AU - Andia, M.
AU - Ando, M.
AU - Andres-Carcasona, M.
AU - Andric, T.
AU - Anglin, J.
AU - Ansoldi, S.
AU - Antelis, J. M.
AU - Antier, S.
AU - Antonini, F.
AU - Aoumi, M.
AU - Appavuravther, E. Z.
AU - Appert, S.
AU - KAGRA Collaboration
AU - LIGO Scientific Collaboration
AU - Virgo Collaboration
AU - Hild, Stefan
AU - Steinlechner, Jessica
AU - Danilishin, Stefan
AU - Iandolo, Guido Alex
AU - Diksha, Diksha
AU - Kranzhoff, Luise
AU - Vardaro, Marco
AU - Wöhler, Janis
AU - Massaro, Luca
AU - van den Bossche, Elise
AU - Silenzi, Laura
AU - Koekoek, Gideon
AU - Steinlechner, Sebastian
AU - Spagnuolo, Viola
AU - van den Brand, Johannes
AU - Bertolini, Alessandro
PY - 2025/11/1
Y1 - 2025/11/1
N2 - We report the observation of gravitational waves from two binary black hole coalescences during the fourth observing run of the LIGO-Virgo-KAGRA detector network, GW241011 and GW241110. The sources of these two signals are characterized by rapid and precisely measured primary spins, nonnegligible spin-orbit misalignment, and unequal mass ratios between their constituent black holes. These properties are characteristic of binaries in which the more massive object was itself formed from a previous binary black hole merger and suggest that the sources of GW241011 and GW241110 may have formed in dense stellar environments in which repeated mergers can take place. As the third-loudest gravitational-wave event published to date, with a median network signal-to-noise ratio of 36.0, GW241011 furthermore yields stringent constraints on the Kerr nature of black holes, the multipolar structure of gravitational-wave generation, and the existence of ultralight bosons within the mass range 10(-13)-10(-12) eV.
AB - We report the observation of gravitational waves from two binary black hole coalescences during the fourth observing run of the LIGO-Virgo-KAGRA detector network, GW241011 and GW241110. The sources of these two signals are characterized by rapid and precisely measured primary spins, nonnegligible spin-orbit misalignment, and unequal mass ratios between their constituent black holes. These properties are characteristic of binaries in which the more massive object was itself formed from a previous binary black hole merger and suggest that the sources of GW241011 and GW241110 may have formed in dense stellar environments in which repeated mergers can take place. As the third-loudest gravitational-wave event published to date, with a median network signal-to-noise ratio of 36.0, GW241011 furthermore yields stringent constraints on the Kerr nature of black holes, the multipolar structure of gravitational-wave generation, and the existence of ultralight bosons within the mass range 10(-13)-10(-12) eV.
KW - DENSE STAR-CLUSTERS
KW - GRAVITATIONAL-WAVE DETECTOR
KW - ANGULAR-MOMENTUM TRANSPORT
KW - PULSATIONAL PAIR-INSTABILITY
KW - POST-NEWTONIAN DYNAMICS
KW - ADVANCED-LIGO
KW - ORBIT MISALIGNMENT
KW - BAYESIAN-INFERENCE
KW - PARAMETER-ESTIMATION
KW - COMPACT BINARIES
U2 - 10.3847/2041-8213/ae0d54
DO - 10.3847/2041-8213/ae0d54
M3 - Article
SN - 2041-8205
VL - 993
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
M1 - L21
ER -