Zobrazeno 1 - 10
of 804
pro vyhledávání: '"Berti, Emanuele"'
The spin of intermediate-mass black holes (IMBHs) growing through repeated black hole mergers in stellar clusters statistically asymptotes to zero. Putative observations of IMBHs with dimensionless spin parameter $\chi\gtrsim 0.6$ would require a pha
Externí odkaz:
http://arxiv.org/abs/2409.15439
Black hole demographics in different environments is critical in view of recent results on massive-stars binarity, and of the multi-messenger detectability of compact objects mergers. But the identification and characterization of non-interacting bla
Externí odkaz:
http://arxiv.org/abs/2409.06906
Recent work has shown that the quasinormal mode spectrum of black holes is unstable under small perturbations (of order $\epsilon$) of the radial potential, while the early time-domain ringdown waveform is only marginally affected. In this paper we p
Externí odkaz:
http://arxiv.org/abs/2407.20131
Stochastic gravitational-wave backgrounds can be of either cosmological or astrophysical origin. The detection of an astrophysical stochastic gravitational-wave background with ground-based interferometers is expected in the near future. Perhaps even
Externí odkaz:
http://arxiv.org/abs/2406.10757
Autor:
Reali, Luca, Cotesta, Roberto, Antonelli, Andrea, Kritos, Konstantinos, Strokov, Vladimir, Berti, Emanuele
Astrophysical scenarios for the formation and evolution of intermediate-mass black holes (IMBHs) in the mass range $10^2 M_\odot \lesssim M \lesssim 10^6 M_\odot$ remain uncertain, but future ground-based gravitational-wave (GW) interferometers will
Externí odkaz:
http://arxiv.org/abs/2406.01687
Galactic double white dwarf (DWD) binaries are among the guaranteed sources for the Laser Interferometer Space Antenna (LISA), an upcoming space-based gravitational wave (GW) detector. Most DWDs in the LISA band are far from merging and emit quasimon
Externí odkaz:
http://arxiv.org/abs/2405.13109
Autor:
Gupta, Anuradha, Arun, K. G., Barausse, Enrico, Bernard, Laura, Berti, Emanuele, Bhat, Sajad A., Buonanno, Alessandra, Cardoso, Vitor, Cheung, Shun Yin, Clarke, Teagan A., Datta, Sayantani, Dhani, Arnab, Ezquiaga, Jose María, Gupta, Ish, Guttman, Nir, Hinderer, Tanja, Hu, Qian, Janquart, Justin, Johnson-McDaniel, Nathan K., Kashyap, Rahul, Krishnendu, N. V., Lasky, Paul D., Lundgren, Andrew, Maggio, Elisa, Mahapatra, Parthapratim, Maselli, Andrea, Narayan, Purnima, Nielsen, Alex B., Nuttall, Laura K., Pani, Paolo, Passenger, Lachlan, Payne, Ethan, Pompili, Lorenzo, Reali, Luca, Saini, Pankaj, Samajdar, Anuradha, Tiwari, Shubhanshu, Tong, Hui, Broeck, Chris Van Den, Yagi, Kent, Yang, Huan, Yunes, Nicolás, Sathyaprakash, B. S.
General relativity (GR) has proven to be a highly successful theory of gravity since its inception. The theory has thrivingly passed numerous experimental tests, predominantly in weak gravity, low relative speeds, and linear regimes, but also in the
Externí odkaz:
http://arxiv.org/abs/2405.02197
In this work we compute numerical bounds on the mass $\mu$ of superradiantly unstable scalar fields in a Kerr black hole background using the continued fraction method. We show that the normalized upper bound on the mass $\mu$ increases with the angu
Externí odkaz:
http://arxiv.org/abs/2405.01003
Rapid formation of supermassive black holes occurs in dense nuclear star clusters that are initially gas-dominated. Stellar-mass black hole remnants of the most massive cluster sink into the core, where a massive runaway black hole forms as a consequ
Externí odkaz:
http://arxiv.org/abs/2404.11676
Publikováno v:
Phys. Rev. D 109, 124008 (2024)
Fermion soliton stars are a consistent model of exotic compact objects which involve a nonlinear interaction between a real scalar field and fermions through a Yukawa term. This interaction results in an effective fermion mass that depends upon the v
Externí odkaz:
http://arxiv.org/abs/2404.06979