Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Ortiz, Néstor"'
We analyze numerically the dynamical transition to spontaneous scalarization in neutron stars in the framework of a scalar-tensor theory of gravity where the scalar field is free but massive, and it is coupled non minimally to gravity in the Jordan f
Externí odkaz:
http://arxiv.org/abs/2407.08124
Autor:
Gamba, Rossella, Breschi, Matteo, Bernuzzi, Sebastiano, Nagar, Alessandro, Cook, William, Doulis, Georgios, Fabbri, Francesco, Ortiz, Néstor, Poudel, Amit, Rashti, Alireza, Tichy, Wolfgang, Ujevic, Maximiliano
Gravitational wave astronomy pipelines rely on template waveform models for searches and parameter estimation purposes. For coalescing binary neutron stars (BNS), such models need to accurately reproduce numerical relativity (NR) up to merger, in ord
Externí odkaz:
http://arxiv.org/abs/2307.15125
In certain scalar-field extensions to general relativity, scalar charges can develop on compact objects in an inspiraling binary -- an effect known as dynamical scalarization. This effect can be modeled using effective-field-theory methods applied to
Externí odkaz:
http://arxiv.org/abs/2206.13233
Publikováno v:
Phys. Rev. D 104, 104036 (2021)
The spectrum of oscillating compact objects can be considerably altered in alternative theories of gravity. In particular, it may be enriched by modes with no counterpart in general relativity, tied to the dynamics of additional degrees of freedom ge
Externí odkaz:
http://arxiv.org/abs/2107.07036
Autor:
Ortiz, Néstor, Carrasco, Federico, Green, Stephen R., Lehner, Luis, Liebling, Steven L., Westernacher-Schneider, John Ryan
Publikováno v:
JCAP02 (2022) 027
We study sky maps and light curves of gamma-ray emission from neutron stars in compact binaries, and in isolation. We briefly review some gamma-ray emission models, and reproduce sky maps from a standard isolated pulsar in the Separatrix Layer model.
Externí odkaz:
http://arxiv.org/abs/2107.07020
Publikováno v:
In Journal of the Academy of Nutrition and Dietetics April 2024 124(4):521-530
Gravitational waves emitted by black hole binary inspiral and mergers enable unprecedented strong-field tests of gravity, requiring accurate theoretical modelling of the expected signals in extensions of General Relativity. In this paper we model the
Externí odkaz:
http://arxiv.org/abs/2105.13972
Autor:
Sánchez-Ortiz, Néstor A., Batis, Carolina, Castellanos-Gutiérrez, Analí, Colchero, M. Arantxa
Publikováno v:
In Journal of the Academy of Nutrition and Dietetics July 2024
Publikováno v:
Phys. Rev. D 103, 121503 (2021)
Gravitational waves (GWs) from merging black holes allow for unprecedented probes of strong-field gravity. Testing gravity in this regime requires accurate predictions of gravitational waveform templates in viable extensions of General Relativity. We
Externí odkaz:
http://arxiv.org/abs/2012.09162
Autor:
Bernuzzi, Sebastiano, Breschi, Matteo, Daszuta, Boris, Endrizzi, Andrea, Logoteta, Domenico, Nedora, Vsevolod, Perego, Albino, Schianchi, Federico, Radice, David, Zappa, Francesco, Bombaci, Ignazio, Ortiz, Nestor
We present new numerical relativity results of neutron star mergers with chirp mass $1.188M_\odot$ and mass ratios $q=1.67$ and $q=1.8$ using finite-temperature equations of state (EOS), approximate neutrino transport and a subgrid model for magnetoh
Externí odkaz:
http://arxiv.org/abs/2003.06015