Zobrazeno 1 - 10
of 389
pro vyhledávání: '"Sotiriou, Thomas P"'
We study spherical evolution in scalar-Gauss-Bonnet gravity with additional Ricci coupling and use the gauge-invariant approach of Ref.~\cite{Reall:2021voz} to track well-posedness. Our results show that loss of hyperbolicity when it occurs, is due t
Externí odkaz:
http://arxiv.org/abs/2410.16264
Massive scalar fields are promising candidates to address many unresolved problems in fundamental physics. We report the first model-agnostic Bayesian search of massive scalar fields in LIGO/Virgo/KAGRA gravitational-wave data. We find no evidence fo
Externí odkaz:
http://arxiv.org/abs/2410.14801
We study the dynamics of spherically symmetric black holes in scalar Gauss-Bonnet gravity with an additional coupling between the scalar field and the Ricci scalar using non-linear simulations that employ excision. In this class of theories, black ho
Externí odkaz:
http://arxiv.org/abs/2409.11398
Autor:
Speri, Lorenzo, Barsanti, Susanna, Maselli, Andrea, Sotiriou, Thomas P., Warburton, Niels, van de Meent, Maarten, Chua, Alvin J. K., Burke, Ollie, Gair, Jonathan
Extreme Mass Ratio Inspirals (EMRIs) are key sources for the future space-based gravitational wave detector LISA, and are considered promising probes of fundamental physics. Here, we present the first complete Bayesian analysis of EMRI signals in the
Externí odkaz:
http://arxiv.org/abs/2406.07607
In this note, we discuss the effect of light, non-gauge, bosonic degrees of freedom on the exterior spacetime of an exotic compact object. We show that such fields generically introduce large deviations from black hole spacetimes of General Relativit
Externí odkaz:
http://arxiv.org/abs/2405.10287
Autor:
Ventagli, Giulia, Fernandes, Pedro G. S., Maselli, Andrea, Padilla, Antonio, Sotiriou, Thomas P.
Phase transitions can play an important role in the cosmological constant problem, allowing the underlying vacuum energy, and therefore the value of the cosmological constant, to change. Deep within the core of neutron stars, the local pressure may b
Externí odkaz:
http://arxiv.org/abs/2404.19012
Publikováno v:
Phys. Rev. D 110, 024065 (2024)
Gravitational wave observations can test the validity of General Relativity (GR) in the strong field regime. Certain classes of scalar-tensor theories indeed predict that compact objects can exhibit significant deviations from their GR counterparts.
Externí odkaz:
http://arxiv.org/abs/2404.02479
In this work, we explore the properties and shadows of spin-induced scalarized black holes, as well as investigate how a Ricci coupling influences them. Our findings reveal significant deviations from the Kerr metric in terms of the location and geod
Externí odkaz:
http://arxiv.org/abs/2403.14596
Autor:
Colpi, Monica, Danzmann, Karsten, Hewitson, Martin, Holley-Bockelmann, Kelly, Jetzer, Philippe, Nelemans, Gijs, Petiteau, Antoine, Shoemaker, David, Sopuerta, Carlos, Stebbins, Robin, Tanvir, Nial, Ward, Henry, Weber, William Joseph, Thorpe, Ira, Daurskikh, Anna, Deep, Atul, Núñez, Ignacio Fernández, Marirrodriga, César García, Gehler, Martin, Halain, Jean-Philippe, Jennrich, Oliver, Lammers, Uwe, Larrañaga, Jonan, Lieser, Maike, Lützgendorf, Nora, Martens, Waldemar, Mondin, Linda, Niño, Ana Piris, Amaro-Seoane, Pau, Sedda, Manuel Arca, Auclair, Pierre, Babak, Stanislav, Baghi, Quentin, Baibhav, Vishal, Baker, Tessa, Bayle, Jean-Baptiste, Berry, Christopher, Berti, Emanuele, Boileau, Guillaume, Bonetti, Matteo, Brito, Richard, Buscicchio, Riccardo, Calcagni, Gianluca, Capelo, Pedro R., Caprini, Chiara, Caputo, Andrea, Castelli, Eleonora, Chen, Hsin-Yu, Chen, Xian, Chua, Alvin, Davies, Gareth, Derdzinski, Andrea, Domcke, Valerie Fiona, Doneva, Daniela, Dvorkin, Irna, Ezquiaga, Jose María, Gair, Jonathan, Haiman, Zoltan, Harry, Ian, Hartwig, Olaf, Hees, Aurelien, Heffernan, Anna, Husa, Sascha, Izquierdo, David, Karnesis, Nikolaos, Klein, Antoine, Korol, Valeriya, Korsakova, Natalia, Kupfer, Thomas, Laghi, Danny, Lamberts, Astrid, Larson, Shane, Jeune, Maude Le, Lewicki, Marek, Littenberg, Tyson, Madge, Eric, Mangiagli, Alberto, Marsat, Sylvain, Vilchez, Ivan Martin, Maselli, Andrea, Mathews, Josh, van de Meent, Maarten, Muratore, Martina, Nardini, Germano, Pani, Paolo, Peloso, Marco, Pieroni, Mauro, Pound, Adam, Quelquejay-Leclere, Hippolyte, Ricciardone, Angelo, Rossi, Elena Maria, Sartirana, Andrea, Savalle, Etienne, Sberna, Laura, Sesana, Alberto, Shoemaker, Deirdre, Slutsky, Jacob, Sotiriou, Thomas, Speri, Lorenzo, Staab, Martin, Steer, Danièle, Tamanini, Nicola, Tasinato, Gianmassimo, Torrado, Jesus, Torres-Orjuela, Alejandro, Toubiana, Alexandre, Vallisneri, Michele, Vecchio, Alberto, Volonteri, Marta, Yagi, Kent, Zwick, Lorenz
The Laser Interferometer Space Antenna (LISA) is the first scientific endeavour to detect and study gravitational waves from space. LISA will survey the sky for Gravitational Waves in the 0.1 mHz to 1 Hz frequency band which will enable the study of
Externí odkaz:
http://arxiv.org/abs/2402.07571
Publikováno v:
Phys. Rev. D 109, 084046 (2024)
Deviations from General Relativity can alter the quasi-normal mode (QNM) ringdown of perturbed black holes. It is known that a shift-symmetric (hence massless) scalar can only introduce black hole hair if it couples to the Gauss-Bonnet invariant, in
Externí odkaz:
http://arxiv.org/abs/2311.17666