Zobrazeno 1 - 10
of 287
pro vyhledávání: '"Marra, Valerio"'
Measurements of the redshift drift -- the real time variation of the redshift of distance sources -- are expected in the next couple of decades using next generation facilities such as the ANDES spectrograph at the ELT and the SKAO survey. The unprec
Externí odkaz:
http://arxiv.org/abs/2409.09977
Autor:
Alfradique, Viviane, Castro, Tiago, Marra, Valerio, Quartin, Miguel, Giocoli, Carlo, Monaco, Pierluigi
Gravitational lensing is a crucial tool for exploring cosmic phenomena, providing insights into galaxy clustering, dark matter, and dark energy. Given the substantial computational demands of $N$-body simulations, approximate methods like $\texttt{PI
Externí odkaz:
http://arxiv.org/abs/2405.00147
Publikováno v:
JCAP09(2024)077
The cosmological principle posits that the universe is statistically homogeneous and isotropic on large scales, implying all matter shares the same rest frame. This principle suggests that velocity estimates of our motion from various sources should
Externí odkaz:
http://arxiv.org/abs/2403.14580
Autor:
Pérez-Ràfols, Ignasi, Abramo, L. Raul, Martínez-Solaeche, Ginés, Pieri, Matthew M., Queiroz, Carolina, Rodrigues, Natália V. N., Bonoli, Silvia, Chaves-Montero, Jonás, Morrison, Sean S., Alcaniz, Jailson, Benitez, Narciso, Carneiro, Saulo, Cenarro, Javier, Cristóbal-Hornillos, David, Dupke, Renato, Ederoclite, Alessandro, Delgado, Rosa M. González, Hernán-Caballero, Antonio, López-Sanjuan, Carlos, Marín-Franch, Antonio, Marra, Valerio, de Oliveira, Claudia Mendes, Moles, Mariano, Sodré Jr., Laerte, Taylor, Keith, Varela, Jesús, Ramió, Héctor Vázquez
Publikováno v:
A&A 678, A144 (2023)
We present a list of quasar candidates including photometric redshift estimates from the miniJPAS Data Release constructed using SQUEzE. This work is based on machine-learning classification of photometric data of quasar candidates using SQUEzE. It h
Externí odkaz:
http://arxiv.org/abs/2309.00461
Autor:
Frion, Emmanuel, Camarena, David, Giani, Leonardo, Miranda, Tays, Bertacca, Daniele, Marra, Valerio, Piattella, Oliver F.
Publikováno v:
The Open Journal of Astrophysics, Volume 7, 2024
We consider cosmological models in which Dark Matter (DM) and Dark Energy (DE) are described by a single component, dubbed Unified Dark Matter (UDM) models, in which the DE-like part can have an equation state $<-1$ at late times without violating th
Externí odkaz:
http://arxiv.org/abs/2307.06320
Autor:
Camarena, David, Marra, Valerio
Publikováno v:
The Hubble Constant Tension, Springer 2024
This study aims to elucidate the tension in the Hubble constant ($H_0$), a key metric in cosmology representing the universe's expansion rate. Conflicting results from independent measurements such as the Planck satellite mission and the SH0ES collab
Externí odkaz:
http://arxiv.org/abs/2307.02434
Autor:
Rodrigues, Natália V. N., Abramo, L. Raul, Queiroz, Carolina, Martínez-Solaeche, Ginés, Pérez-Ràfols, Ignasi, Bonoli, Silvia, Chaves-Montero, Jonás, Pieri, Matthew M., Delgado, Rosa M. González, Morrison, Sean S., Marra, Valerio, Márquez, Isabel, Hernán-Caballero, A., Díaz-García, L. A., Benítez, Narciso, Cenarro, A. Javier, Dupke, Renato A., Ederoclite, Alessandro, López-Sanjuan, Carlos, Marín-Franch, Antonio, de Oliveira, Claudia Mendes, Moles, Mariano, Sodré Jr., Laerte, Varela, Jesús, Ramió, Héctor Vázquez, Taylor, Keith
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 2023, 520, 3494-3509
Astrophysical surveys rely heavily on the classification of sources as stars, galaxies or quasars from multi-band photometry. Surveys in narrow-band filters allow for greater discriminatory power, but the variety of different types and redshifts of t
Externí odkaz:
http://arxiv.org/abs/2303.00489
Autor:
Adhikari, Rana X., Anchordoqui, Luis A., Fang, Ke, Sathyaprakash, B. S., Tollefson, Kirsten, Lewis, Tiffany R., Engel, Kristi, Aboubrahim, Amin, Akarsu, Ozgur, Akrami, Yashar, Aloisio, Roberto, Batista, Rafael Alves, Ballardini, Mario, Ballmer, Stefan W., Bechtol, Ellen, Benisty, David, Berti, Emanuele, Birrer, Simon, Bonilla, Alexander, Brito, Richard, Bustamante, Mauricio, Caldwell, Robert, Cardoso, Vitor, Chakrabarti, Sukanya, Chen, Thomas Y., Cicoli, Michele, Clesse, Sebastien, Coleman, Alan, Cui, Yanou, Cusin, Giulia, Daylan, Tansu, Dienes, Keith R., Di Valentino, Eleonora, Dvorkin, Cora, Escamilla-Rivera, Celia, Farrar, Glennys R., Feng, Jonathan L., Frusciante, Noemi, Garcia-Bellido, Juan, Canal, Carlos Garcia, Garzelli, Maria Vittoria, Glombitza, Jonas, Golup, Geraldina, Gritsevich, Maria, Haiman, Zoltan, Haro, Jaume, Hazra, Dhiraj Kumar, Heavens, Alan, Holz, Daniel, Horandel, Jorg R., Ishak, Mustapha, Ivanov, Mikhail M., Joudaki, Shahab, Kampert, Karl-Heinz, Karwin, Christopher M., Keeley, Ryan, Klasen, Michael, Konoplich, Rostislav, Krizmanic, John F., Kumar, Suresh, L'Huillier, Benjamin, Levi, Noam, Mandic, Vuk, Marra, Valerio, Martins, C. J. A. P., Matarrese, Sabino, Mayotte, Eric, Mayotte, Sonja, Mersini-Houghton, Laura, Meyers, Joel, Miller, Andrew L., Mottola, Emil, Mukherjee, Suvodip, Murase, Kohta, Muzio, Marco Stein, Nath, Pran, Ng, Ken K. Y., No, Jose Miguel, Nunes, Rafael C., Olinto, Angela V., Pace, Francesco, Pan, Supriya, Bergliaffa, Santiago E. Perez, Pogosian, Levon, Read, Jocelyn, Reininghaus, Maximilian, Reno, Mary Hall, Riess, Adam G., Sakellariadou, Mairi, Sakharov, Alexander S., Salucci, Paolo, Santander, Marcos, Santos, Eva, Sarazin, Fred, Saridakis, Emmanuel N., Sciutto, Sergio J., Shafieloo, Arman, Shoemaker, David H., Sinha, Kuver, Soldin, Dennis, Soriano, Jorge F., Staicova, Denitsa, Sun, Ling, Steer, D. A., Thomas, Brooks, Tomsick, John A., Valera, Victor B., Vazquez, J. Alberto, Venters, Tonia M., Visinelli, Luca, Watson, Scott, Webb, John K., Weltman, Amanda, White, Graham, Wissel, Stephanie, Yadav, Anil Kumar, Yang, Fengwei, Yang, Weiqiang, Yunes, Nicolas, Yushkov, Alexey, Zhang, Haocheng
Cosmic Probes of Fundamental Physics take two primary forms: Very high energy particles (cosmic rays, neutrinos, and gamma rays) and gravitational waves. Already today, these probes give access to fundamental physics not available by any other means,
Externí odkaz:
http://arxiv.org/abs/2209.11726
Publikováno v:
Class. Quantum Grav. 39 184001 (2022)
The Universe may feature large-scale inhomogeneities beyond the standard paradigm, implying that statistical homogeneity and isotropy may be reached only on much larger scales than the usually assumed $\sim$100 Mpc. This means that we are not necessa
Externí odkaz:
http://arxiv.org/abs/2205.05422
Publikováno v:
Phys. Rev. D 105, 083507 (2022)
The runaway collapse phase of a small dark matter cluster inside a white dwarf star encompasses a reversible stage, where heat can be transferred back and forth between nuclear and dark matter. Induced nuclear burning phases are stable and early carb
Externí odkaz:
http://arxiv.org/abs/2203.09054