Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Nunes, Rafael"'
We explore observational constraints on a cosmological model with an interaction between dark energy (DE) and dark matter (DM), using a compilation of 15 measurements of the 2D BAO (i.e., transversal) scale in combination with Planck-CMB data, to exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eef739f63e926d93acbb70ca72b665b3
http://arxiv.org/abs/2301.06097
http://arxiv.org/abs/2301.06097
Modification of general relativity (GR) inspired by theories like $f(R)$ gravity is among the most popular ones to explain the late-time acceleration of the Universe as an alternative to the $\Lambda$CDM model. In this work, we use the state-of-the-a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b686c06067cd0993fb43ba56e2209a26
Autor:
Adil, Shahnawaz A., Akarsu, Ozgur, Di Valentino, Eleonora, Nunes, Rafael C., Ozulker, Emre, Sen, Anjan A., Specogna, Enrico
This paper introduces the class of omnipotent dark energy (DE) models characterized by non-monotonic energy densities that are capable of attaining negative values with corresponding equation of state parameters featuring phantom divide line (PDL) cr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68772a10455b741778a4f8aee3f031c1
Autor:
Zhai, Yuejia, Giarè, William, van de Bruck, Carsten, Di Valentino, Eleonora, Mena, Olga, Nunes, Rafael C.
We analyze a cosmological model featuring an interaction between dark energy and dark matter in light of the measurements of the Cosmic Microwave Background released by three independent experiments: the most recent data by the Planck satellite and t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3aa1b206a659fa5bee2a0c08e1d4eb4
We investigate two new observational perspectives in the context of torsional gravitational modification of general relativity, i.e., the $f(T)$ gravity: i) We use Pantheon data of type Ia supernovae motivated by a time variation of the Newton's cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a2623883d3199440c78ac9e0264a901
http://arxiv.org/abs/2209.11131
http://arxiv.org/abs/2209.11131
Autor:
de Lima, Rafael C. R., Pereira, Jonas P., Coelho, Jaziel G., Nunes, Rafael C., Stecchini, Paulo E. F., Castro, Manuel, Gomes, Pierre, da Silva, Rodrigo R., Rodrigues, Claudia V., de Araujo, José C. N., Bejger, Michał, Haensel, Paweł, Zdunik, J. Leszek
3XMM J185246.6+003317 is a slowly rotating soft-gamma repeater (neutron star) in the vicinity of the supernova remnant Kes\,79. So far, observations have only set upper limits to its surface magnetic field and spindown, and there is no estimate for i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac7bf84614736ab3be24a4056395f04c
Forecasting constraints on deviations from general relativity in $f(Q)$ gravity with standard sirens
Autor:
D'Agostino, Rocco, Nunes, Rafael C.
In this work, we explore how modified gravity theories based on the non-metricity scalar, known as $f(Q)$ gravity, affect the propagation of gravitational waves from inspiraling of binary systems. We discuss forecast constraints on $f(Q)$ gravity by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1fd30a704524b47234dee84311f7328
In this work, we constraint a possible time variation of the fine structure constant ($\alpha$) within the context of the so-called runaway dilaton model. The limits are performed by using the pantheon supernova Ia sample and strong gravitational len
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11331c167dcfe1957fa20153782bc722
Autor:
Akarsu, Ozgur, Katirci, Nihan, Kumar, Suresh, Nunes, Rafael C., Ozturk, Burcu, Sharma, Shivani
We present a detailed investigation of the Rastall gravity extension of the standard $��$CDM model. We review the model for two simultaneous modifications of different nature in the Friedmann equation due to the Rastall gravity: the new contribut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9521cf5e613fa40e73ebe81d96224445
Publikováno v:
Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Scopus
The direct detection of gravitational waves (GWs) opened a new chapter in the modern cosmology to probe possible deviations from the general relativity (GR) theory. In the present work, we investigate for the first time the modified GW form propagati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba3edee8e2d48fd87a616fa3b58c272e