Navegação Ciências Exatas e da Terra por Assunto "Dark energy"

Resultados 1-5 de 5

    • Exploring modified gravity: constraints on the μ and parametrization with WMAP, ACT, and SPT 

      Andrade, Uendert; Capistrano, Abraão J. S.; Di Valentino, Eleonora; Nunes, Rafael da Costa (2024) [Artigo de periódico]
      The cosmic acceleration problem remains one of the most significant challenges in cosmology. One of the proposed solutions to this problem is the modification of gravity on large scales. In this paper, we explore the ...

    • First cosmology results using SNe Ia from the dark energy survey : analysis, systematic uncertainties, and validation 

      Brout, Dillon J.; Santiago, Basilio Xavier; DES Collaboration (2019) [Artigo de periódico]
      We present the analysis underpinning the measurement of cosmological parameters from 207 spectroscopically classified SNe Ia from the first 3 years of the Dark Energy Survey Supernova Program (DES-SN), spanning a redshift ...

    • Late-time constraints on interacting dark energy : analysis independent of H0, rd, and MB 

      Benisty, David; Pan, Supriya; Staicova, Denitsa; Di Valentino, Eleonora; Nunes, Rafael da Costa (2024) [Artigo de periódico]
      We investigated a possible interaction between cold dark matter and dark energy, corresponding to a well-known interacting dark energy model discussed in the literature within the context of resolving the Hubble tension. ...

    • OzDES multifibre spectroscopy for the Dark Energy Survey : 3-yr results and first data release 

      Childress, Michael; Ostrovski, F.; DES Collaboration (2017) [Artigo de periódico]
      We present results for the first three years of OzDES, a six year programme to obtain redshifts for objects in the Dark Energy Survey (DES) supernova fields using the 2dF fibre positioner and AAOmega spectrograph on the ...

    • Star/galaxy separation at faint magnitudes : application to a simulated Dark Energy Survey 

      Soumagnac, Maayane Tamar; Abdalla, Filipe B.; Lahav, Ofer; Kirk, Donnacha; Sevilla Noarbe, Ignacio; Bertin, Emmanuel; Rowe, Barnaby T. P.; Annis, James T.; Busha, M. T.; Costa, Luiz N. da; Frieman, Joshua A.; Gaztañaga, Enrique; Jarvis, Michael; Lin, H.; Percival, Will J.; Santiago, Basilio Xavier; Sabiu, Cristiano Giovanni; Wechsler, Risa H.; Wolz, Laura; Yanny, Brian (2015) [Artigo de periódico]
      We address the problem of separating stars from galaxies in future large photometric surveys. We focus our analysis on simulations of the Dark Energy Survey (DES). In the first part of the paper, we derive the science ...