Papers › J-PAS and PFS surveys in the era of dark energy and neutrino mass measurements
J-PAS and PFS surveys in the era of dark energy and neutrino mass measurements
Fuxing Qin, Yuting Wang, Gong-Bo Zhao, Antonio J. Cuesta, Jailson Alcaniz, Gabriel Rodrigues, Miguel Aparicio Resco, Antonio Lopez Maroto, Manuel Masip, Jamerson G. Rodrigues, Felipe B. M. dos Santos, Javier de Cruz Perez, Jorge Enrique Garcia-Farieta, Raul Abramo, Narciso Benitez, Silvia Bonoli, Saulo Carneiro, Javier Cenarro, David Cristobal-Hornillos, Renato Dupke, Alessandro Ederoclite, Antonio Hernan-Caballero, Carlos Hernandez-Monteagudo, Carlos Lopez-Sanjuan, Antonio Marin-Franch, Claudia Mendes de Oliveira, Mariano Moles, Laerte Sodre Jr., Keith Taylor, Jesus Varela, Hector Vazquez Ramio
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Fisher-matrix forecasts are presented for the cosmological surveys of the Javalambre Physics of the Accelerating Universe Astrophysical Survey (J-PAS) and the Subaru Prime Focus Spectrograph (PFS). The wide, low-redshift coverage of J-PAS and the high-density, high-redshift mapping of PFS are strongly complementary: combining the two reduces marginalized uncertainties on all primary parameters compared with either survey individually. Adding the joint J-PAS+PFS data to next-generation CMB measurements from the Simons Observatory (SO) and \textsc{LiteBird} yields an expected precision of σ(∑m_ν)=0.017eV in the ΛCDM+∑m_ν+N_(eff) framework, sufficient to disfavour the inverted neutrino hierarchy at 2.34 σ if the true mass sum equals the normal-ordering minimum. Motivated by recent DESI results, we also forecast within a w₀wₐCDM+∑m_ν+N_(eff) cosmology, adopting the DESI\,DR2 best-fit values (w₀=-0.758, wₐ=-0.82) as fiducial. The combination CMB+J-PAS+PFS then delivers σ(w₀)=0.044 and σ(wₐ)=0.18, corresponding to a 5.1 σ preference for a time-varying dark-energy equation of state. These findings show that J-PAS and PFS, especially when coupled with Stage-IV CMB observations, will provide competitive tests of neutrino physics and the dynamics of cosmic acceleration.
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