The extended Baryon Oscillation Spectroscopic Survey: a cosmological forecast

We present a science forecast for the extended Baryon Oscillation Spectroscopic Survey (eBOSS) survey. Focusing on discrete tracers, we forecast the expected accuracy of the baryonic acoustic oscillation (BAO), the redshift-space distortion (RSD) measurements, the fNL parameter quantifying the primo...

Descripción completa

Detalles Bibliográficos
Autores: Zhao, Gong-Bo, Wang, Yuting, Ross, Ashley J., Shandera, Sarah, Percival, Will J., Dawson, Kyle S., Kneib, Jean-Paul, Myers, Adam D., Brownstein, Joel R., Comparat, Johan, Delubac, Timothée, Gao, Pengyuan, Hojjati, Alireza, Koyama, Kazuya, McBride, Cameron K., Meza, Andrés, Newman, Jeffrey A., Palanque-Delabrouille, Nathalie, Pogosian, Levon, Prada, Francisco, Rossi, Graziano, Schneider, Donald P., Seo, Hee-Jong, Tao, Charling, Wang, Dandan, Yèche, Christophe, Zhang, Hanyu, Zhang, Yuecheng, Zhou, Xu, Zhu, Fangzhou, Zou, Hu
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/376567
Acceso en línea:http://hdl.handle.net/10261/376567
Access Level:acceso abierto
Palabra clave:Dark energy
Large-scale structure of Universe
Descripción
Sumario:We present a science forecast for the extended Baryon Oscillation Spectroscopic Survey (eBOSS) survey. Focusing on discrete tracers, we forecast the expected accuracy of the baryonic acoustic oscillation (BAO), the redshift-space distortion (RSD) measurements, the fNL parameter quantifying the primordial non-Gaussianity, the dark energy and modified gravity parameters.We also use the line-of-sight clustering in the Lyman a forest to constrain the total neutrino mass.We find that eBOSS luminous red galaxies, emission line galaxies and clustering quasars can achieve a precision of 1, 2.2 and 1.6 per cent, respectively, for spherically averaged BAO distance measurements. Using the same samples, the constraint on fσ is expected to be 2.5, 3.3 and 2.8 per cent, respectively. For primordial non-Gaussianity, eBOSS alone can reach an accuracy of σ(f) ~ 10-15. eBOSS can at most improve the dark energy figure of merit by a factor of 3 for the Chevallier-Polarski-Linder parametrization, and can well constrain three eigenmodes for the general equation-of-state parameter. eBOSS can also significantly improve constraints on modified gravity parameters by providing the RSD information, which is highly complementary to constraints obtained from weak lensingmeasurements. A principal component analysis shows that eBOSS can measure the eigenmodes of the effective Newton's constant to 2 per cent precision; this is a factor of 10 improvement over that achievable without eBOSS. Finally, we derive the eBOSS constraint (combined with Planck, Dark Energy Survey and BOSS) on the total neutrino mass, σ(Σm) = 0.03 eV (68 per cent CL), which in principle makes it possible to distinguish between the two scenarios of neutrino mass hierarchies. © 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.

Similares en LA Referencia