Detalles de publicación
PP 018013
Extracting cosmological information from the angular power spectrum of the 2MASS Photometric Redshift catalogue
Instituto de Astrofísica de Canarias, s/n, E-38205, La Laguna, Tenerife, Spain
Departamento de Astrofísica, Universidad de La Laguna, E-38206, La Laguna, Tenerife, Spain
Leiden Observatory, Leiden University, Niels Bohrweg 2, NL-2333 CA Leiden, The Netherlands
National Centre for Nuclear Research, Astrophysics Division, P.O. Box 447, 90-950 L´od´z, Poland
5Janusz Gil Institute of Astronomy, University of Zielona G´ora, ul. Licealna 9, 65-417 Zielona G´ora, Poland
Dipartamento di Fisica, Universit´a degli Studi Roma Tre, Via della Vasca Navale 84, Rome 00146, Italy
INFN Sezione di Roma 3, Via della Vasca Navale 84, Rome 00146, Italy
INAF, Osservatorio Astronomico di Roma, Monte Porzio Catone, Italy
Using the almost all-sky 2MASS Photometric Redshift catalogue (2MPZ) we perform for the first time a tomographic analysis of galaxy angular clustering in the local Universe ($z<0.24$). We estimate the angular auto- and cross-power spectra of 2MPZ galaxies in three photometric redshift bins, and use dedicated mock catalogues to assess their errors. We measure a subset of cosmological parameters, having fixed the others at their Planck values, namely the baryon fraction $f_{b}=0.14^{+0.09}_{-0.06}$, the total matter density parameter $\Omega_{\rm m}=0.30\pm 0.06$, and the effective linear bias of 2MPZ galaxies $b_{\rm eff}$, which grows from $1.1^{+0.3}_{-0.4}$ at $\langle z \rangle=0.05$ up to $2.1^{+0.3}_{-0.5}$ at $\langle z\rangle=0.2$, largely because of the flux-limited nature of the dataset. The results obtained here for the local Universe agree with those derived with the same methodology at higher redshifts, and confirm the importance of the tomographic technique for next-generation photometric surveys such as Euclid or LSST.