Bibcode
Aguado-Barahona, A.; Barrena, R.; Strebyanska, A.; Ferragamo, A.; Rubino-Martin, J. A.
Referencia bibliográfica
Highlights on Spanish Astrophysics X, Proceedings of the XIII Scientific Meeting of the Spanish Astronomical Society held on July 16-20, 2018, in Salamanca, Spain, ISBN 978-84-09-09331-1. B. Montesinos, A. Asensio Ramos, F. Buitrago, R. Schödel, E. Villaver, S. Pérez-Hoyos, I. Ordóñez-Etxeberria (eds.) p. 201-201
Advertised on:
3
2019
Número de citas
0
Número de citas referidas
0
Descripción
The Legacy PLANCK all-sky Sunyaev-Zeldovich (SZ) galaxy cluster
catalogues PSZ1 and PSZ2 (Planck Collaboration XXIX 2013; Planck
Collaboration XXVII 2015) provide for the first time the possibility to
detect galaxy clusters using the SZ effect signature in a full sky
survey. However, in order to constrain cosmological parameters from
these catalogues, the clusters must be characterized in their physical
properties, mainly redshift and mass. Here, we describe our optical
follow-up programme, which has been developed with the aim of validating
SZ Planck sources with no known optical counterparts. Thanks to a 4-year
observational programme, using the 4.2m WHT and 2.5m INT telescopes at
the Observatorio Roque de los Muchachos (La Palma), we identify the
optical counterparts of the SZ candidates and estimate their photo-z's.
After this, we study spectroscopically a significant sample of the
confirmed clusters. We perform multi-object spectroscopy (MOS) with the
3.5m TNG and 10.4m GTC telescopes, in order to retrieve redshifts,
velocity dispersions and dynamical masses. This allows us to compare SZ
masses with dynamical ones and calibrate the uncertainties in this
scaling laws understanding possible biases. This poster presents the
status of the imaging observations (more than 400 objects observed), the
spectroscopic observations (more than 120 MOS masks), and the first
scientific results of this programme.