Premium
Detection and characterisation of the first Planck high‐ z candidates
Author(s) -
FloresCacho I.
Publication year - 2013
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201211878
Subject(s) - planck , physics , astrophysics , galaxy , sky , astronomy , galaxy cluster , halo , millimeter , star formation , cosmic microwave background , cluster (spacecraft) , optics , computer science , programming language , anisotropy
With its unprecedented ability to scrutinise the sub‐millimetre (sub‐mm) to centimetre full sky, the Planck satellite is uniquely suited to search for the progenitors of clusters of galaxies. The forming massive halos at z ≳1–2 are expected to host massive galaxies with high star formation rates. Clustered in the growing potential well that is being established, these galaxies are within Planck 's reach via their sub‐mm emission. We have applied a new colour‐based method combining Planck and IRAS data to detect the rarest and brightest sub‐mm cold sources on the sky. In this work, we describe the method and present the first confirmations of our high‐ z candidates, particularly focusing on 17p732, a newly discovered high‐ z (proto)cluster candidate at z ⋍ 1.7 for which we carried a multi‐wavelength follow‐up. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)