Detection and characterisation of the first Planck high-z candidates

作者：Flores Cacho I^*

来源：Astronomische Nachrichten, 2013, 334(4-5): 449-452.

DOI：10.1002/asna.201211878

• cosmic microwave background
• galaxies: clusters: general
• galaxies: clusters: individual (17p732)
• galaxies: high-redshift

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 greater than or similar to 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 similar or equal to 1.7 for which we carried a multi-wavelength follow-up.

• 出版日期2013-5