Ultra luminous dusty galaxies radiating most of their energy in the far IR are now known from Spitzer IR and submillimeter observations to dominate the integrated luminosity at redshift 2 to 3. The behavior of this population at higher redshifts remains poorly constrained. This proposal is based on the use of the Planck all sky survey at millimeter and submillimeter wavelengths to find new and rare high-z candidate sources. The limited angular resolution requires a specific data processing to extract good candidates. The Cosmic Infrared Background (CIB) is observed with high signal to noise by Planck after a specific component separation. An algorithm detecting cold spots on the CIB (thus potentially high z dominated) compatible with point sources has been developed. These high z blobs have been shown to be a mixture of different type of objects. Among these, new high z ULIRGS at the high end of the luminosity function or lensed, or high z large scale structures are very interesting for galaxy evolution. We performed comparison of the Planck data with new unidentified sources found by SPT near the upper end of their luminosity function and we detected a few of them. Furthermore, the stacking in Planck of 34 of these SPT sources is easily detected in Planck and gives a typical SED in the Planck bands for these sources. We thus selected sources with this type of SED in the Planck data and produced a list of 10 candidates proposed in this program for observations with SPIRE and PACS. We propose an observation allowing to study the nature of these 10 cold blobs in three cases covering well the possible contributors to this Planck detected high z blobs (single source, cluster of 10 to 20 sources, structure of the cold CIB spot if a small number of sources has not been found).This should be a very interesting contribution to the study of this new emerging population. Furthermore this program should allow us to use best the Planck all sky survey later to find more candidates.
Publication
Planck intermediate results. XXVII. High-redshift infrared galaxy overdensity candidates and lensed sources discovered by Planck and confirmed by Herschel-SPIRE | Planck Collaboration Aghanim et al. | Astronomy & Astrophysics Volume 582 id.A30 29 pp. | 582 | 10.1051\\/0004-6361\\/201424790 | 2015A&A...582A..30P | http://adsabs.harvard.edu/abs/2015A%26A...582A..30P
Multi-wavelength characterisation of z virgul 2 clustered, dusty star-forming galaxies discovered by Planck | Flores-Cacho I. et al. | Astronomy & Astrophysics Volume 585 id.A54 15 pp. | 585 | 10.1051\\/0004-6361\\/201425226 | 2016A&A...585A..54F | http://adsabs.harvard.edu/abs/2016A%26A...585A..54F
Spitzer Planck Herschel Infrared Cluster (SPHerIC) survey: Candidate galaxy clusters at 1.3 < z < 3 selected by high star-formation rate | Martinache C. et al. | Astronomy & Astrophysics Volume 620 id.A198 18 pp. | 620 | 10.1051\\/0004-6361\\/201833198 | 2018A&A...620A.198M | http://adsabs.harvard.edu/abs/2018A%26A...620A.198M
Instrument
SPIRE_SpirePhoto_large
Temporal Coverage
2011-01-07T10:53:49Z/2013-03-25T06:10:48Z
Version
SPG v14.1.0
Mission Description
Herschel was launched on 14 May 2009! It is the fourth cornerstone mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
European Space Agency, montier et al., 2013, 'Dissecting the nature of the Planck-HFI high-z blobs', SPG v14.1.0, European Space Agency, https://doi.org/10.5270/esa-pk48g5c
