Abstract
We present SCUBA-2 850 μm observations of 13 candidate starbursting
protoclusters selected using Planck and Herschel data. The cumulative
number counts of the 850 μm sources in 9 of 13 of these candidate
protoclusters show significant overdensities compared to the field, with
the probability 2 protoclusters and the peak
of the cosmic star formation rate density (SFRD). We find that the 850
μm sources in our candidate protoclusters have infrared luminosities
of L_{IR}≳ 10^{12} L_{\odot } and star formation rates of SFR =
(500-1500) M⊙ yr-1. By comparing with results
in the literature considering only Herschel photometry, we conclude that
our 13 candidate protoclusters can be categorized into four groups: six
of them being high-redshift starbursting protoclusters, one being a
lower redshift cluster or protocluster, three being protoclusters that
contain lensed dusty star-forming galaxies or are rich in 850 μm
sources, and three regions without significant Herschel or SCUBA-2
source overdensities. The total SFRs of the candidate protoclusters are
found to be comparable or higher than those of known protoclusters,
suggesting our sample contains some of the most extreme protocluster
population. We infer that cross-matching Planck and Herschel data is a
robust method for selecting candidate protoclusters with overdensities
of 850 μm sources.
Original language | English |
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Pages (from-to) | 3840-3859 |
Number of pages | 20 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 490 |
Issue number | 3 |
Early online date | 21 Sept 2019 |
DOIs | |
Publication status | Published - 1 Dec 2019 |
Keywords
- galaxies: high-redshift
- galaxies: starburst
- submillimetre: galaxies