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Candidate high-z protoclusters among the Planck compact sources, as revealed by Herschel-SPIRE

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Title: Candidate high-z protoclusters among the Planck compact sources, as revealed by Herschel-SPIRE
Authors: Greenslade, J
Clements, DL
Cheng, T
De Zotti, G
Scott, D
Valiante, E
Eales, S
Bremer, MN
Dannerbauer, H
Birkinshaw, M
Farrah, D
Harrison, DL
Michalowski, MJ
Valtchanov, I
Oteo, I
Baes, M
Cooray, A
Negrello, M
Wang, L
Van der Werf, P
Dunne, L
Dye, S
Item Type: Journal Article
Abstract: By determining the nature of all the Planck compact sources within 808.4 deg2 of large Herschel surveys, we have identified 27 candidate protoclusters of dusty star-forming galaxies (DSFGs) that are at least 3σ overdense in either 250, 350, or 500 μ m sources. We find roughly half of all the Planck compact sources are resolved by Herschel into multiple discrete objects, with the other half remaining unresolved by Herschel. We find a significant difference between versions of the Planck catalogues, with earlier releases hosting a larger fraction of candidate protoclusters and Galactic cirrus than later releases, which we ascribe to a difference in the filters used in the creation of the three catalogues. We find a surface density of DSFG candidate protoclusters of (3.3 ± 0.7) × 10−2 sources deg−2, in good agreement with previous similar studies. We find that a Planck colour selection of S857/S545 < 2 works well to select candidate protoclusters, but can miss protoclusters at z < 2. The Herschel colours of individual candidate protocluster members indicate our candidate protoclusters all likely all lie at z > 1. Our candidate protoclusters are a factor of 5 times brighter at 353 GHz than expected from simulations, even in the most conservative estimates. Further observations are needed to confirm whether these candidate protoclusters are physical clusters, multiple protoclusters along the line of sight, or chance alignments of unassociated sources.
Issue Date: 1-May-2018
Date of Acceptance: 20-Dec-2017
URI: http://hdl.handle.net/10044/1/60283
DOI: https://dx.doi.org/10.1093/mnras/sty023
ISSN: 0035-8711
Publisher: Oxford University Press (OUP)
Start Page: 3336
End Page: 3359
Journal / Book Title: Monthly Notices of the Royal Astronomical Society
Volume: 476
Issue: 3
Copyright Statement: © 2018 Oxford University Press. The definitive publisher-authenticated version, Monthly Notices of the Royal Astronomical Society, Volume 476, Issue 3, 21 May 2018, Pages 3336–3359, is available online at: https://dx.doi.org/10.1093/mnras/sty023
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Imperial College Trust
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council
Science and Technology Facilities Council (STFC)
Funder's Grant Number: SPIRE/SOW/07020F
ST/G001057/1
ST/F01239X/1
ST/F012373/1
ST/H001239/1
ST/G001901/1
ST/G003874/1
ST/I005765/1
ST/J004812/1
ST/J001368/1
N/A
ST/L001314/1
ST/K006401/1
ST/K004131/1
ST/M003558/1
ST/P000568/1
ST/N005317/1
ST-N000838
ST/N000838/1
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
galaxies: clusters: general
galaxies: evolution
galaxies: starburst
submillimetre: galaxies
STAR-FORMING GALAXIES
REDSHIFT DUSTY GALAXIES
SUBMILLIMETER GALAXIES
CLUSTER CATALOG
NUMBER COUNTS
DEEP FIELD
FOLLOW-UP
H-ATLAS
OVERDENSITY
POPULATION
0201 Astronomical And Space Sciences
Publication Status: Published
Open Access location: https://arxiv.org/pdf/1712.07141.pdf
Online Publication Date: 2018-01-11
Appears in Collections:Physics
Astrophysics



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