J/MNRAS/476/3336 Candidate high-z protoclusters among PCS (Greenslade+, 2018)
Candidate high-z protoclusters among the Planck compact sources,
as revealed by Herschel-SPIRE.
Greenslade J., Clements D.L., Cheng T., De Zotti G., Scott D., Valiante E.,
Eales S., Bremer M.N., Dannerbauer H., Birkinshaw M., Farrah D.,
Harrison D.L., Michalowski M.J., Valtchanov I., Oteo I., Baes M.,
Cooray A., Negrello M., Wang L., van der Werf P., Dunne L., Dye S.
<Mon. Not. R. Astron. Soc., 476, 3336-3359 (2018)>
=2018MNRAS.476.3336G 2018MNRAS.476.3336G (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Millimetric/submm sources ;
Photometry, millimetric/submm
Keywords: galaxies: clusters: general - galaxies: evolution -
galaxies: starburst - submillimetre: galaxies
Abstract:
By determining the nature of all the Planck compact sources within
808.4deg2 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 500um 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)x10-2sources/deg2, 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 353GHz 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.
Description:
Through a cross-match of the Planck compact source catalogues, and
808.4deg2 of Herschel fields from H-ATLAS, HerMES, and HerS, we
have identified 27 protoclusters of DSFGs that are at least 3σ
overdense in either 250, 350, or 500um sources. Additionally, we have
identified, 192 local galaxies, 43 regions of Galactic cirrus, 12
candidate lensed sources, three stars, and two QSOs which also make up
the Planck compact source catalogues. A further 61 sources we are
unable to assign a classification, but many host a large number of
Herschel sources (>2σ in the 250, 350, or 500um bands), and
other have colours indicative of a high-redshift origin.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 106 300 Candidate protoclusters from the Planck 857GHz
catalogues of compact sources
tableb2.dat 99 115 Candidate protoclusters from the Planck 545GHz
catalogues of compact sources
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See also:
VIII/88 : Planck Early Release Compact Source Catalogue
(Planck Coll., 2011)
J/A+A/594/A26 : Second Planck Catalogue of Compact Sources (PCCS2)
(Planck Coll., 2016)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 24 A24 --- Name Name (1)
26- 32 F7.3 deg RAdeg Right ascension (J2000)
34- 40 F7.3 deg DEdeg Declination (J2000)
42- 77 A36 --- Assoc Associations
79- 83 I5 mJy F857 Planck 857GHz flux
85- 88 I4 mJy e_F857 rms uncertainty on F857
90- 94 F5.2 --- sigma250 Strength of the overdensity at 250um
96-100 F5.2 --- sigma350 Strength of the overdensity at 350um
102-106 F5.2 --- sigma500 ?=- Strength of the overdensity at 500um
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Note (1): Planck 857GHz names, as PCCS1 857 GLLL.ll+BB.bbb,
PCCS2 857 GLLL.ll+BB.bbb and PLCKERC857 GLLL.ll+BB.bbb .
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Byte-by-byte Description of file: tableb2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 24 A24 --- Name Name (1)
26- 32 F7.3 deg RAdeg Right ascension (J2000)
34- 40 F7.3 deg DEdeg Declination (J2000)
42- 72 A31 --- Assoc Associations
74- 77 I4 mJy F545 Planck 545GHz flux
79- 81 I3 mJy e_F545 rms uncertainty on F545
83- 87 F5.2 --- sigma250 Strength of the overdensity at 250um
89- 93 F5.2 --- sigma350 ?=- Strength of the overdensity at 350um
95- 99 F5.2 --- sigma500 ?=- Strength of the overdensity at 500um
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Note (1): Planck 545GHz names, as PCCS1 545 GLLL.ll+BB.bbb,
PCCS2 545 GLLL.ll+BB.bbb and PLCKERC545 GLLL.ll+BB.bbb .
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History:
From electronic version of the journal
References:
Planck collaboration, 2011A&A...536A...7P 2011A&A...536A...7P, Cat. VIII/88,
Planck early results. VII. The early Release Compact Source Catalogue
Planck collaboration, 2014A&A...571A..28P 2014A&A...571A..28P,
Planck 2013 results. XXVIII. The Planck Catalogue of Compact Sources
Planck collaboration, 2016A&A...594A..26P 2016A&A...594A..26P, Cat. J/A+A/594/A26
Planck 2015 results. XXVI. The Second Planck Catalogue of Compact Sources
(End) Patricia Vannier [CDS] 27-Apr-2021