J/MNRAS/531/1998 ComPACT, ACT+Planck galaxy cluster cat. (Voskresenskaia+, 2024)
ComPACT: combined Atacama Cosmology Telescope + Planck galaxy cluster catalogue
Voskresenskaia S., Meshcheryakov A., Lyskova N.
<Mon. Not. R. Astron. Soc. 531, 1998-2010 (2024)>
=2024MNRAS.531.1998V 2024MNRAS.531.1998V (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Combined data
Keywords: methods: data analysis - catalogues - galaxies: clusters: general
Abstract:
Galaxy clusters are the most massive gravitationally bound systems
consisting of dark matter, hot baryonic gas and stars. They play an
important role in observational cosmology and galaxy evolution
studies. We develop a deep learning model for segmentation of
Sunyaev-Zeldovich (SZ) signal on ACT+Planck intensity maps and
construct a pipeline for microwave cluster detection in the ACT
footprint. The proposed model allows us to identify previously unknown
galaxy clusters, i.e. it is capable of detecting SZ sources below the
detection threshold adopted in the published galaxy clusters
catalogues (such as ACT DR5 and PSZ2). In this paper, we use the
derived SZ signal map to considerably improve a cluster purity in the
extended catalogue of Sunyaev-Zeldovich objects from Planck data
(SZcat) in the ACT footprint. From SZcat, we create a new microwave
galaxy cluster catalogue (ComPACT), which includes 2962 SZ objects
with cluster purity conservatively estimated as ≳74-84%. We
categorise objects in the catalogue into 3 categories, based on their
cluster reliability. Within the ComPACT catalogue, there are ≳977
new clusters with respect to the ACT DR5 and PSZ2 catalogues.
Description:
We use the derived SZ signal map to considerably improve cluster
purity in the SZcat in the ACT footprint. From SZcat, we create a new
microwave galaxy cluster catalogue (ComPACT), which contains 2962
SZ-objects with cluster purity conservatively estimated as ≳74-84
per cent. We categorize objects in the catalogue into three
categories according to their cluster reliability. The ComPACT
catalogue includes more than 977 new clusters (with respect to ACT DR5
and PSZ2 catalogues).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
compact.dat 124 2962 Galaxy cluster catalogue
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See also:
J/A+A/594/A27 : Planck Sunyaev-Zeldovich sources (PSZ2) (Planck+, 2016)
J/ApJS/253/3 : Sunyaev-Zel'dovich galaxy clusters surveyed by ACT
(Hilton+, 2021)
Byte-by-byte Description of file: compact.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Name ID of a ComPACT candidate
25- 33 F9.5 deg RAdeg Right ascension (J2000)
35- 43 F9.5 deg DEdeg Declination (J2000)
45- 47 I3 pix S Object mask area in pixels
49- 66 F18.16 --- pmax Maximum probability for an object
68- 83 A16 --- SZcat Name of the object from the SZcat catalogue (1)
85-103 A19 --- ACT Cluster name in the ACT DR5 catalogue (2)
105-122 A18 --- PSZ2 PSZ2 source name (3)
124 I1 --- Priority [1/3] Reliability of candidate along S area (4)
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Note (1): SZcatgen: https://github.com/astromining/planck_szcat),
Meshcheryakov et al. 2022AstL...48..479M 2022AstL...48..479M
Note (2): ACT DR5:
https://lambda.gsfc.nasa.gov/product/act/actpol_dr5_szcluster_catalog_get.html,
Hilton et al., 2021ApJS..253....3H 2021ApJS..253....3H, Cat. J/ApJS/253/3
Note (3): PSZ2: Cat. J/A+A/594/A27, Planck Collobaration, 2016A&A...594A..27P 2016A&A...594A..27P
Note (4): Reliability as follows:
1 = S>30 (Puritymin=0.84)
2 = S>25 (Puritymin=0.78)
3 = S>20 (Puritymin=0.74)
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Acknowledgements:
Svetlana Voskresenskaia, voskr(at)cosmos.ru
(End) Patricia Vannier [CDS] 21-May-2024