VST ATLAS galaxy cluster catalogue I: cluster detection and mass calibration
Abstract
ABSTRACT Taking advantage of ∼4700 deg2 optical coverage of the Southern sky offered by the VST ATLAS survey, we construct a new catalogue of photometrically selected galaxy groups and clusters using the orca cluster detection algorithm. The catalogue contains ∼22 000 detections with N200 > 10 and ∼9000 with N200 > 20. We estimate the photometric redshifts of the clusters using machine learning and find the redshift distribution of the sample to extend to z ∼ 0.7, peaking at z ∼ 0.25. We calibrate the ATLAS cluster mass-richness scaling relation using masses from the MCXC, Planck, ACT DR5, and SDSS redMaPPer cluster samples. We estimate the ATLAS sample to be $$\gt 95~{{\ \rm per\ cent}}$$ complete and $$\gt 85~{{\ \rm per\ cent}}$$ pure at z < 0.35 and in the M200m>$$1\times 10^{14}h^{-1}\, \mbox{M}_\odot$$ mass range. At z < 0.35, we also find the ATLAS sample to be more complete than redMaPPer, recovering a $$\sim 40~{{\ \rm per\ cent}}$$ higher fraction of Abell clusters. This higher sample completeness places the amplitude of the z < 0.35 ATLAS cluster mass function closer to the predictions of a ΛCDM model with parameters based on the Planck CMB analyses, compared to the mass functions of the other cluster samples. However, strong tensions between the observed ATLAS mass functions and models remain. We shall present a detailed cosmological analysis of the ATLAS cluster mass functions in paper II. In the future, optical counterparts to X-ray-detected eROSITA clusters can be identified using the ATLAS sample. The catalogue is also well suited for auxiliary spectroscopic target selection in 4MOST. The ATLAS cluster catalogue is publicly available at http://astro.dur.ac.uk/cosmology/vstatlas/cluster_catalogue/.
- Authors:
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1923713
- Resource Type:
- Published Article
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 520 Journal Issue: 1; Journal ID: ISSN 0035-8711
- Publisher:
- Oxford University Press
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Ansarinejad, Behzad, Murphy, David, Shanks, Tom, and Metcalfe, Nigel. VST ATLAS galaxy cluster catalogue I: cluster detection and mass calibration. United Kingdom: N. p., 2023.
Web. doi:10.1093/mnras/stac3815.
Ansarinejad, Behzad, Murphy, David, Shanks, Tom, & Metcalfe, Nigel. VST ATLAS galaxy cluster catalogue I: cluster detection and mass calibration. United Kingdom. https://doi.org/10.1093/mnras/stac3815
Ansarinejad, Behzad, Murphy, David, Shanks, Tom, and Metcalfe, Nigel. Tue .
"VST ATLAS galaxy cluster catalogue I: cluster detection and mass calibration". United Kingdom. https://doi.org/10.1093/mnras/stac3815.
@article{osti_1923713,
title = {VST ATLAS galaxy cluster catalogue I: cluster detection and mass calibration},
author = {Ansarinejad, Behzad and Murphy, David and Shanks, Tom and Metcalfe, Nigel},
abstractNote = {ABSTRACT Taking advantage of ∼4700 deg2 optical coverage of the Southern sky offered by the VST ATLAS survey, we construct a new catalogue of photometrically selected galaxy groups and clusters using the orca cluster detection algorithm. The catalogue contains ∼22 000 detections with N200 > 10 and ∼9000 with N200 > 20. We estimate the photometric redshifts of the clusters using machine learning and find the redshift distribution of the sample to extend to z ∼ 0.7, peaking at z ∼ 0.25. We calibrate the ATLAS cluster mass-richness scaling relation using masses from the MCXC, Planck, ACT DR5, and SDSS redMaPPer cluster samples. We estimate the ATLAS sample to be $\gt 95~{{\ \rm per\ cent}}$ complete and $\gt 85~{{\ \rm per\ cent}}$ pure at z < 0.35 and in the M200m>$1\times 10^{14}h^{-1}\, \mbox{M}_\odot$ mass range. At z < 0.35, we also find the ATLAS sample to be more complete than redMaPPer, recovering a $\sim 40~{{\ \rm per\ cent}}$ higher fraction of Abell clusters. This higher sample completeness places the amplitude of the z < 0.35 ATLAS cluster mass function closer to the predictions of a ΛCDM model with parameters based on the Planck CMB analyses, compared to the mass functions of the other cluster samples. However, strong tensions between the observed ATLAS mass functions and models remain. We shall present a detailed cosmological analysis of the ATLAS cluster mass functions in paper II. In the future, optical counterparts to X-ray-detected eROSITA clusters can be identified using the ATLAS sample. The catalogue is also well suited for auxiliary spectroscopic target selection in 4MOST. The ATLAS cluster catalogue is publicly available at http://astro.dur.ac.uk/cosmology/vstatlas/cluster_catalogue/.},
doi = {10.1093/mnras/stac3815},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 1,
volume = 520,
place = {United Kingdom},
year = {Tue Jan 31 00:00:00 EST 2023},
month = {Tue Jan 31 00:00:00 EST 2023}
}
https://doi.org/10.1093/mnras/stac3815
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