2022A&A...661A..14R

Query : 2022A&A...661A..14R

2022A&A...661A..14R - Astronomy and Astrophysics, volume 661A14-14 (2022/5-1)

The eROSITA Final Equatorial-Depth Survey (eFEDS). A complete census of X-ray properties of Subaru Hyper Suprime-Cam weak lensing shear-selected clusters in the eFEDS footprint.

RAMOS-CEJA M.E., OGURI M., MIYAZAKI S., GHIRARDINI V., CHIU I., OKABE N., LIU A., SCHRABBACK T., AKINO D., BAHAR Y.E., BULBUL E., CLERC N., COMPARAT J., GRANDIS S., KLEIN M., LIN Y.-T., MERLONI A., MITSUISHI I., MIYATAKE H., MORE S., NANDRA K., NISHIZAWA A.J., OTA N., PACAUD F., REIPRICH T.H. and SANDERS J.S.

Abstract (from CDS):


Context. The eFEDS survey is a proof-of-concept mini-survey designed to demonstrate the survey science capabilities of SRG/eROSITA. It covers an area of 140 deg2 where ∼540 galaxy clusters have been detected out to a redshift of 1.3. The eFEDS field is partly embedded in the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) S19A data release, which covers ∼510 deg2, containing approximately 36 million galaxies. This galaxy catalogue has been used to construct a sample of ∼180 shear-selected galaxy clusters. The common area to both surveys covers about 90 deg2, making it an ideal region to study galaxy clusters selected in different ways.
Aims. The aim of this work is to investigate the effects of selection methods in the galaxy cluster detection by comparing the X-ray selected, eFEDS, and the shear-selected, HSC-SSP S19A, galaxy cluster samples. There are 25 shear-selected clusters in the eFEDS fooprint.
Methods. The relation between X-ray bolometric luminosity and weak-lensing mass is investigated (Lbol - M relation), comparing this relation derived from a shear-selected cluster sample to the relation obtained from an X-ray selected sample. Moreover, the dynamical state of the shear-selected clusters is investigated and compared to the X-ray selected sample using X-ray morphological parameters and galaxy distribution.
Results. The normalisation of the Lbol - M relation of the X-ray selected and shear-selected samples is consistent within 1σ-. Moreover, the dynamical state and merger fraction of the shear-selected clusters is not different from the X-ray selected ones. Four shear-selected clusters are undetected in X-rays. A close inspection reveals that one is the result of projection effects, while the other three have an X-ray flux below the ultimate eROSITA detection limit. Finally, 43% of the shear-selected clusters lie in superclusters.
Conclusions. Our results indicate that the scaling relation between X-ray bolometric luminosity and true cluster mass of the shear-selected cluster sample is consistent with the eFEDS sample. There is no significant population of X-ray underluminous clusters, indicating that X-ray selected cluster samples are complete and can be used as an accurate cosmological probe.

Abstract Copyright: © M. E. Ramos-Ceja et al. 2022

Journal keyword(s): galaxies: clusters: general - large-scale structure of Universe - galaxies: clusters: intracluster medium - X-rays: galaxies: clusters

VizieR on-line data: <Available at CDS (J/A+A/661/A14): table1.dat>

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 eFEDS J083654.6+025954 ClG 08 36 54.6 +02 59 54           ~ 5 0
2 AK3 J084128.08+002641 ClG 08 41 28.138 +00 26 40.51           ~ 8 0
3 eFEDS J084528.6+032739 ClG 08 45 28.7 +03 27 39           ~ 5 0
4 eFEDS J085230.6+002457 ClG 08 52 30.6 +00 24 57           ~ 5 0
5 eFEDS J085751.6+031039 ClG 08 57 51.65634486 +03 10 39.4817516           ~ 8 0
6 ACT-CL J0859.4+0308 ClG 08 59 32.3 +03 08 41           ~ 12 0
7 eFEDS J090805.9+011952 ClG 09 08 06.263 +01 19 55.55           ~ 8 0
8 eFEDS J091351.1-004507 ClG 09 13 51.2 -00 45 07           ~ 6 0
9 eFEDS J091403.3+013846 ClG 09 14 03.4 +01 38 47           ~ 8 0
10 eFEDS J091610.1-002348 ClG 09 16 10.18170970 -00 23 48.8577351           ~ 8 0
11 AK3 J091850.16+021208 ClG 09 18 50.2 +02 12 03           ~ 12 0
12 ACT-CL J0921.3+0317 ClG 09 21 21.1 +03 17 13           ~ 13 0
13 eFEDS J092209.3+034628 ClG 09 22 09.4 +03 46 29           ~ 5 0
14 eFEDS J092241.9+020719 ClG 09 22 42.0 +02 07 20           ~ 6 0
15 eFEDS J092844.0+005318 ClG 09 28 44.0 +00 53 19           ~ 5 0
16 eFEDS J092846.5+000056 ClG 09 28 46.6 +00 00 57           ~ 6 0
17 eFEDS J093302.7-010145 ClG 09 33 03.4 -01 01 49           ~ 8 0
18 eFEDS J093403.5-001422 ClG 09 34 03.6 -00 14 23           ~ 5 0
19 eFEDS J093431.3-002309 ClG 09 34 31.1 -00 23 07           ~ 11 0
20 eFEDS J093513.0+004757 ClG 09 35 13.11534902 +00 47 57.9265794           ~ 7 0
21 eFEDS J093546.4-000115 ClG 09 35 46.4 -00 01 15           ~ 7 0

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