The eROSITA Final Equatorial-Depth Survey (eFEDS) Catalog of galaxy clusters and groups

被引:95
作者
Liu, A. [1 ]
Bulbul, E. [1 ]
Ghirardini, V [1 ]
Liu, T. [1 ]
Klein, M. [2 ]
Clerc, N. [3 ]
Oezsoy, Y. [1 ]
Ramos-Ceja, M. E. [1 ]
Pacaud, F. [4 ]
Comparat, J. [1 ]
Okabe, N. [5 ,6 ,7 ]
Bahar, Y. E. [1 ]
Biffi, V [2 ,8 ,9 ]
Brunner, H. [1 ]
Brueggen, M. [10 ]
Buchner, J. [1 ]
Chitham, J. Ider [1 ]
Chiu, I [11 ,12 ,13 ,14 ,15 ]
Dolag, K. [2 ]
Gatuzz, E. [1 ]
Gonzalez, J. [1 ]
Hoang, D. N. [10 ]
Lamer, G. [16 ]
Merloni, A. [1 ]
Nandra, K. [1 ]
Oguri, M. [17 ,18 ,19 ]
Ota, N. [4 ,20 ]
Predehl, P. [1 ]
Reiprich, T. H. [4 ]
Salvato, M. [1 ]
Schrabback, T. [4 ]
Sanders, J. S. [1 ]
Seppi, R. [1 ]
Thibaud, Q. [3 ]
机构
[1] Max Planck Inst Extraterr Phys, Giessenbach Str 1, D-85748 Garching, Germany
[2] Ludwig Maximilians Univ Munchen, Fak Phys, Univ Sternwarte Muenchen, Scheinerstr 1, D-81679 Munich, Germany
[3] Univ Toulouse, UPS, CNRS, CNES,IRAP, Toulouse, France
[4] Univ Bonn, Argelander Inst Astron AIfA, Hugel 71, D-53121 Bonn, Germany
[5] Hiroshima Univ, Grad Sch Adv Sci & Engn, Phys Program, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 7398526, Japan
[6] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 7398526, Japan
[7] Hiroshima Univ, Core Res Energet Universe, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 7398526, Japan
[8] INAF Osservatorio Astron Trieste, Via Tiepolo 11, I-34143 Trieste, Italy
[9] IFPU Inst Fundamental Phys Universe, Via Beirut 2, I-34014 Trieste, Italy
[10] Univ Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany
[11] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China
[12] Shanghai Jiao Tong Univ, Key Lab Particle Phys Astrophys & Cosmol, Minist Educ, Shanghai 200240, Peoples R China
[13] Shanghai Jiao Tong Univ, Sch Phys & Astron, Dept Astron, Shanghai 200240, Peoples R China
[14] Shanghai Jiao Tong Univ, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China
[15] Acad Sinica Inst Astron & Astrophys ASIAA, 11F NTU Astron Math Bldg,1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan
[16] Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany
[17] Univ Tokyo, Res Ctr Early Universe, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
[18] Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
[19] Univ Tokyo, Kavli Inst Phys & Math Universe Kavli IPMU, WPI, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778582, Japan
[20] Nara Womens Univ, Dept Phys, Kitauoyanishi Machi, Nara 6308506, Japan
基金
欧洲研究理事会; 日本学术振兴会;
关键词
surveys; galaxies: clusters: general; galaxies: clusters: intracluster medium; X-rays: galaxies: clusters; WIDE-FIELD SURVEY; X-RAY-PROPERTIES; LARGE-SCALE STRUCTURE; ALL-SKY SURVEY; COSMOS FIELD; COSMOLOGICAL ANALYSIS; LUMINOSITY FUNCTION; SAMPLE; MASS; EVOLUTION;
D O I
10.1051/0004-6361/202141120
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Aims. The eROSITA Final Equatorial-Depth Survey has been carried out during the performance verification phase of the Spectrum-Roentgen-Gamma/eROSITA telescope and was completed in November 2019. This survey is designed to provide the first eROSITA-selected sample of clusters and groups and to test the predictions for the all-sky survey in the context of cosmological studies with clusters of galaxies. Methods. In the area of similar to 140 square degrees covered by eFEDS, 542 candidate clusters and groups of galaxies were detected as extended X-ray sources with the eSASS source detection algorithm. We performed imaging and spectral analysis of the 542 cluster candidates with eROSITA X-ray data and studied the properties of the sample. Results. We provide the catalog of candidate galaxy clusters and groups detected by eROSITA in the eFEDS field down to a flux of similar to 10(-14) erg s(-1) cm(-2) in the soft band (0.5-2 keV) within 1'. The clusters are distributed in the redshift range z = [0.01, 1.3] with a median redshift z(median )= 0.35. With eROSITA X-ray data, we measured the temperature of the intracluster medium within two radii, 300 kpc and 500 kpc, and constrained the temperature with >2 sigma confidence level for similar to 1/5 (102 out of 542) of the sample. The average temperature of these clusters is similar to 2 keV. Radial profiles of flux, luminosity, electron density, and gas mass were measured from the precise modeling of the imaging data. The selection function, the purity, and the completeness of the catalog are examined and discussed in detail. The contamination fraction is similar to 1/5 in this sample and is dominated by misidentified point sources. The X-ray luminosity function of the clusters agrees well with the results obtained from other recent X-ray surveys. We also find 19 supercluster candidates in this field, most of which are located at redshifts between 0.1 and 0.5, including one cluster at z similar to 0.36 that was presented previously. Conclusions. The eFEDS cluster and group catalog at the final eRASS equatorial depth provides a benchmark proof of concept for the eROSITA All-Sky Survey extended source detection and characterization. We confirm the excellent performance of eROSITA for cluster science and expect no significant deviations from our pre-launch expectations for the final all-sky survey.
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页数:25
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