Analysis of new WHT, VLT, and SOAR observations: Confirming new galaxy clusters from Planck & Calibrating the masses of high-redshift SPT clusters via weak gravitational lensing for cosmological investigations

• Applicant: Professor Dr. Tim Schrabback
• Subject Area: Astrophysics and Astronomy
• Term: from 2019 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 415537506

• Final Report Year: 2024

Final Report Abstract

The project had the overall scientic objective to improve cosmological measurements with the help of galaxy cluster samples, primarily by analysing data sets that improve the calibration of cluster mass proxies using weak gravitational lensing. As one component of the project ground-based observations including deep VLT imaging were analysed to achieve an improved selection of background galaxies for the weak gravitational lensing analysis of distant galaxy clusters from the South Pole Telescope. Within the project we also contributed to an analysis of simulated data with the goal to reduce systematic uncertainties related to weak lensing mass modelling. Important ndings of this work include constraints on the dependence of mass modelling biases on assumptions regarding cluster concentrations, a demonstration how mass modelling biases can be quantied and corrected for independent of the level of shape noise, constraints on the actual distribution of mass modelling biases, and a demonstration that the standard assumption of isotropic miscentring in weak lensing shear proles can lead to a systematic overestimation of cluster masses. By participating in the analysis of weak lensing data from the VST Kilo Degree Survey we additionally contributed to the weak lensing mass calibration of the eROSITA survey. The achieved weak lensing constraints have been included in the latest cosmological analyses of the South Pole Telescope and eROSITA galaxy cluster samples under the lead of our collaboration partners, yielding improved constraints on the cosmological model.

Publications

• Constraining the masses of high-redshift clusters with weak lensing: Revised shape calibration testing for the impact of stronger shears and increased blending. Astronomy & Astrophysics, 640, A117.
  Hernández-Martín, B.; Schrabback, T.; Hoekstra, H.; Martinet, N.; Hlavacek-Larrondo, J.; Bleem, L. E.; Gladders, M. D.; Stalder, B.; Stark, A. A. & Bayliss, M.
  
• The SPTpol Extended Cluster Survey. The Astrophysical Journal Supplement Series, 247(1), 25.
  Bleem, L. E.; Bocquet, S.; Stalder, B.; Gladders, M. D.; Ade, P. A. R.; Allen, S. W.; Anderson, A. J.; Annis, J.; Ashby, M. L. N.; Austermann, J. E.; Avila, S.; Avva, J. S.; Bayliss, M.; Beall, J. A.; Bechtol, K.; Bender, A. N.; Benson, B. A.; Bertin, E.; Bianchini, F. ... & Zhang, Y.
  
• Mass calibration of distant SPT galaxy clusters through expanded weak-lensing follow-up observations with HST, VLT, & Gemini-South. Monthly Notices of the Royal Astronomical Society, 505(3), 3923-3943.
  Schrabback, T.; Bocquet, S.; Sommer, M.; Zohren, H.; van den Busch, J. L.; Hernández-Martín, B.; Hoekstra, H.; Raihan, S. F.; Schirmer, M.; Applegate, D.; Bayliss, M.; Benson, B. A.; Bleem, L. E.; Dietrich, J. P.; Floyd, B.; Hilbert, S.; Hlavacek-Larrondo, J.; McDonald, M.; Saro, A. ... & Weissgerber, N.
  
• Weak lensing mass modeling bias and the impact of miscentring. Monthly Notices of the Royal Astronomical Society, 509(1), 1127–1146.
  Sommer, Martin W; Schrabback, Tim; Applegate, Douglas E; Hilbert, Stefan; Ansarinejad, Behzad; Floyd, Benjamin & Grandis, Sebastian
  
• Combining Planck and SPT Cluster Catalogs: Cosmological Analysis and Impact on the Planck Scaling Relation Calibration. The Astrophysical Journal, 934(2), 129.
  Salvati, L.; Saro, A.; Bocquet, S.; Costanzi, M.; Ansarinejad, B.; Benson, B. A.; Bleem, L. E.; Calzadilla, M. S.; Carlstrom, J. E.; Chang, C. L.; Chown, R.; Crites, A. T.; Haan, T. de; Dobbs, M. A.; Everett, W. B.; Floyd, B.; Grandis, S.; George, E. M.; Halverson, N. W. ... & Williamson, R.
  
• Extending empirical constraints on the SZ–mass scaling relation to higher redshifts via HST weak lensing measurements of nine clusters from the SPT-SZ survey at z ≳ 1. Astronomy & Astrophysics, 668, A18.
  Zohren, Hannah; Schrabback, Tim; Bocquet, Sebastian; Sommer, Martin; Raihan, Fatimah; Hernández-Martín, Beatriz; Marggraf, Ole; Ansarinejad, Behzad; Bayliss, Matthew B.; Bleem, Lindsey E.; Erben, Thomas; Hoekstra, Henk; Floyd, Benjamin; Gladders, Michael D.; Kleinebreil, Florian; McDonald, Michael A.; Schirmer, Mischa; Scognamiglio, Diana; Sharon, Keren & Wright, Angus H.
  
• Euclid: Improving the efficiency of weak lensing shear bias calibration. Astronomy & Astrophysics, 683, A240.
  Jansen, H.; Tewes, M.; Schrabback, T.; Aghanim, N.; Amara, A.; Andreon, S.; Auricchio, N.; Baldi, M.; Branchini, E.; Brescia, M.; Brinchmann, J.; Camera, S.; Capobianco, V.; Carbone, C.; Cardone, V. F.; Carretero, J.; Casas, S.; Castellano, M.; Cavuoti, S. ... & Scottez, V.
  
• Galaxy Clusters Discovered via the Thermal Sunyaev-Zel’dovich Effect in the 500-square-degree SPTpol Survey. The Open Journal of Astrophysics, 7.
  Bleem, L. E.; Klein, M.; Abbot, T. M. C.; Ade, P. A. R.; Aguena, M.; Alves, O.; Anderson, A.J.; Andrade-Oliveira, F.; Ansarinejad, B.; Archipley, M.; Ashby, M. L. N.; Austermann, J. E.; Bacon, D.; Beall, J. A.; Bender, A. N.; Benson, B. A.; Bianchini, F.; Bocquet, S.; Brooks, D. ... & Zhang, Y.
  
• SPT clusters with DES and HST weak lensing. I. Cluster lensing and Bayesian population modeling of multiwavelength cluster datasets. Physical Review D, 110(8).
  Bocquet, S.; Grandis, S.; Bleem, L. E.; Klein, M.; Mohr, J. J.; Aguena, M.; Alarcon, A.; Allam, S.; Allen, S. W.; Alves, O.; Amon, A.; Ansarinejad, B.; Bacon, D.; Bayliss, M.; Bechtol, K.; Becker, M. R.; Benson, B. A.; Bernstein, G. M. ... & Brodwin, M.
  
• SPT clusters with DES and HST weak lensing. II. Cosmological constraints from the abundance of massive halos. Physical Review D, 110(8).
  Bocquet, S.; Grandis, S.; Bleem, L. E.; Klein, M.; Mohr, J. J.; Schrabback, T.; Abbott, T. M. C.; Ade, P. A. R.; Aguena, M.; Alarcon, A.; Allam, S.; Allen, S. W.; Alves, O.; Amon, A.; Anderson, A. J.; Annis, J.; Ansarinejad, B.; Austermann, J. E. ... & Avila, S.
  
• The SRG/eROSITA All-Sky Survey. Astronomy & Astrophysics, 685, A106.
  Bulbul, E.; Liu, A.; Kluge, M.; Zhang, X.; Sanders, J. S.; Bahar, Y. E.; Ghirardini, V.; Artis, E.; Seppi, R.; Garrel, C.; Ramos-Ceja, M. E.; Comparat, J.; Balzer, F.; Böckmann, K.; Brüggen, M.; Clerc, N.; Dennerl, K.; Dolag, K.; Freyberg, M. ... & Zelmer, S.
  
• The SRG/eROSITA All-Sky Survey. Astronomy & Astrophysics, 687, A178.
  Grandis, S.; Ghirardini, V.; Bocquet, S.; Garrel, C.; Mohr, J. J.; Liu, A.; Kluge, M.; Kimmig, L.; Reiprich, T. H.; Alarcon, A.; Amon, A.; Artis, E.; Bahar, Y. E.; Balzer, F.; Bechtol, K.; Becker, M. R.; Bernstein, G.; Bulbul, E.; Campos, A. ... & Weller, J.
  
• The SRG/eROSITA All-Sky Survey. Astronomy & Astrophysics, 688, A210.
  Kluge, M.; Comparat, J.; Liu, A.; Balzer, F.; Bulbul, E.; Ider, Chitham J.; Ghirardini, V.; Garrel, C.; Bahar, Y. E.; Artis, E.; Bender, R.; Clerc, N.; Dwelly, T.; Fabricius, M. H.; Grandis, S.; Hernández-Lang, D.; Hill, G. J.; Joshi, J.; Lamer, G. ... & Zhang, X.
  
• The SRG/eROSITA all-sky survey. Astronomy & Astrophysics, 689, A298.
  Ghirardini, V.; Bulbul, E.; Artis, E.; Clerc, N.; Garrel, C.; Grandis, S.; Kluge, M.; Liu, A.; Bahar, Y. E.; Balzer, F.; Chiu, I.; Comparat, J.; Gruen, D.; Kleinebreil, F.; Krippendorf, S.; Merloni, A.; Nandra, K.; Okabe, N.; Pacaud, F. ... & Stewart, I.
  
• The SRG/eROSITA All-Sky Survey. Astronomy & Astrophysics, 691, A301.
  Artis, E.; Ghirardini, V.; Bulbul, E.; Grandis, S.; Garrel, C.; Clerc, N.; Seppi, R.; Comparat, J.; Cataneo, M.; Bahar, Y. E.; Balzer, F.; Chiu, I.; Gruen, D.; Kleinebreil, F.; Kluge, M.; Krippendorf, S.; Li, X.; Liu, A.; Merloni, A. ... & Zhang, X.
  
• Weak lensing mass bias and the alignment of centre proxies. Monthly Notices of the Royal Astronomical Society, 532(3), 3359-3374.
  Sommer, Martin W.; Schrabback, Tim; Ragagnin, Antonio & Rockenfeller, Robert
  
• Euclid: Early Release Observations – A preview of the Euclid era through a galaxy cluster magnifying lens. Astronomy & Astrophysics, 697, A15.
  Atek, H.; Gavazzi, R.; Weaver, J. R.; Diego, J. M.; Schrabback, T.; Hatch, N. A.; Aghanim, N.; Dole, H.; Hartley, W. G.; Taamoli, S.; Congedo, G.; Jimenez-Teja, Y.; Cuillandre, J.-C.; Bañados, E.; Belladitta, S.; Bowler, R. A. A.; Franco, M.; Jauzac, M.; Mahler, G. ... & Scott, D.
  
• The SRG/eROSITA All-Sky Survey. Astronomy & Astrophysics, 695, A216.
  Kleinebreil, F.; Grandis, S.; Schrabback, T.; Ghirardini, V.; Chiu, I.; Liu, A.; Kluge, M.; Reiprich, T. H.; Artis, E.; Bahar, Y. E.; Balzer, F.; Bulbul, E.; Clerc, N.; Comparat, J.; Garrel, C.; Gruen, D.; Li, X.; Miyatake, H.; Miyazaki, S. ... & Zhang, X.