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  A joint SZ–X-ray–optical analysis of the dynamical state of 288 massive galaxy clusters

Zenteno, A., Hernández-Lang, D., Klein, M., Cervantes, C. V., Hollowood, D. L., Bhargava, S., et al. (2020). A joint SZ–X-ray–optical analysis of the dynamical state of 288 massive galaxy clusters. Monthly Notices of the Royal Astronomical Society, 495(1), 705-725. doi:10.1093/mnras/staa1157.

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Zenteno, A., Author
Hernández-Lang, D., Author
Klein, M.1, Author           
Cervantes, C. Vergara, Author
Hollowood, D. L., Author
Bhargava, S., Author
Palmese, A., Author
Strazzullo, V., Author
Romer, A. K., Author
Mohr, J. J.2, Author           
Jeltema, T., Author
Saro, A., Author
Lidman, C., Author
Gruen, D., Author
Ojeda, V., Author
Katzenberger, A., Author
Aguena, M., Author
Allam, S., Author
Avila, S., Author
Bayliss, M., Author
Bertin, E., AuthorBrooks, D., AuthorBuckley-Geer, E., AuthorBurke, D. L., AuthorCapasso, R., AuthorRosell, A. Carnero, AuthorKind, M. Carrasco, AuthorCarretero, J., AuthorCastander, F. J., AuthorCostanzi, M., Authorda Costa, L. N., AuthorVicente, J. De, AuthorDesai, S., AuthorDiehl, H. T., AuthorDoel, P., AuthorEifler, T. F., AuthorEvrard, A. E., AuthorFlaugher, B., AuthorFloyd, B., AuthorFosalba, P., AuthorFrieman, J., AuthorGarcía-Bellido, J., AuthorGerdes, D. W., AuthorGonzalez, J. R., AuthorGruendl, R. A., AuthorGschwend, J., AuthorGutierrez, G., AuthorHartley, W. G., AuthorHinton, S. R., AuthorHonscheid, K., AuthorJames, D. J., AuthorKuehn, K., AuthorLahav, O., AuthorLima, M., AuthorMcDonald, M., AuthorMaia, M. A. G., AuthorMarch, M., AuthorMelchior, P., AuthorMenanteau, F., AuthorMiquel, R., AuthorOgando, R. L. C., AuthorPaz-Chinchón, F., AuthorPlazas, A. A., AuthorRoodman, A., AuthorRykoff, E. S., AuthorSanchez, E., AuthorScarpine, V., AuthorSchubnell, M., AuthorSerrano, S., AuthorSevilla-Noarbe, I., AuthorSmith, M., AuthorSoares-Santos, M., AuthorSuchyta, E., AuthorSwanson, M. E. C., AuthorTarle, G., AuthorThomas, D., AuthorVarga, T. N., AuthorWalker, A. R., AuthorWilkinson, R. D., Author more..
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              
2Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              


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 Abstract: We use imaging from the first three years of the Dark Energy Survey to characterize the dynamical state of 288 galaxy clusters at 0.1 ≲ z ≲ 0.9 detected in the South Pole Telescope (SPT) Sunyaev–Zeldovich (SZ) effect survey (SPT-SZ). We examine spatial offsets between the position of the brightest cluster galaxy (BCG) and the centre of the gas distribution as traced by the SPT-SZ centroid and by the X-ray centroid/peak position from Chandra and XMM data. We show that the radial distribution of offsets provides no evidence that SPT SZ-selected cluster samples include a higher fraction of mergers than X-ray-selected cluster samples. We use the offsets to classify the dynamical state of the clusters, selecting the 43 most disturbed clusters, with half of those at z ≳ 0.5, a region seldom explored previously. We find that Schechter function fits to the galaxy population in disturbed clusters and relaxed clusters differ at z > 0.55 but not at lower redshifts. Disturbed clusters at z > 0.55 have steeper faint-end slopes and brighter characteristic magnitudes. Within the same redshift range, we find that the BCGs in relaxed clusters tend to be brighter than the BCGs in disturbed samples, while in agreement in the lower redshift bin. Possible explanations includes a higher merger rate, and a more efficient dynamical friction at high redshift. The red-sequence population is less affected by the cluster dynamical state than the general galaxy population.


 Dates: 2020-05-04
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/staa1157
Other: LOCALID: 3250461
 Degree: -



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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 495 (1) Sequence Number: - Start / End Page: 705 - 725 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150