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  Measurement of the splashback feature around SZ-selected Galaxy clusters with DES, SPT, and ACT

Shin, T., Adhikari, S., Baxter, E. J., Chang, C., Jain, B., Battaglia, N., et al. (2019). Measurement of the splashback feature around SZ-selected Galaxy clusters with DES, SPT, and ACT. Monthly Notices of the Royal Astronomical Society, 487(2), 2900-2918. doi:10.1093/mnras/stz1434.

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Shin, T., Author
Adhikari, S., Author
Baxter, E. J., Author
Chang, C., Author
Jain, B., Author
Battaglia, N., Author
Bleem, L., Author
Bocquet, S., Author
DeRose, J., Author
Gruen, D., Author
Hilton, M., Author
Kravtsov, A., Author
McClintock, T., Author
Rozo, E., Author
Rykoff, E. S., Author
Varga, T. N.1, Author              
Wechsler, R. H., Author
Wu, H., Author
Zhang, Z., Author
Aiola, S., Author
Allam, S., AuthorBechtol, K., AuthorBenson, B. A., AuthorBertin, E., AuthorBond, J. R., AuthorBrodwin, M., AuthorBrooks, D., AuthorBuckley-Geer, E., AuthorBurke, D. L., AuthorCarlstrom, J. E., AuthorCarnero Rosell, A. , AuthorCarrasco Kind, M. , AuthorCarretero, J., AuthorCastander, F. J., AuthorChoi, S. K., AuthorCunha, C. E., AuthorCrawford, T. M., Authorda Costa, L. N., AuthorVicente, J. De, AuthorDesai, S., AuthorDevlin, M. J., AuthorDietrich, J. P., AuthorDoel, P., AuthorDunkley, J., AuthorEifler, T. F., AuthorEvrard, A. E., AuthorFlaugher, B., AuthorFosalba, P., AuthorGallardo, P. A., AuthorGarcía-Bellido, J., AuthorGaztanaga, E., AuthorGerdes, D. W., AuthorGralla, M., AuthorGruendl, R. A., AuthorGschwend, J., AuthorGupta, N., AuthorGutierrez, G., AuthorHartley, W. G., AuthorHill, J. C., AuthorHo, S. P., AuthorHollowood, D. L., AuthorHonscheid, K., AuthorHoyle, B.1, Author              Huffenberger, K., AuthorHughes, J. P., AuthorJames, D. J., AuthorJeltema, T., AuthorKim, A. G., AuthorKrause, E., AuthorKuehn, K., AuthorLahav, O., AuthorLima, M., AuthorMadhavacheril, M. S., AuthorMaia, M. A. G., AuthorMarshall, J. L., AuthorMaurin, L., AuthorMcMahon, J., AuthorMenanteau, F., AuthorMiller, C. J., AuthorMiquel, R., AuthorMohr, J. J.1, Author              Naess, S., AuthorNati, F., AuthorNewburgh, L., AuthorNiemack, M. D., AuthorOgando, R. L. C., AuthorPage, L. A., AuthorPartridge, B., AuthorPatil, S., AuthorPlazas, A. A., AuthorRapetti, D., AuthorReichardt, C. L., AuthorRomer, A. K., AuthorSanchez, E., AuthorScarpine, V., AuthorSchindler, R., AuthorSerrano, S., AuthorSmith, M., AuthorSmith, R. C., AuthorSoares-Santos, M., AuthorSobreira, F., AuthorStaggs, S. T., AuthorStark, A., AuthorStein, G., AuthorSuchyta, E., AuthorSwanson, M. E. C., AuthorTarle, G., AuthorThomas, D., Authorvan Engelen, A., AuthorWollack, E. J., AuthorXu, Z., Author more..
Affiliations:
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

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 Abstract: We present a detection of the splashback feature around galaxy clusters selected using the Sunyaev–Zel’dovich (SZ) signal. Recent measurements of the splashback feature around optically selected galaxy clusters have found that the splashback radius, rsp, is smaller than predicted by N-body simulations. A possible explanation for this discrepancy is that rsp inferred from the observed radial distribution of galaxies is affected by selection effects related to the optical cluster-finding algorithms. We test this possibility by measuring the splashback feature in clusters selected via the SZ effect in data from the South Pole Telescope SZ survey and the Atacama Cosmology Telescope Polarimeter survey. The measurement is accomplished by correlating these cluster samples with galaxies detected in the Dark Energy Survey Year 3 data. The SZ observable used to select clusters in this analysis is expected to have a tighter correlation with halo mass and to be more immune to projection effects and aperture-induced biases, potentially ameliorating causes of systematic error for optically selected clusters. We find that the measured rsp for SZ-selected clusters is consistent with the expectations from simulations, although the small number of SZ-selected clusters makes a precise comparison difficult. In agreement with previous work, when using optically selected redMaPPer clusters with similar mass and redshift distributions, rsp is ∼2σ smaller than in the simulations. These results motivate detailed investigations of selection biases in optically selected cluster catalogues and exploration of the splashback feature around larger samples of SZ-selected clusters. Additionally, we investigate trends in the galaxy profile and splashback feature as a function of galaxy colour, finding that blue galaxies have profiles close to a power law with no discernible splashback feature, which is consistent with them being on their first infall into the cluster.

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 Dates: 2019-05-24
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stz1434
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 487 (2) Sequence Number: - Start / End Page: 2900 - 2918 Identifier: ISSN: 1365-2966
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150