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Planck intermediate results: XL. the Sunyaev-Zeldovich signal from the Virgo cluster

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dc.contributor.author Ade P.
dc.contributor.author Aghanim N.
dc.contributor.author Arnaud M.
dc.contributor.author Ashdown M.
dc.contributor.author Aumont J.
dc.contributor.author Baccigalupi C.
dc.contributor.author Banday A.
dc.contributor.author Barreiro R.
dc.contributor.author Bartolo N.
dc.contributor.author Battaner E.
dc.contributor.author Benabed K.
dc.contributor.author Benoit-Lévy A.
dc.contributor.author Bernard J.
dc.contributor.author Bersanelli M.
dc.contributor.author Bielewicz P.
dc.contributor.author Bonaldi A.
dc.contributor.author Bonavera L.
dc.contributor.author Bond J.
dc.contributor.author Borrill J.
dc.contributor.author Bouchet F.
dc.contributor.author Burigana C.
dc.contributor.author Butler R.
dc.contributor.author Calabrese E.
dc.contributor.author Cardoso J.
dc.contributor.author Catalano A.
dc.contributor.author Chamballu A.
dc.contributor.author Chiang H.
dc.contributor.author Christensen P.
dc.contributor.author Churazov E.
dc.contributor.author Clements D.
dc.contributor.author Colombo L.
dc.contributor.author Combet C.
dc.contributor.author Comis B.
dc.contributor.author Couchot F.
dc.contributor.author Coulais A.
dc.contributor.author Crill B.
dc.contributor.author Curto A.
dc.contributor.author Cuttaia F.
dc.contributor.author Danese L.
dc.contributor.author Davies R.
dc.contributor.author Davis R.
dc.contributor.author De Bernardis P.
dc.contributor.author De Rosa A.
dc.contributor.author De Zotti G.
dc.contributor.author Delabrouille J.
dc.contributor.author Dickinson C.
dc.contributor.author Diego J.
dc.contributor.author Dolag K.
dc.contributor.author Dole H.
dc.contributor.author Donzelli S.
dc.contributor.author Doré O.
dc.contributor.author Douspis M.
dc.contributor.author Ducout A.
dc.contributor.author Dupac X.
dc.contributor.author Efstathiou G.
dc.contributor.author Elsner F.
dc.contributor.author Enßlin T.
dc.contributor.author Eriksen H.
dc.contributor.author Finelli F.
dc.contributor.author Forni O.
dc.contributor.author Frailis M.
dc.contributor.author Fraisse A.
dc.contributor.author Franceschi E.
dc.contributor.author Galeotta S.
dc.date.accessioned 2018-09-19T20:05:52Z
dc.date.available 2018-09-19T20:05:52Z
dc.date.issued 2016
dc.identifier.issn 0004-6361
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/142558
dc.description.abstract © ESO, 2016.The Virgo cluster is the largest Sunyaev-Zeldovich (SZ) source in the sky, both in terms of angular size and total integrated flux. Planck's wide angular scale and frequency coverage, together with its high sensitivity, enable a detailed study of this big object through the SZ effect. Virgo is well resolved by Planck, showing an elongated structure that correlates well with the morphology observed from X-rays, but extends beyond the observed X-ray signal. We find good agreement between the SZ signal (or Compton parameter, yc) observed by Planck and the expected signal inferred from X-ray observations and simple analytical models. Owing to its proximity to us, the gas beyond the virial radius in Virgo can be studied with unprecedented sensitivity by integrating the SZ signal over tens of square degrees. We study the signal in the outskirts of Virgo and compare it with analytical models and a constrained simulation of the environment of Virgo. Planck data suggest that significant amounts of low-density plasma surround Virgo, out to twice the virial radius. We find the SZ signal in the outskirts of Virgo to be consistent with a simple model that extrapolates the inferred pressure at lower radii, while assuming that the temperature stays in the keV range beyond the virial radius. The observed signal is also consistent with simulations and points to a shallow pressure profile in the outskirts of the cluster. This reservoir of gas at large radii can be linked with the hottest phase of the elusivewarm/hot intergalactic medium. Taking the lack of symmetry of Virgo into account, we find that a prolate model is favoured by the combination of SZ and X-ray data, in agreement with predictions. Finally, based on the combination of the same SZ and X-ray data, we constrain the total amount of gas in Virgo. Under the hypothesis that the abundance of baryons in Virgo is representative of the cosmic average, we also infer a distance for Virgo of approximately 18 Mpc, in good agreement with previous estimates.
dc.relation.ispartofseries Astronomy and Astrophysics
dc.subject Cosmic background radiation
dc.subject Galaxies: clusters: individual: Virgo
dc.subject Galaxies: clusters: intracluster medium
dc.subject ISM: general
dc.subject Large-scale structure of Universe
dc.title Planck intermediate results: XL. the Sunyaev-Zeldovich signal from the Virgo cluster
dc.type Article
dc.relation.ispartofseries-volume 596
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS00046361-2016-596-SID85006810259


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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