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

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Title: Planck intermediate results XL. The Sunyaev-Zeldovich signal from the Virgo cluster
Authors: Ade, PAR
Aghanim, N
Arnaud, M
Ashdown, M
Aumont, J
Baccigalupi, C
Banday, AJ
Barreiro, RB
Bartolo, N
Battaner, E
Benabed, K
Benoit-Levy, A
Bernard, J-P
Bersanelli, M
Bielewicz, P
Bonaldi, A
Bonavera, L
Bond, JR
Borrill, J
Bouchet, FR
Burigana, C
Butler, RC
Calabrese, E
Cardoso, J-F
Catalano, A
Chamballu, A
Chiang, HC
Christensen, PR
Churazov, E
Clements, DL
Colombo, LPL
Combet, C
Comis, B
Couchot, F
Coulais, A
Crill, BP
Curto, A
Cuttaia, F
Danese, L
Davies, RD
Davis, RJ
De Bernardis, P
De Rosa, A
De Zotti, G
Delabrouille, J
Dickinson, C
Diego, JM
Dolag, K
Dole, H
Donzelli, S
Dore, O
Douspis, M
Ducout, A
Dupac, X
Efstathiou, G
Elsner, F
Ensslin, TA
Eriksen, HK
Finelli, F
Forni, O
Frailis, M
Fraisse, AA
Franceschi, E
Galeotta, S
Galli, S
Gangal, K
Giard, M
Giraud-Heraud, Y
Gjerlow, E
Gonzalez-Nuevo, J
Gorski, KM
Gregorio, A
Gruppuso, A
Gudmundsson, JE
Hansen, FK
Harrison, DL
Helou, G
Hernandez-Monteagudo, C
Herranz, D
Hildebrandt, SR
Hivon, E
Hobson, M
Hornstrup, A
Hovest, W
Huffenberger, KM
Hurier, G
Jaffe, AH
Jaffe, TR
Jones, WC
Keihanen, E
Keskitalo, R
Kisner, TS
Kneissl, R
Knoche, J
Kunz, M
Kurki-Suonio, H
Lagache, G
Lamarre, J-M
Lasenby, A
Lattanzi, M
Lawrence, CR
Leonardi, R
Levrier, F
Liguori, M
Lilje, PB
Linden-Vornle, M
Lopez-Caniego, M
Lubin, PM
Macias-Perez, JF
Maffei, B
Maggio, G
Maino, D
Mandolesi, N
Mangilli, A
Marcos-Caballero, A
Maris, M
Martin, PG
Martinez-Gonzalez, E
Masi, S
Matarrese, S
Mazzotta, P
Meinhold, PR
Melchiorri, A
Mennella, A
Migliaccio, M
Mitra, S
Miville-Deschenes, M-A
Moneti, A
Montier, L
Morgante, G
Mortlock, D
Munshi, D
Murphy, JA
Naselsky, P
Nati, F
Natoli, P
Noviello, F
Novikov, D
Novikov, I
Oppermann, N
Oxborrow, CA
Pagano, L
Pajot, F
Paoletti, D
Pasian, F
Pearson, TJ
Perdereau, O
Perotto, L
Pettorino, V
Piacentini, F
Piat, M
Pierpaoli, E
Plaszczynski, S
Pointecouteau, E
Polenta, G
Ponthieu, N
Pratt, GW
Prunet, S
Puget, J-L
Rachen, JP
Reinecke, M
Remazeilles, M
Renault, C
Renzi, A
Ristorcelli, I
Rocha, G
Rosset, C
Rossetti, M
Roudier, G
Rubino-Martin, JA
Rusholme, B
Sandri, M
Santos, D
Savelainen, M
Savini, G
Schaefer, BM
Scott, D
Soler, JD
Stolyarov, V
Stompor, R
Sudiwala, R
Sunyaev, R
Sutton, D
Suur-Uski, A-S
Sygnet, J-F
Tauber, JA
Terenzi, L
Toffolatti, L
Tomasi, M
Tristram, M
Tucci, M
Umana, G
Valenziano, L
Valiviita, J
Van Tent, B
Vielva, P
Villa, F
Wade, LA
Wandelt, BD
Wehus, IK
Weller, J
Yvon, D
Zacchei, A
Zonca, A
Item Type: Journal Article
Abstract: 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.
Issue Date: 12-Dec-2016
Date of Acceptance: 27-Sep-2016
URI: http://hdl.handle.net/10044/1/60006
DOI: https://dx.doi.org/10.1051/0004-6361/201527743
ISSN: 0004-6361
Publisher: EDP Sciences
Journal / Book Title: Astronomy and Astrophysics
Volume: 596
Copyright Statement: © ESO 2016
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council [2006-2012]
Funder's Grant Number: ST/F01239X/1
ST/H001239/1
ST/J001368/1
ST/K001051/1
ST/K004131/1
ST/N001206/1
ST/K001051/1
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
ISM: general
galaxies: clusters: individual: Virgo
galaxies: clusters: intracluster medium
cosmic background radiation
large-scale structure of Universe
HUBBLE-SPACE-TELESCOPE
HOT INTERGALACTIC MEDIUM
CENTIMETER LINE WIDTHS
RAY GALAXY CLUSTERS
X-RAY
VIRIAL RADIUS
3-DIMENSIONAL STRUCTURE
COMA CLUSTER
GAS
DISTANCE
astro-ph.CO
0201 Astronomical And Space Sciences
Publication Status: Published
Article Number: ARTN A101
Appears in Collections:Physics
Astrophysics
Faculty of Natural Sciences



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