Planck intermediate results XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect

P. A. R. Ade; N. Aghanim; M. Arnaud; M. Ashdown; E. Aubourg; J. Aumont; C. Baccigalupi; A. J. Banday; R. B. Barreiro; N. Bartolo; E. Battaner; K. Benabed; A. Benoit-Levy; M. Bersanelli; P. Bielewicz; J. J. Bock; A. Bonaldi; L. Bonavera; J. R. Bond; J. Borrill; F. R. Bouchet; C. Burigana; E. Calabrese; J. -F. Cardoso; A. Catalano; A. Chamballu; H. C. Chiang; P. R. Christensen; D. L. Clements; L. P. L. Colombo; C. Combet; B. P. Crill; A. Curto; F. Cuttaia; L. Danese; R. D. Davies; R. J. Davis; P. de Bernardis; Giulia De Zotti; J. Delabrouille; C. Dickinson; J. M. Diego; K. Dolag; S. Donzelli; O. Dore; M. Douspis; A. Ducout; X. Dupac; G. Efstathiou; F. Elsner; T. A. Ensslin; H. K. Eriksen; F. Finelli; O. Forni; M. Frailis; A. A. Fraisse; E. Franceschi; A. Frejsel; S. Galeotta; S. Galli; K. Ganga; R. T. Genova-Santos; M. Giard; E. Gjerlow; J. Gonzalez-Nuevo; K. M. Gorski; A. Gregorio; A. Gruppuso; F. K. Hansen; D. L. Harrison; S. Henrot-Versille; C. Hernandez-Monteagudo; D. Herranz; S. R. Hildebrandt; E. Hivon; M. Hobson; Allan Hornstrup; K. M. Huffenberger; G. Hurier; A. H. Jaffe; T. R. Jaffe; W. C. Jones; M. Juvela; E. Keihanen; R. Keskitalo; F. Kitaura; R. Kneissl; J. Knoche; M. Kunz; H. Kurki-Suonio; G. Lagache; J. -M. Lamarre; A. Lasenby; M. Lattanzi; C. R. Lawrence; R. Leonardi; J. Leon-Tavares; F. Levrier; M. Liguori; P. B. Lilje; Michael Linden-Vørnle; M. Lopez-Caniego; P. M. Lubin; Y. -Z. Ma; J. F. Macias-Perez; B. Maffei; D. Maino; D. S. Y. Mak; N. Mandolesi; A. Mangilli; M. Maris; P. G. Martin; E. Martinez-Gonzalez; S. Masi; S. Matarrese; P. McGehee; A. Melchiorri; A. Mennella; M. Migliaccio; M. -A. Miville-Deschenes; A. Moneti; L. Montier; G. Morgante; D. Mortlock; D. Munshi; J. A. Murphy; P. Naselsky; F. Nati; P. Natoli; F. Noviello; D. Novikov; I. Novikov; Carol Anne Oxborrow; L. Pagano; Fernand Pajot; D. Paoletti; O. Perdereau; L. Perotto; V. Pettorino; F. Piacentini; M. Piat; E. Pierpaoli; E. Pointecouteau; G. Polenta; N. Pontineu; G. W. Pratt; J. -L. Puget; S. Puisieux; J. P. Rachen; B. Racine; W. T. Reach; M. Reinecke; M. Remazeilles; C. Renault; A. Renzi; I. Ristorcelli; G. Rocha; C. Rosset; M. Rossetti; G. Roudier; J. A. Rubino-Martin; B. Rusholme; M. Sandri; D. Santos; M. Savelainen; G. Savini; D. Scott; L. D. Spencer; V. Stolyarov; R. Sudiwala; R. Sunyaev; D. Sutton; A. -S. Suur-Uski; J. -F. Sygnet; J. A. Tauber; L. Terenzi; L. Toffolatti; M. Tomasi; M. Tucci; L. Valenziano; J. Valiviita; B. Van Tent; P. Vielva; F. Villa; L. A. Wade; B. D. Wandelt; W. Wang; I. K. Wehus; D. Yvon; A. Zacchei; A. Zonca

doi:10.1051/0004-6361/201526328

Planck intermediate results XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect

P. A. R. Ade, N. Aghanim, M. Arnaud, M. Ashdown, E. Aubourg, J. Aumont, C. Baccigalupi, A. J. Banday, R. B. Barreiro, N. Bartolo, E. Battaner, K. Benabed, A. Benoit-Levy, M. Bersanelli, P. Bielewicz, J. J. Bock, A. Bonaldi, L. Bonavera, J. R. Bond, J. BorrillF. R. Bouchet, C. Burigana, E. Calabrese, J. -F. Cardoso, A. Catalano, A. Chamballu, H. C. Chiang, P. R. Christensen, D. L. Clements, L. P. L. Colombo, C. Combet, B. P. Crill, A. Curto, F. Cuttaia, L. Danese, R. D. Davies, R. J. Davis, P. de Bernardis, Giulia De Zotti, J. Delabrouille, C. Dickinson, J. M. Diego, K. Dolag, S. Donzelli, O. Dore, M. Douspis, A. Ducout, X. Dupac, G. Efstathiou, F. Elsner, T. A. Ensslin, H. K. Eriksen, F. Finelli, O. Forni, M. Frailis, A. A. Fraisse, E. Franceschi, A. Frejsel, S. Galeotta, S. Galli, K. Ganga, R. T. Genova-Santos, M. Giard, E. Gjerlow, J. Gonzalez-Nuevo, K. M. Gorski, A. Gregorio, A. Gruppuso, F. K. Hansen, D. L. Harrison, S. Henrot-Versille, C. Hernandez-Monteagudo, D. Herranz, S. R. Hildebrandt, E. Hivon, M. Hobson, Allan Hornstrup, K. M. Huffenberger, G. Hurier, A. H. Jaffe, T. R. Jaffe, W. C. Jones, M. Juvela, E. Keihanen, R. Keskitalo, F. Kitaura, R. Kneissl, J. Knoche, M. Kunz, H. Kurki-Suonio, G. Lagache, J. -M. Lamarre, A. Lasenby, M. Lattanzi, C. R. Lawrence, R. Leonardi, J. Leon-Tavares, F. Levrier, M. Liguori, P. B. Lilje, Michael Linden-Vørnle, M. Lopez-Caniego, P. M. Lubin, Y. -Z. Ma, J. F. Macias-Perez, B. Maffei, D. Maino, D. S. Y. Mak, N. Mandolesi, A. Mangilli, M. Maris, P. G. Martin, E. Martinez-Gonzalez, S. Masi, S. Matarrese, P. McGehee, A. Melchiorri, A. Mennella, M. Migliaccio, M. -A. Miville-Deschenes, A. Moneti, L. Montier, G. Morgante, D. Mortlock, D. Munshi, J. A. Murphy, P. Naselsky, F. Nati, P. Natoli, F. Noviello, D. Novikov, I. Novikov, Carol Anne Oxborrow, L. Pagano, Fernand Pajot, D. Paoletti, O. Perdereau, L. Perotto, V. Pettorino, F. Piacentini, M. Piat, E. Pierpaoli, E. Pointecouteau, G. Polenta, N. Pontineu, G. W. Pratt, J. -L. Puget, S. Puisieux, J. P. Rachen, B. Racine, W. T. Reach, M. Reinecke, M. Remazeilles, C. Renault, A. Renzi, I. Ristorcelli, G. Rocha, C. Rosset, M. Rossetti, G. Roudier, J. A. Rubino-Martin, B. Rusholme, M. Sandri, D. Santos, M. Savelainen, G. Savini, D. Scott, L. D. Spencer, V. Stolyarov, R. Sudiwala, R. Sunyaev, D. Sutton, A. -S. Suur-Uski, J. -F. Sygnet, J. A. Tauber, L. Terenzi, L. Toffolatti, M. Tomasi, M. Tucci, L. Valenziano, J. Valiviita, B. Van Tent, P. Vielva, F. Villa, L. A. Wade, B. D. Wandelt, W. Wang, I. K. Wehus, D. Yvon, A. Zacchei, A. Zonca

University of Copenhagen

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

By looking at the kinetic Sunyaev-Zeldovich effect (kSZ) in Planck nominal mission data, we present a significant detection of baryons participating in large-scale bulk flows around central galaxies (CGs) at redshift z approximate to 0.1. We estimate the pairwise momentum of the kSZ temperature fluctuations at the positions of the Central Galaxy Catalogue (CGC) samples extracted from Sloan Digital Sky Survey (SDSS-DR7) data. For the foreground-cleaned SEVEM, SMICA, NILC, and COMMANDER maps, we find 1.8-2.5 sigma detections of the kSZ signal, which are consistent with the kSZ evidence found in individual Planck raw frequency maps, although lower than found in the WMAP-9yr W-band (3.3 sigma). We further reconstruct the peculiar velocity field from the CG density field, and compute for the first time the cross-correlation function between kSZ temperature fluctuations and estimates of CG radial peculiar velocities. This correlation function yields a 3.0-3.7 sigma detection of the peculiar motion of extended gas on Mpc scales in flows correlated up to distances of 80-100 h^-1 Mpc. Both the pairwise momentum estimates and the kSZ temperature-velocity field correlation find evidence for kSZ signatures out to apertures of 8 arcmin and beyond, corresponding to a physical radius of >1 Mpc, more than twice the mean virial radius of halos. This is consistent with the predictions from hydrodynamical simulations that most of the baryons are outside the virialized halos. We fit a simple model, in which the temperature-velocity cross-correlation is proportional to the signal seen in a semi-analytic model built upon N-body simulations, and interpret the proportionality constant as an effective optical depth to Thomson scattering. We find tau(T) = (1.4 +/- 0.5) x 10^-4; the simplest interpretation of this measurement is that much of the gas is in a diffuse phase, which contributes little signal to X-ray or thermal Sunyaev-Zeldovich observations.

Original language	English
Article number	A140
Journal	Astronomy and Astrophysics
Volume	586
Number of pages	14
ISSN	0004-6361
DOIs	https://doi.org/10.1051/0004-6361/201526328
Publication status	Published - 2016

Keywords

Cosmology: observations
Cosmic microwave background
Large-scale structure of the Universe
Galaxies: clusters: general
Methods: data analysis

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Ade, P. A. R., Aghanim, N., Arnaud, M., Ashdown, M., Aubourg, E., Aumont, J., Baccigalupi, C., Banday, A. J., Barreiro, R. B., Bartolo, N., Battaner, E., Benabed, K., Benoit-Levy, A., Bersanelli, M., Bielewicz, P., Bock, J. J., Bonaldi, A., Bonavera, L., Bond, J. R., ... Zonca, A. (2016). Planck intermediate results XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect. Astronomy and Astrophysics, 586, [A140]. https://doi.org/10.1051/0004-6361/201526328

@article{b33b7284cc79408b80f392770e6dda27,

title = "Planck intermediate results XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect",

abstract = "By looking at the kinetic Sunyaev-Zeldovich effect (kSZ) in Planck nominal mission data, we present a significant detection of baryons participating in large-scale bulk flows around central galaxies (CGs) at redshift z approximate to 0.1. We estimate the pairwise momentum of the kSZ temperature fluctuations at the positions of the Central Galaxy Catalogue (CGC) samples extracted from Sloan Digital Sky Survey (SDSS-DR7) data. For the foreground-cleaned SEVEM, SMICA, NILC, and COMMANDER maps, we find 1.8-2.5 sigma detections of the kSZ signal, which are consistent with the kSZ evidence found in individual Planck raw frequency maps, although lower than found in the WMAP-9yr W-band (3.3 sigma). We further reconstruct the peculiar velocity field from the CG density field, and compute for the first time the cross-correlation function between kSZ temperature fluctuations and estimates of CG radial peculiar velocities. This correlation function yields a 3.0-3.7 sigma detection of the peculiar motion of extended gas on Mpc scales in flows correlated up to distances of 80-100 h-1 Mpc. Both the pairwise momentum estimates and the kSZ temperature-velocity field correlation find evidence for kSZ signatures out to apertures of 8 arcmin and beyond, corresponding to a physical radius of >1 Mpc, more than twice the mean virial radius of halos. This is consistent with the predictions from hydrodynamical simulations that most of the baryons are outside the virialized halos. We fit a simple model, in which the temperature-velocity cross-correlation is proportional to the signal seen in a semi-analytic model built upon N-body simulations, and interpret the proportionality constant as an effective optical depth to Thomson scattering. We find tau(T) = (1.4 +/- 0.5) x 10-4; the simplest interpretation of this measurement is that much of the gas is in a diffuse phase, which contributes little signal to X-ray or thermal Sunyaev-Zeldovich observations.",

keywords = "Cosmology: observations, Cosmic microwave background, Large-scale structure of the Universe, Galaxies: clusters: general, Methods: data analysis",

author = "Ade, {P. A. R.} and N. Aghanim and M. Arnaud and M. Ashdown and E. Aubourg and J. Aumont and C. Baccigalupi and Banday, {A. J.} and Barreiro, {R. B.} and N. Bartolo and E. Battaner and K. Benabed and A. Benoit-Levy and M. Bersanelli and P. Bielewicz and Bock, {J. J.} and A. Bonaldi and L. Bonavera and Bond, {J. R.} and J. Borrill and Bouchet, {F. R.} and C. Burigana and E. Calabrese and Cardoso, {J. -F.} and A. Catalano and A. Chamballu and Chiang, {H. C.} and Christensen, {P. R.} and Clements, {D. L.} and Colombo, {L. P. L.} and C. Combet and Crill, {B. P.} and A. Curto and F. Cuttaia and L. Danese and Davies, {R. D.} and Davis, {R. J.} and {de Bernardis}, P. and {De Zotti}, Giulia and J. Delabrouille and C. Dickinson and Diego, {J. M.} and K. Dolag and S. Donzelli and O. Dore and M. Douspis and A. Ducout and X. Dupac and G. Efstathiou and F. Elsner and Ensslin, {T. A.} and Eriksen, {H. K.} and F. Finelli and O. Forni and M. Frailis and Fraisse, {A. A.} and E. Franceschi and A. Frejsel and S. Galeotta and S. Galli and K. Ganga and Genova-Santos, {R. T.} and M. Giard and E. Gjerlow and J. Gonzalez-Nuevo and Gorski, {K. M.} and A. Gregorio and A. Gruppuso and Hansen, {F. K.} and Harrison, {D. L.} and S. Henrot-Versille and C. Hernandez-Monteagudo and D. Herranz and Hildebrandt, {S. R.} and E. Hivon and M. Hobson and Allan Hornstrup and Huffenberger, {K. M.} and G. Hurier and Jaffe, {A. H.} and Jaffe, {T. R.} and Jones, {W. C.} and M. Juvela and E. Keihanen and R. Keskitalo and F. Kitaura and R. Kneissl and J. Knoche and M. Kunz and H. Kurki-Suonio and G. Lagache and Lamarre, {J. -M.} and A. Lasenby and M. Lattanzi and Lawrence, {C. R.} and R. Leonardi and J. Leon-Tavares and F. Levrier and M. Liguori and Lilje, {P. B.} and Michael Linden-V{\o}rnle and M. Lopez-Caniego and Lubin, {P. M.} and Ma, {Y. -Z.} and Macias-Perez, {J. F.} and B. Maffei and D. Maino and Mak, {D. S. Y.} and N. Mandolesi and A. Mangilli and M. Maris and Martin, {P. G.} and E. Martinez-Gonzalez and S. Masi and S. Matarrese and P. McGehee and A. Melchiorri and A. Mennella and M. Migliaccio and Miville-Deschenes, {M. -A.} and A. Moneti and L. Montier and G. Morgante and D. Mortlock and D. Munshi and Murphy, {J. A.} and P. Naselsky and F. Nati and P. Natoli and F. Noviello and D. Novikov and I. Novikov and Oxborrow, {Carol Anne} and L. Pagano and Fernand Pajot and D. Paoletti and O. Perdereau and L. Perotto and V. Pettorino and F. Piacentini and M. Piat and E. Pierpaoli and E. Pointecouteau and G. Polenta and N. Pontineu and Pratt, {G. W.} and Puget, {J. -L.} and S. Puisieux and Rachen, {J. P.} and B. Racine and Reach, {W. T.} and M. Reinecke and M. Remazeilles and C. Renault and A. Renzi and I. Ristorcelli and G. Rocha and C. Rosset and M. Rossetti and G. Roudier and Rubino-Martin, {J. A.} and B. Rusholme and M. Sandri and D. Santos and M. Savelainen and G. Savini and D. Scott and Spencer, {L. D.} and V. Stolyarov and R. Sudiwala and R. Sunyaev and D. Sutton and Suur-Uski, {A. -S.} and Sygnet, {J. -F.} and Tauber, {J. A.} and L. Terenzi and L. Toffolatti and M. Tomasi and M. Tucci and L. Valenziano and J. Valiviita and {Van Tent}, B. and P. Vielva and F. Villa and Wade, {L. A.} and Wandelt, {B. D.} and W. Wang and Wehus, {I. K.} and D. Yvon and A. Zacchei and A. Zonca",

year = "2016",

doi = "10.1051/0004-6361/201526328",

language = "English",

volume = "586",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Ade, PAR, Aghanim, N, Arnaud, M, Ashdown, M, Aubourg, E, Aumont, J, Baccigalupi, C, Banday, AJ, Barreiro, RB, Bartolo, N, Battaner, E, Benabed, K, Benoit-Levy, A, Bersanelli, M, Bielewicz, P, Bock, JJ, Bonaldi, A, Bonavera, L, Bond, JR, Borrill, J, Bouchet, FR, Burigana, C, Calabrese, E, Cardoso, J-F, Catalano, A, Chamballu, A, Chiang, HC, Christensen, PR, Clements, DL, Colombo, LPL, Combet, C, Crill, BP, Curto, A, Cuttaia, F, Danese, L, Davies, RD, Davis, RJ, de Bernardis, P, De Zotti, G, Delabrouille, J, Dickinson, C, Diego, JM, Dolag, K, 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, Frejsel, A, Galeotta, S, Galli, S, Ganga, K, Genova-Santos, RT, Giard, M, Gjerlow, E, Gonzalez-Nuevo, J, Gorski, KM, Gregorio, A, Gruppuso, A, Hansen, FK, Harrison, DL, Henrot-Versille, S, Hernandez-Monteagudo, C, Herranz, D, Hildebrandt, SR, Hivon, E, Hobson, M, Hornstrup, A, Huffenberger, KM, Hurier, G, Jaffe, AH, Jaffe, TR, Jones, WC, Juvela, M, Keihanen, E, Keskitalo, R, Kitaura, F, Kneissl, R, Knoche, J, Kunz, M, Kurki-Suonio, H, Lagache, G, Lamarre, J-M, Lasenby, A, Lattanzi, M, Lawrence, CR, Leonardi, R, Leon-Tavares, J, Levrier, F, Liguori, M, Lilje, PB, Linden-Vørnle, M, Lopez-Caniego, M, Lubin, PM, Ma, Y-Z, Macias-Perez, JF, Maffei, B, Maino, D, Mak, DSY, Mandolesi, N, Mangilli, A, Maris, M, Martin, PG, Martinez-Gonzalez, E, Masi, S, Matarrese, S, McGehee, P, Melchiorri, A, Mennella, A, Migliaccio, M, 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, Oxborrow, CA, Pagano, L, Pajot, F, Paoletti, D, Perdereau, O, Perotto, L, Pettorino, V, Piacentini, F, Piat, M, Pierpaoli, E, Pointecouteau, E, Polenta, G, Pontineu, N, Pratt, GW, Puget, J-L, Puisieux, S, Rachen, JP, Racine, B, Reach, WT, 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, Scott, D, Spencer, LD, Stolyarov, V, Sudiwala, R, Sunyaev, R, Sutton, D, Suur-Uski, A-S, Sygnet, J-F, Tauber, JA, Terenzi, L, Toffolatti, L, Tomasi, M, Tucci, M, Valenziano, L, Valiviita, J, Van Tent, B, Vielva, P, Villa, F, Wade, LA, Wandelt, BD, Wang, W, Wehus, IK, Yvon, D, Zacchei, A & Zonca, A 2016, 'Planck intermediate results XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect', Astronomy and Astrophysics, vol. 586, A140. https://doi.org/10.1051/0004-6361/201526328

TY - JOUR

T1 - Planck intermediate results XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect

AU - Ade, P. A. R.

AU - Aghanim, N.

AU - Arnaud, M.

AU - Ashdown, M.

AU - Aubourg, E.

AU - Aumont, J.

AU - Baccigalupi, C.

AU - Banday, A. J.

AU - Barreiro, R. B.

AU - Bartolo, N.

AU - Battaner, E.

AU - Benabed, K.

AU - Benoit-Levy, A.

AU - Bersanelli, M.

AU - Bielewicz, P.

AU - Bock, J. J.

AU - Bonaldi, A.

AU - Bonavera, L.

AU - Bond, J. R.

AU - Borrill, J.

AU - Bouchet, F. R.

AU - Burigana, C.

AU - Calabrese, E.

AU - Cardoso, J. -F.

AU - Catalano, A.

AU - Chamballu, A.

AU - Chiang, H. C.

AU - Christensen, P. R.

AU - Clements, D. L.

AU - Colombo, L. P. L.

AU - Combet, C.

AU - Crill, B. P.

AU - Curto, A.

AU - Cuttaia, F.

AU - Danese, L.

AU - Davies, R. D.

AU - Davis, R. J.

AU - de Bernardis, P.

AU - De Zotti, Giulia

AU - Delabrouille, J.

AU - Dickinson, C.

AU - Diego, J. M.

AU - Dolag, K.

AU - Donzelli, S.

AU - Dore, O.

AU - Douspis, M.

AU - Ducout, A.

AU - Dupac, X.

AU - Efstathiou, G.

AU - Elsner, F.

AU - Ensslin, T. A.

AU - Eriksen, H. K.

AU - Finelli, F.

AU - Forni, O.

AU - Frailis, M.

AU - Fraisse, A. A.

AU - Franceschi, E.

AU - Frejsel, A.

AU - Galeotta, S.

AU - Galli, S.

AU - Ganga, K.

AU - Genova-Santos, R. T.

AU - Giard, M.

AU - Gjerlow, E.

AU - Gonzalez-Nuevo, J.

AU - Gorski, K. M.

AU - Gregorio, A.

AU - Gruppuso, A.

AU - Hansen, F. K.

AU - Harrison, D. L.

AU - Henrot-Versille, S.

AU - Hernandez-Monteagudo, C.

AU - Herranz, D.

AU - Hildebrandt, S. R.

AU - Hivon, E.

AU - Hobson, M.

AU - Hornstrup, Allan

AU - Huffenberger, K. M.

AU - Hurier, G.

AU - Jaffe, A. H.

AU - Jaffe, T. R.

AU - Jones, W. C.

AU - Juvela, M.

AU - Keihanen, E.

AU - Keskitalo, R.

AU - Kitaura, F.

AU - Kneissl, R.

AU - Knoche, J.

AU - Kunz, M.

AU - Kurki-Suonio, H.

AU - Lagache, G.

AU - Lamarre, J. -M.

AU - Lasenby, A.

AU - Lattanzi, M.

AU - Lawrence, C. R.

AU - Leonardi, R.

AU - Leon-Tavares, J.

AU - Levrier, F.

AU - Liguori, M.

AU - Lilje, P. B.

AU - Linden-Vørnle, Michael

AU - Lopez-Caniego, M.

AU - Lubin, P. M.

AU - Ma, Y. -Z.

AU - Macias-Perez, J. F.

AU - Maffei, B.

AU - Maino, D.

AU - Mak, D. S. Y.

AU - Mandolesi, N.

AU - Mangilli, A.

AU - Maris, M.

AU - Martin, P. G.

AU - Martinez-Gonzalez, E.

AU - Masi, S.

AU - Matarrese, S.

AU - McGehee, P.

AU - Melchiorri, A.

AU - Mennella, A.

AU - Migliaccio, M.

AU - Miville-Deschenes, M. -A.

AU - Moneti, A.

AU - Montier, L.

AU - Morgante, G.

AU - Mortlock, D.

AU - Munshi, D.

AU - Murphy, J. A.

AU - Naselsky, P.

AU - Nati, F.

AU - Natoli, P.

AU - Noviello, F.

AU - Novikov, D.

AU - Novikov, I.

AU - Oxborrow, Carol Anne

AU - Pagano, L.

AU - Pajot, Fernand

AU - Paoletti, D.

AU - Perdereau, O.

AU - Perotto, L.

AU - Pettorino, V.

AU - Piacentini, F.

AU - Piat, M.

AU - Pierpaoli, E.

AU - Pointecouteau, E.

AU - Polenta, G.

AU - Pontineu, N.

AU - Pratt, G. W.

AU - Puget, J. -L.

AU - Puisieux, S.

AU - Rachen, J. P.

AU - Racine, B.

AU - Reach, W. T.

AU - Reinecke, M.

AU - Remazeilles, M.

AU - Renault, C.

AU - Renzi, A.

AU - Ristorcelli, I.

AU - Rocha, G.

AU - Rosset, C.

AU - Rossetti, M.

AU - Roudier, G.

AU - Rubino-Martin, J. A.

AU - Rusholme, B.

AU - Sandri, M.

AU - Santos, D.

AU - Savelainen, M.

AU - Savini, G.

AU - Scott, D.

AU - Spencer, L. D.

AU - Stolyarov, V.

AU - Sudiwala, R.

AU - Sunyaev, R.

AU - Sutton, D.

AU - Suur-Uski, A. -S.

AU - Sygnet, J. -F.

AU - Tauber, J. A.

AU - Terenzi, L.

AU - Toffolatti, L.

AU - Tomasi, M.

AU - Tucci, M.

AU - Valenziano, L.

AU - Valiviita, J.

AU - Van Tent, B.

AU - Vielva, P.

AU - Villa, F.

AU - Wade, L. A.

AU - Wandelt, B. D.

AU - Wang, W.

AU - Wehus, I. K.

AU - Yvon, D.

AU - Zacchei, A.

AU - Zonca, A.

PY - 2016

Y1 - 2016

N2 - By looking at the kinetic Sunyaev-Zeldovich effect (kSZ) in Planck nominal mission data, we present a significant detection of baryons participating in large-scale bulk flows around central galaxies (CGs) at redshift z approximate to 0.1. We estimate the pairwise momentum of the kSZ temperature fluctuations at the positions of the Central Galaxy Catalogue (CGC) samples extracted from Sloan Digital Sky Survey (SDSS-DR7) data. For the foreground-cleaned SEVEM, SMICA, NILC, and COMMANDER maps, we find 1.8-2.5 sigma detections of the kSZ signal, which are consistent with the kSZ evidence found in individual Planck raw frequency maps, although lower than found in the WMAP-9yr W-band (3.3 sigma). We further reconstruct the peculiar velocity field from the CG density field, and compute for the first time the cross-correlation function between kSZ temperature fluctuations and estimates of CG radial peculiar velocities. This correlation function yields a 3.0-3.7 sigma detection of the peculiar motion of extended gas on Mpc scales in flows correlated up to distances of 80-100 h-1 Mpc. Both the pairwise momentum estimates and the kSZ temperature-velocity field correlation find evidence for kSZ signatures out to apertures of 8 arcmin and beyond, corresponding to a physical radius of >1 Mpc, more than twice the mean virial radius of halos. This is consistent with the predictions from hydrodynamical simulations that most of the baryons are outside the virialized halos. We fit a simple model, in which the temperature-velocity cross-correlation is proportional to the signal seen in a semi-analytic model built upon N-body simulations, and interpret the proportionality constant as an effective optical depth to Thomson scattering. We find tau(T) = (1.4 +/- 0.5) x 10-4; the simplest interpretation of this measurement is that much of the gas is in a diffuse phase, which contributes little signal to X-ray or thermal Sunyaev-Zeldovich observations.

AB - By looking at the kinetic Sunyaev-Zeldovich effect (kSZ) in Planck nominal mission data, we present a significant detection of baryons participating in large-scale bulk flows around central galaxies (CGs) at redshift z approximate to 0.1. We estimate the pairwise momentum of the kSZ temperature fluctuations at the positions of the Central Galaxy Catalogue (CGC) samples extracted from Sloan Digital Sky Survey (SDSS-DR7) data. For the foreground-cleaned SEVEM, SMICA, NILC, and COMMANDER maps, we find 1.8-2.5 sigma detections of the kSZ signal, which are consistent with the kSZ evidence found in individual Planck raw frequency maps, although lower than found in the WMAP-9yr W-band (3.3 sigma). We further reconstruct the peculiar velocity field from the CG density field, and compute for the first time the cross-correlation function between kSZ temperature fluctuations and estimates of CG radial peculiar velocities. This correlation function yields a 3.0-3.7 sigma detection of the peculiar motion of extended gas on Mpc scales in flows correlated up to distances of 80-100 h-1 Mpc. Both the pairwise momentum estimates and the kSZ temperature-velocity field correlation find evidence for kSZ signatures out to apertures of 8 arcmin and beyond, corresponding to a physical radius of >1 Mpc, more than twice the mean virial radius of halos. This is consistent with the predictions from hydrodynamical simulations that most of the baryons are outside the virialized halos. We fit a simple model, in which the temperature-velocity cross-correlation is proportional to the signal seen in a semi-analytic model built upon N-body simulations, and interpret the proportionality constant as an effective optical depth to Thomson scattering. We find tau(T) = (1.4 +/- 0.5) x 10-4; the simplest interpretation of this measurement is that much of the gas is in a diffuse phase, which contributes little signal to X-ray or thermal Sunyaev-Zeldovich observations.

KW - Cosmology: observations

KW - Cosmic microwave background

KW - Large-scale structure of the Universe

KW - Galaxies: clusters: general

KW - Methods: data analysis

U2 - 10.1051/0004-6361/201526328

DO - 10.1051/0004-6361/201526328

M3 - Journal article

SN - 0004-6361

VL - 586

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A140

ER -

Planck intermediate results XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect

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