2016A&A...596A.108P

Query : 2016A&A...596A.108P

2016A&A...596A.108P - Astronomy and Astrophysics, volume 596A108-108 (2016/12-1)

Planck intermediate results. XLVII. Planck constraints on reionization history.

PLANCK COLLABORATION, ADAM R., AGHANIM N., ASHDOWN M., AUMONT J., BACCIGALUPI C., BALLARDINI M., BANDAY A.J., BARREIRO R.B., BARTOLO N., BASAK S., BATTYE R., BENABED K., BERNARD J.-P., BERSANELLI M., BIELEWICZ P., BOCK J.J., BONALDI A., BONAVERA L., BOND J.R., BORRILL J., BOUCHET F.R., BOULANGER F., BUCHER M., BURIGANA C., CALABRESE E., CARDOSO J.-F., CARRON J., CHIANG H.C., COLOMBO L.P.L., COMBET C., COMIS B., COUCHOT F., COULAIS A., CRILL B.P., CURTO A., CUTTAIA F., DAVIS R.J., DE BERNARDIS P., DE ROSA A., DE ZOTTI G., DELABROUILLE J., DI VALENTINO E., DICKINSON C., DIEGO J.M., DORE O., DOUSPIS M., DUCOUT A., DUPAC X., ELSNER F., ENSSLIN T.A., ERIKSEN H.K., FALGARONE E., FANTAYE Y., FINELLI F., FORASTIERI F., FRAILIS M., FRAISSE A.A., FRANCESCHI E., FROLOV A., GALEOTTA S., GALLI S., GANGA K., GENOVA-SANTOS R.T., GERBINO M., GHOSH T., GONZALEZ-NUEVO J., GORSKI K.M., GRUPPUSO A., GUDMUNDSSON J.E., HANSEN F.K., HELOU G., HENROT-VERSILLE S., HERRANZ D., HIVON E., HUANG Z., ILIC S., JAFFE A.H., JONES W.C., KEIHANEN E., KESKITALO R., KISNER T.S., KNOX L., KRACHMALNICOFF N., KUNZ M., KURKI-SUONIO H., LAGACHE G., LAHTEENMAKI A., LAMARRE J.-M., LANGER M., LASENBY A., LATTANZI M., LAWRENCE C.R., LE JEUNE M., LEVRIER F., LEWIS A., LIGUORI M., LILJE P.B., LOPEZ-CANIEGO M., MA Y.-Z., MACIAS-PEREZ J.F., MAGGIO G., MANGILLI A., MARIS M., MARTIN P.G., MARTINEZ-GONZALEZ E., MATARRESE S., MAURI N., McEWEN J.D., MEINHOLD P.R., MELCHIORRI A., MENNELLA A., MIGLIACCIO M., MIVILLE-DESCHENES M.-A., MOLINARI D., MONETI A., MONTIER L., MORGANTE G., MOSS A., NASELSKY P., NATOLI P., OXBORROW C.A., PAGANO L., PAOLETTI D., PARTRIDGE B., PATANCHON G., PATRIZII L., PERDEREAU O., PEROTTO L., PETTORINO V., PIACENTINI F., PLASZCZYNSKI S., POLASTRI L., POLENTA G., PUGET J.-L., RACHEN J.P., RACINE B., REINECKE M., REMAZEILLES M., RENZI A., ROCHA G., ROSSETTI M., ROUDIER G., RUBINO-MARTIN J.A., RUIZ-GRANADOS B., SALVATI L., SANDRI M., SAVELAINEN M., SCOTT D., SIRRI G., SUNYAEV R., SUUR-USKI A.-S., TAUBER J.A., TENTI M., TOFFOLATTI L., TOMASI M., TRISTRAM M., TROMBETTI T., VALIVIITA J., VAN TENT F., VIELVA P., VILLA F., VITTORIO N., WANDELT B.D., WEHUS I.K., WHITE M., ZACCHEI A. and ZONCA A.

Abstract (from CDS):

We investigate constraints on cosmic reionization extracted from the Planck cosmic microwave background (CMB) data. We combine the Planck CMB anisotropy data in temperature with the low-multipole polarization data to fit ΛCDM models with various parameterizations of the reionization history. We obtain a Thomson optical depth τ=0.058±0.012 for the commonly adopted instantaneous reionization model. This confirms, with data solely from CMB anisotropies, the low value suggested by combining Planck 2015 results with other data sets, and also reduces the uncertainties. We reconstruct the history of the ionization fraction using either a symmetric or an asymmetric model for the transition between the neutral and ionized phases. To determine better constraints on the duration of the reionization process, we also make use of measurements of the amplitude of the kinetic Sunyaev-Zeldovich (kSZ) effect using additional information from the high-resolution Atacama Cosmology Telescope and South Pole Telescope experiments. The average redshift at which reionization occurs is found to lie between z=7.8 and 8.8, depending on the model of reionization adopted. Using kSZ constraints and a redshift-symmetric reionization model, we find an upper limit to the width of the reionization period of Δz<2.8. In all cases, we find that the Universe is ionized at less than the 10% level at redshifts above z~=10. This suggests that an early onset of reionization is strongly disfavoured by the Planck data. We show that this result also reduces the tension between CMB-based analyses and constraints from other astrophysical sources.

Abstract Copyright: © ESO, 2016

Journal keyword(s): cosmic background radiation - dark ages, reionization, first stars - polarization

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	GRB 140515A	gB	12 24 15.48	+15 06 17.7						~	90	0

Query : 2016A&A...596A.108P

Basic data :

GRB 140515A -- Gamma-ray Burst
Other object types:	`gB (GRB)`, `Rad (2018MNRAS)`
ICRS coord. (ep=J2000) :	`12 24 15.48 +15 06 17.7 (X-ray) [ 1800 1800 0 ] D 2014GCN.16270....1G`
FK4 coord. (ep=B1950 eq=1950) :	`12 21 43.55 +15 22 54.8 [ 1800 1800 0 ]`
Gal coord. (ep=J2000) :	`273.83058 +76.41620 [ 1800 1800 0 ]`
Radial velocity / Redshift / cz :	`V(km/s) 288828 [~] / z(~) 6.327 [~] / cz 1896787 [~] D 2015MNRAS.448.1494K`

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GRB 140515A

References (90 between 1850 and 2026) (Total 90)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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