BONTEMPS, Sylvain
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Observatoire aquitain des sciences de l'univers [OASU]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]

COHEN, M.

COMPIEGNE, M.

COX, P.

DARTOIS, E.
Institut d'astrophysique spatiale [IAS]

DAVIS, G.
Department of Ecology and Evolutionary Biology [Princeton]

EMERY, R.

FULTON, T.

GRY, C.
Laboratoire d'Astrophysique de Marseille [LAM]

HABART, E.
Institut d'astrophysique spatiale [IAS]

HUANG, M.
National Astronomical Observatories [Beijing] [NAOC]

JOBLIN, C.
Centre d'étude spatiale des rayonnements [CESR]

JONES, S. C.

KIRK, J.
School of Physics and Astronomy [Cardiff]

LIM, T.
Laboratoire de Probabilités et Modèles Aléatoires [LPMA]

MADDEN, S.
Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée [DAPNIA]

MAKIWA, G.

MENSHCHIKOV, A.

MOLINARI, S.
Istituto di Fisica dello Spazio Interplanetario [IFSI]

MOSELEY, H.

MOTTE, F.
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
Institut de Recherches sur les lois Fondamentales de l'Univers [IRFU]

NAYLOR, D. A.

OKUMURA, K.

GOCALVEZ, D. Pinheiro

POLEHAMPTON, E.

RODÓN, J. A.

RUSSEI, D.

SARACENO, P.
Istituto di Fisica dello Spazio Interplanetario [IFSI]

SCHNEIDER, N.
Astrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]

SIDHER, S.

SPENCER, L.

SWINYARD, B.

WARD-THOMPSON, D.
School of Physics and Astronomy [Cardiff]

WHITE, G. J.
Engineering Department

ZAVAGNO, Annie
Laboratoire d'Astrophysique de Marseille [LAM]
Observatoire Astronomique de Marseille Provence [OAMP]

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Astronomy and Astrophysics - A&A. 2010, vol. 518, p. L104

EDP Sciences

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We present a power spectrum analysis of the Herschel-SPIRE observations of the Polaris flare, a high Galactic latitude cirrus cloud midway between the diffuse and molecular phases. The SPIRE images of the Polaris flare reveal for the first time the structure of the diffuse interstellar medium down to 0.01 parsec over a 10 square degrees region. These exceptional observations highlight the highly filamentary and clumpy structure of the interstellar medium even in diffuse regions of the map. The power spectrum analysis shows that the structure of the interstellar medium is well described by a single power law with an exponent of -2.7 +- 0.1 at all scales from 30" to 8 degrees. That the power spectrum slope of the dust emission is constant down to the SPIRE angular resolution is an indication that the inertial range of turbulence extends down to the 0.01 pc scale. The power spectrum analysis also allows the identification of a Poissonian component at sub-arcminute scales in agreement with predictions of the cosmic infrared background level at SPIRE wavelengths. Finally, the comparison of the SPIRE and IRAS 100 micron data of the Polaris flare clearly assesses the capability of SPIRE in maping diffuse emission over large areas.< Réduire

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Herschel-SPIRE observations of the Polaris flare : structure of the diffuse interstellar medium at the sub-parsec scale

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