etter to the E ditor Herschel-SPIRE observations of the Polaris flare : Structure of the diffuse interstellar medium at the sub-parsec scale

Content Provider	Semantic Scholar
Author	Abergel, Alain Bernard, J. B. Boulanger, François Lagache, Guilaine Arab, Hossein Bontemps, Sylvain Cohen, Martin Compiègne, Mathieu Cox, Pierre Dartois, Emmanuel Fulton, Trevor Gry, Cécile Habart, Emilie Lim, Tanya Madden, Suzanne Makiwa, Gibion Menshchikov, Alexander Molinari, Sergio Moseley, Harvey Motte, Frédérique Okumura, Ko Rodon, Jordi A. Schneider, Nicola Ward-Thompson, Derek
Copyright Year	2010
Abstract	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◦. 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 μm data of the Polaris flare clearly assesses the capability of SPIRE in maping diffuse emission over large areas.
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Alternate Webpage(s)	http://oro.open.ac.uk/25152/1/glenn.pdf
Language	English
Access Restriction	Open
Subject Keyword	AngularJS Battle of Midway COSMIC Herschel graph Minute Unit of Plane Angle Parsec Spectral density Spectrum Analysis Turbulence antineoplaston A10 wavelength
Content Type	Text
Resource Type	Article