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Structure of Diffuse Emission in the Spitzer Galactic First Look Survey

Ingalls, James G. and Reach, William T. and Noriega-Crespo, Alberto and Carey, Sean J. and Miville-Deschênes, M.-A. and Boulanger, F. (2006) Structure of Diffuse Emission in the Spitzer Galactic First Look Survey. In: The Spitzer Space Telescope: New Views of the Cosmos. ASP Conference Series. No.357. Astronomical Society of the Pacific , San Francisco, CA, pp. 81-84. ISBN 978-1-583812-25-9.

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The density and velocity structure of the interstellar medium (ISM) must be understood to address many astrophysical problems. We summarize the spatial statistics of 24 μm emission for 10 diffuse fields in the Spitzer Galactic First Look Survey. In almost all regions we analyzed, the x and y spectral indices are nearly equal, implying that the density structure in emitting regions is isotropic. All but one spectral index we measure is shallower than the index predicted by the theory of Kolmogorov (1941). We discuss the implications of our results in the light of recent simulations of magnetized and non-magnetized hydrodynamic turbulence.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Ingalls, James G.0000-0003-4714-1364
Reach, William T.0000-0001-8362-4094
Noriega-Crespo, Alberto0000-0002-6296-8960
Carey, Sean J.0000-0002-0221-6871
Additional Information:© 2006 Astronomical Society of the Pacific. We thank B. Draine for suggesting (in his review talk at this conference) a study of the possible anisotropy in the GFLS power spectra.
Group:Infrared Processing and Analysis Center (IPAC)
Series Name:ASP Conference Series
Issue or Number:357
Record Number:CaltechAUTHORS:20110629-134300501
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24256
Deposited By: Tony Diaz
Deposited On:29 Jun 2011 21:19
Last Modified:14 Nov 2019 23:55

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