Small-scale structure of the galactic cirrus emission

Details Small-scale structure of the galactic cirrus emission Small-scale structure of the galactic cirrus emission

2002-12-04

arxiv.org/abs/astro-ph/0212094v1

Astron.Astrophys.399:177-186,2003

Astronomy and Astrophysics

Astrophysics

10 pages; 7 figures; Astronomy & Astrophysics, accepted

Scientific paper

10.1051/0004-6361:20021787

We examined the Fourier power spectrum characteristics of cirrus structures in 13 sky fields with faint to bright cirrus emission observed with ISOPHOT in the 90--200µm wavelength range in order to study variations of the spectral index $\alpha$. We found that $\alpha$ varies from field to field with --5.3 $\le$ $\alpha$ $\le$ --2.1. It depends on the absolute surface brightness and on the hydrogen column density. We also found different spectral indices for the same sky region at different wavelengths. Longer wavelength measurements show steeper power spectra. This can be explained by the presence of dust at various temperatures, in particular of a cold extended component. For the faintest areas of the far-infrared sky we derive a wavelength independent spectral index of $\alpha$ = --2.3$\pm$0.6 for the cirrus power spectrum. The application of the correct spectral index is a precondition for the proper disentanglement of the cirrus foreground component of the Cosmic Far-Infrared Background and its fluctuations.

Affiliated with

Also associated with

No associations

Rating

Small-scale structure of the galactic cirrus emission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Small-scale structure of the galactic cirrus emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Small-scale structure of the galactic cirrus emission will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-264253