Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-01-07
Astrophys.J.695:469-478,2009
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
25 pages, 7 figures, 2 tables, accepted to ApJ
Scientific paper
10.1088/0004-637X/695/1/469
We present an analysis of far-infrared dust emission from diffuse cirrus clouds. This study is based on serendipitous observations at 160 microns at high galactic latitude with the Multiband Imaging Photometer (MIPS) onboard the Spitzer Space Telescope by the Spitzer Infrared Nearby Galaxies Survey (SINGS). These observations are complemented with IRIS data at 100 and 60 microns and constitute one of the most sensitive and unbiased samples of far infrared observations at small scale of diffuse interstellar clouds. Outside regions dominated by the cosmic infrared background fluctuations, we observe a substantial scatter in the 160/100 colors from cirrus emission. We compared the 160/100 color variations to 60/100 colors in the same fields and find a trend of decreasing 60/100 with increasing 160/100. This trend can not be accounted for by current dust models by changing solely the interstellar radiation field. It requires a significant change of dust properties such as grain size distribution or emissivity or a mixing of clouds in different physical conditions along the line of sight. These variations are important as a potential confusing foreground for extragalactic studies.
Bot Caroline
Boulanger Francois
Draine Bruce
Helou George
Lagache Guilaine
No associations
LandOfFree
Serendipity observations of far infrared cirrus emission in the Spitzer Infrared Nearby Galaxies Survey: Analysis of far-infrared correlations 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 Serendipity observations of far infrared cirrus emission in the Spitzer Infrared Nearby Galaxies Survey: Analysis of far-infrared correlations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Serendipity observations of far infrared cirrus emission in the Spitzer Infrared Nearby Galaxies Survey: Analysis of far-infrared correlations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-720334