Power Spectrum Analysis of Far-IR Background Fluctuations in Spitzer Maps at 160 Microns

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dc.creatorGrossan, Bruce
dc.creatorSmoot, George F.
dc.date2005-04-07
dc.date2006-04-20
dc.date.accessioned2026-07-07T06:37:10Z
dc.date.available2026-07-07T06:37:10Z
dc.descriptionWe describe data reduction and analysis of fluctuations in the Cosmic Far-IR Background (CFIB) in large maps observed with the Multiband Imaging Photometer for Spitzer (MIPS) instrument 160 micron detectors. We analyzed the extragalactic First Look Survey (FLS) and the Spitzer Wide-area Infrared Extragalactic Survey (SWIRE) Lockman Hole observations, the latter being the largest low-cirrus mapping observation available. In the Lockman Hole map, we measured the power spectrum of the CFIB by fitting a power law to the IR cirrus component, the dominant foreground contaminant, and subtracting this cirrus signal. The CFIB power spectrum at mid-high k (k ~ 0.2 - 0.5 arc min^-1) is consistent with previous measurements of a relatively flat component. At lower k, however, the power spectrum is clearly not flat, decreasing from our lowest frequencies (k ~ 0.03 arc min^-1) and flattening at mid-frequencies (k ~ 0.1 - 0.2 arc min^-1). This behavior is consistent with the gross characteristics of predictions of a source clustering signature in CFIB power spectra, and this is the first report of such a detection.
dc.descriptionPlease download the superior-quality, single file PDF, see additional figures of higher quality, and look for updates at http://www-astro.lbl.gov/~bruce/spitzerpaper1/ .(This version has submission text, but not submission graphics.)
dc.identifierhttps://arxiv.org/abs/astro-ph/0504167
dc.identifierhttp://arxiv.org/abs/astro-ph/0504167
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100297
dc.subjectAstrophysics
dc.titlePower Spectrum Analysis of Far-IR Background Fluctuations in Spitzer Maps at 160 Microns
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