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The extragalactic radio background
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Singal, J. Wuensche, C. A. Limon, M. Seiffert, M. Levin, S. M. Villela, T. Fixsen, D. J. Lubin, P. M. Kogut, A. Wollack, E. |
| Copyright Year | 2011 |
| Description | The existence of an isotropic component of the high-latitude radio sky has been recognized for nearly fifty years, but has typically been assumed to be Galactic in origin. We use recent radio observations to test whether the observed high-latitude component could originate within either an extended Galactic halo or a more local "bubble" structure. The lack of significant polarization from the isotropic component, combined with the lack of significant correlation with the Galactic far-infrared emission, rule out an origin within the Galaxy. We conclude that an extragalactic origin is the only viable alternative for the bulk of the isotropic high-latitude emission. The extragalactic component is 2-3 times brighter than local (Galactic) emission towards the Galactic poles and is consistent with a power law in frequency with amplitude T(sub r) = 24.1 plus or minus 2.1 K and spectral index beta = -2.599 plus or minus 0.036 evaluated at reference frequency 310 MHz. |
| File Size | 1177032 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110015448 |
| Archival Resource Key | ark:/13960/t4jm7816c |
| Language | English |
| Publisher Date | 2011-04-25 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Galactic Halos Isotropy Radio Emission Galaxies Continuums Diffuse Radiation Extragalactic Radio Sources Radio Observation Polar Regions Pixels Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
