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All-sky Galactic radiation at 45 MHz and spectral index between 45 and 408 MHz

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arxiv 1011.4298 v1 pith:QQM6LAIE submitted 2010-11-18 astro-ph.GA

Andres E. Guzmán , Jorge May , Hector Alvarez , Koitiro Maeda This is my paper · ORCID
classification astro-ph.GA
keywords galacticindexspectralall-skyemissionabsorptionaimsangular
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Aims: We study the Galactic large-scale synchrotron emission by generating a reliable all-sky spectral index map and temperature map at 45 MHz. Methods: We use our observations, the published all-sky map at 408 MHz, and a bibliographical compilation to produce a map corrected for zero-level offset and extragalactic contribution. Results: We present full sky maps of the Galactic emission at 45 MHz and the Galactic spectral index between 45 and 408 MHz with an angular resolution of 5\degs. The spectral index varies between 2.1 and 2.7, reaching values below 2.5 at low latitude because of thermal free-free absorption and its maximum in the zone next to the Northern Spur.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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    Resonant conversion of axion-like particles into photons in nanogauss primordial magnetic fields is claimed to explain both the ARCADE2 radio excess and the EDGES 21-cm trough for axion masses near 10^-14 to 10^-12 eV.

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    astro-ph.GA 2026-05 unverdicted novelty 3.0 of 10

    Comparison of Galactic magnetic field models to polarized synchrotron observations shows good agreement on angles but poor match on intensity, indicating local foreground structures must be incorporated.

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