A Characterization of the Diffuse Galactic Emissions in the Anticenter of the Galaxy

Using the Archeops and WMAP data, we perform a study of the anticenter Galactic diffuse emissions—thermal dust, synchrotron, free-free, and anomalous emissions—at degree scales. The high-frequency data are used to infer the thermal dust electromagnetic spectrum and spatial distribution allowing us t...

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Bibliographic Details
Published inAdvances in Astronomy Vol. 2013; no. 2013; pp. 204 - 211
Main Authors Fauvet, L., Macías-Pérez, J. F., Hildebrandt, S. R., Désert, F.-X.
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Limiteds 01.01.2013
Hindawi Puplishing Corporation
Hindawi Publishing Corporation
John Wiley & Sons, Inc
Hindawi Limited
Subjects
Analysis
Astrophysics
Cosmic background radiation
Dust
Electric waves
Electromagnetic radiation
Electromagnetic waves
Emissions
Galaxies
Observations
Radiation
United Kingdom
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Summary:Using the Archeops and WMAP data, we perform a study of the anticenter Galactic diffuse emissions—thermal dust, synchrotron, free-free, and anomalous emissions—at degree scales. The high-frequency data are used to infer the thermal dust electromagnetic spectrum and spatial distribution allowing us to precisely subtract this component at lower frequencies. After subtraction of the thermal dust component, a mixture of standard synchrotron and free-free emissions does not account for the residuals at these low frequencies. Including the all-sky 408 MHz Haslam data we find evidence for anomalous emission with a spectral index of −2.5 in TRJ units. However, we are not able to provide coclusion regarding the nature of this anomalous emission in this region. For this purpose, data between 408 MHz and 20 GHz covering the same sky region are needed.
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ISSN:1687-7969
1687-7977
DOI:10.1155/2013/746020