A Characterization of the Diffuse Galactic Emissions in the Anticenter of the Galaxy
Abstract
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 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.
Additional Information
© 2013 L. Fauvet et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Received 8 July 2012; Revised 27 November 2012; Accepted 20 December 2012. Academic Editor: Angelica de Oliveira-Costa. The authors would like to thank R. Davies and C. Dickinson for useful discussions. S. R. Hildebrandt would like to thank the LPSC and, especially, Dr. Juan Macias and Professor Daniel Santos for the time they spent at LPSC during 2010.Attached Files
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- Eprint ID
- 43607
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- CaltechAUTHORS:20140131-103641099
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2014-01-31Created from EPrint's datestamp field
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2021-11-10Created from EPrint's last_modified field