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...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2013-01-01
|
| Series: | Advances in Astronomy |
| Online Access: | http://dx.doi.org/10.1155/2013/746020 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832558042543030272 |
|---|---|
| author | L. Fauvet J. F. Macías-Pérez S. R. Hildebrandt F.-X. Désert |
| author_facet | L. Fauvet J. F. Macías-Pérez S. R. Hildebrandt F.-X. Désert |
| author_sort | L. Fauvet |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-749bcc736f8c4d84a182664c13770258 |
| institution | Kabale University |
| issn | 1687-7969 1687-7977 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Astronomy |
| spelling | doaj-art-749bcc736f8c4d84a182664c137702582025-02-03T01:33:19ZengWileyAdvances in Astronomy1687-79691687-79772013-01-01201310.1155/2013/746020746020A Characterization of the Diffuse Galactic Emissions in the Anticenter of the GalaxyL. Fauvet0J. F. Macías-Pérez1S. R. Hildebrandt2F.-X. Désert3Astrophysics Division, Research and Scientific Support Department, European Space Agency (ESA), Keplerlaan 1, 2201 AZ Noordwijk, The NetherlandsLPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, 53 Avenue des Martyrs, 38026 Grenoble Cedex, FranceLPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, 53 Avenue des Martyrs, 38026 Grenoble Cedex, FranceLaboratoire d’Astrophysique de Grenoble, IPAG, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, FranceUsing 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.http://dx.doi.org/10.1155/2013/746020 |
| spellingShingle | L. Fauvet J. F. Macías-Pérez S. R. Hildebrandt F.-X. Désert A Characterization of the Diffuse Galactic Emissions in the Anticenter of the Galaxy Advances in Astronomy |
| title | A Characterization of the Diffuse Galactic Emissions in the Anticenter of the Galaxy |
| title_full | A Characterization of the Diffuse Galactic Emissions in the Anticenter of the Galaxy |
| title_fullStr | A Characterization of the Diffuse Galactic Emissions in the Anticenter of the Galaxy |
| title_full_unstemmed | A Characterization of the Diffuse Galactic Emissions in the Anticenter of the Galaxy |
| title_short | A Characterization of the Diffuse Galactic Emissions in the Anticenter of the Galaxy |
| title_sort | characterization of the diffuse galactic emissions in the anticenter of the galaxy |
| url | http://dx.doi.org/10.1155/2013/746020 |
| work_keys_str_mv | AT lfauvet acharacterizationofthediffusegalacticemissionsintheanticenterofthegalaxy AT jfmaciasperez acharacterizationofthediffusegalacticemissionsintheanticenterofthegalaxy AT srhildebrandt acharacterizationofthediffusegalacticemissionsintheanticenterofthegalaxy AT fxdesert acharacterizationofthediffusegalacticemissionsintheanticenterofthegalaxy AT lfauvet characterizationofthediffusegalacticemissionsintheanticenterofthegalaxy AT jfmaciasperez characterizationofthediffusegalacticemissionsintheanticenterofthegalaxy AT srhildebrandt characterizationofthediffusegalacticemissionsintheanticenterofthegalaxy AT fxdesert characterizationofthediffusegalacticemissionsintheanticenterofthegalaxy |