Spectral index variations of galactic emission
- Autores
- Testori, Juan Carlos; Reich, Patricia; Reich, Wolfgang
- Año de publicación
- 2004
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We have used all-sky maps at 45 MHz, 408 MHz, 1420 MHz and 22.8 GHz to calculate the distribution of spectral indices across the sky. This requires an adjustment of the adopted zero-levels of the different surveys, which was performed by temperature-versus-temperature (TT) plots. While at high frequencies a spectral steepening with increasing Galactic latitude is seen in the same way as it is observed in nearby galaxies seen edge-on, the spectral index distribution is more complex at lower frequencies. In general there is an agreement with the cooling-convection halo models by Lerche & Schlickeiser (1982), but also local magnetic field variations and variations of the cosmic-ray electron energy spectrum may explain the distribution of low-frequency spectral indices.
Fil: Testori, Juan Carlos. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Reich, Patricia. Max Planck Institut für Radioastronomie; Alemania
Fil: Reich, Wolfgang. Max Planck Institut für Radioastronomie; Alemania - Materia
-
Galactic Emission
Spectral Index
Surveys - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/29732
Ver los metadatos del registro completo
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Spectral index variations of galactic emissionTestori, Juan CarlosReich, PatriciaReich, WolfgangGalactic EmissionSpectral IndexSurveyshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We have used all-sky maps at 45 MHz, 408 MHz, 1420 MHz and 22.8 GHz to calculate the distribution of spectral indices across the sky. This requires an adjustment of the adopted zero-levels of the different surveys, which was performed by temperature-versus-temperature (TT) plots. While at high frequencies a spectral steepening with increasing Galactic latitude is seen in the same way as it is observed in nearby galaxies seen edge-on, the spectral index distribution is more complex at lower frequencies. In general there is an agreement with the cooling-convection halo models by Lerche & Schlickeiser (1982), but also local magnetic field variations and variations of the cosmic-ray electron energy spectrum may explain the distribution of low-frequency spectral indices.Fil: Testori, Juan Carlos. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Reich, Patricia. Max Planck Institut für Radioastronomie; AlemaniaFil: Reich, Wolfgang. Max Planck Institut für Radioastronomie; AlemaniaCopernicus GmbH, Katlenburg-Lindau2004-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/29732Testori, Juan Carlos; Reich, Patricia; Reich, Wolfgang; Spectral index variations of galactic emission; Copernicus GmbH, Katlenburg-Lindau; Proceedings of the Magnetized Interstellar Medium; 1; 12-2004; 63-68CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/abs/2004mim..proc...63Rinfo:eu-repo/semantics/altIdentifier/url/http://articles.adsabs.harvard.edu/full/2004mim..proc...63Rinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:36:36Zoai:ri.conicet.gov.ar:11336/29732instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:36:36.579CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Spectral index variations of galactic emission |
title |
Spectral index variations of galactic emission |
spellingShingle |
Spectral index variations of galactic emission Testori, Juan Carlos Galactic Emission Spectral Index Surveys |
title_short |
Spectral index variations of galactic emission |
title_full |
Spectral index variations of galactic emission |
title_fullStr |
Spectral index variations of galactic emission |
title_full_unstemmed |
Spectral index variations of galactic emission |
title_sort |
Spectral index variations of galactic emission |
dc.creator.none.fl_str_mv |
Testori, Juan Carlos Reich, Patricia Reich, Wolfgang |
author |
Testori, Juan Carlos |
author_facet |
Testori, Juan Carlos Reich, Patricia Reich, Wolfgang |
author_role |
author |
author2 |
Reich, Patricia Reich, Wolfgang |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Galactic Emission Spectral Index Surveys |
topic |
Galactic Emission Spectral Index Surveys |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
We have used all-sky maps at 45 MHz, 408 MHz, 1420 MHz and 22.8 GHz to calculate the distribution of spectral indices across the sky. This requires an adjustment of the adopted zero-levels of the different surveys, which was performed by temperature-versus-temperature (TT) plots. While at high frequencies a spectral steepening with increasing Galactic latitude is seen in the same way as it is observed in nearby galaxies seen edge-on, the spectral index distribution is more complex at lower frequencies. In general there is an agreement with the cooling-convection halo models by Lerche & Schlickeiser (1982), but also local magnetic field variations and variations of the cosmic-ray electron energy spectrum may explain the distribution of low-frequency spectral indices. Fil: Testori, Juan Carlos. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina Fil: Reich, Patricia. Max Planck Institut für Radioastronomie; Alemania Fil: Reich, Wolfgang. Max Planck Institut für Radioastronomie; Alemania |
description |
We have used all-sky maps at 45 MHz, 408 MHz, 1420 MHz and 22.8 GHz to calculate the distribution of spectral indices across the sky. This requires an adjustment of the adopted zero-levels of the different surveys, which was performed by temperature-versus-temperature (TT) plots. While at high frequencies a spectral steepening with increasing Galactic latitude is seen in the same way as it is observed in nearby galaxies seen edge-on, the spectral index distribution is more complex at lower frequencies. In general there is an agreement with the cooling-convection halo models by Lerche & Schlickeiser (1982), but also local magnetic field variations and variations of the cosmic-ray electron energy spectrum may explain the distribution of low-frequency spectral indices. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/29732 Testori, Juan Carlos; Reich, Patricia; Reich, Wolfgang; Spectral index variations of galactic emission; Copernicus GmbH, Katlenburg-Lindau; Proceedings of the Magnetized Interstellar Medium; 1; 12-2004; 63-68 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/29732 |
identifier_str_mv |
Testori, Juan Carlos; Reich, Patricia; Reich, Wolfgang; Spectral index variations of galactic emission; Copernicus GmbH, Katlenburg-Lindau; Proceedings of the Magnetized Interstellar Medium; 1; 12-2004; 63-68 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/abs/2004mim..proc...63R info:eu-repo/semantics/altIdentifier/url/http://articles.adsabs.harvard.edu/full/2004mim..proc...63R |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Copernicus GmbH, Katlenburg-Lindau |
publisher.none.fl_str_mv |
Copernicus GmbH, Katlenburg-Lindau |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |