Temperature, brightness and spectral index of the Cygnus radio loop

Temperature, brightness and spectral index of the Cygnus radio loop

The estimated brightness of the Cygnus loop supernova remnant (SNR) at 2720, 1420, 820, 408 and 34.5 MHz is presented. The observations of the continuum radio emission are used to calculate the mean brightness temperatures and surface brightnesses of this loop at the five frequencies in a wide spectral range, using the method we have previously developed for large radio loops. The spectrum for mean temperatures versus frequency between the five frequencies is estimated and the spectral index of the Cygnus loop is obtained. Also, from our results it can be concluded that the Cygnus loop evolves in a low density environment and that the initial energy of the supernova explosion was relatively low. The results obtained confirm the non-thermal origin of the Cygnus radio loop and show that our method is applicable to almost all remnants.

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Main Authors: Borka Jovanovic,V., Urosevic,D
Format: Digital revista
Language:English
Published: Universidad Nacional Autónoma de México, Instituto de Astronomía 2011
Online Access:http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012011000100011
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spelling oai:scielo:S0185-110120110001000112011-09-30Temperature, brightness and spectral index of the Cygnus radio loopBorka Jovanovic,V.Urosevic,D ISM/supernova remnants radiation mechanisms/non-thermal radio continuum/general surveys The estimated brightness of the Cygnus loop supernova remnant (SNR) at 2720, 1420, 820, 408 and 34.5 MHz is presented. The observations of the continuum radio emission are used to calculate the mean brightness temperatures and surface brightnesses of this loop at the five frequencies in a wide spectral range, using the method we have previously developed for large radio loops. The spectrum for mean temperatures versus frequency between the five frequencies is estimated and the spectral index of the Cygnus loop is obtained. Also, from our results it can be concluded that the Cygnus loop evolves in a low density environment and that the initial energy of the supernova explosion was relatively low. The results obtained confirm the non-thermal origin of the Cygnus radio loop and show that our method is applicable to almost all remnants.info:eu-repo/semantics/openAccessUniversidad Nacional Autónoma de México, Instituto de AstronomíaRevista mexicana de astronomía y astrofísica v.47 n.1 20112011-04-01info:eu-repo/semantics/articletext/htmlhttp://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012011000100011en
institution SCIELO
collection OJS
country México
countrycode MX
component Revista
access En linea
databasecode rev-scielo-mx
tag revista
region America del Norte
libraryname SciELO
language English
format Digital
author Borka Jovanovic,V.
Urosevic,D
spellingShingle Borka Jovanovic,V.
Urosevic,D
Temperature, brightness and spectral index of the Cygnus radio loop
author_facet Borka Jovanovic,V.
Urosevic,D
author_sort Borka Jovanovic,V.
title Temperature, brightness and spectral index of the Cygnus radio loop
title_short Temperature, brightness and spectral index of the Cygnus radio loop
title_full Temperature, brightness and spectral index of the Cygnus radio loop
title_fullStr Temperature, brightness and spectral index of the Cygnus radio loop
title_full_unstemmed Temperature, brightness and spectral index of the Cygnus radio loop
title_sort temperature, brightness and spectral index of the cygnus radio loop
description The estimated brightness of the Cygnus loop supernova remnant (SNR) at 2720, 1420, 820, 408 and 34.5 MHz is presented. The observations of the continuum radio emission are used to calculate the mean brightness temperatures and surface brightnesses of this loop at the five frequencies in a wide spectral range, using the method we have previously developed for large radio loops. The spectrum for mean temperatures versus frequency between the five frequencies is estimated and the spectral index of the Cygnus loop is obtained. Also, from our results it can be concluded that the Cygnus loop evolves in a low density environment and that the initial energy of the supernova explosion was relatively low. The results obtained confirm the non-thermal origin of the Cygnus radio loop and show that our method is applicable to almost all remnants.
publisher Universidad Nacional Autónoma de México, Instituto de Astronomía
publishDate 2011
url http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012011000100011
work_keys_str_mv AT borkajovanovicv temperaturebrightnessandspectralindexofthecygnusradioloop
AT urosevicd temperaturebrightnessandspectralindexofthecygnusradioloop
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