Submillimeter and X-ray observations of an X class flare
- Autores
- Gimenez de Castro, Carlos Guillermo; Trottet, G.; Silva Valio, Adriana; Krucker, Sam; Costa, Joaquim; Kaufmann, Pierre; Correia, Emilia; Levato, Orlando Hugo
- Año de publicación
- 2009
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The GOES X1.5 class flare that occurred on August 30, 2002 at 1327:30 UT is one of the few events detected so far at submillimeter wavelengths. We present a detailed analysis of this flare combining radio observations from 1.5 to 212 GHz (an upper limit of the flux is also provided at 405 GHz) and X-ray. Although the observations of radio emission up to 212 GHz indicates that relativistic electrons with energies of a few MeV were accelerated, no significant hard X-ray emission was detected by RHESSI above ∼250 keV. Images at 12-20 and 50-100 keV reveal a very compact, but resolved, source of about ∼10" ×10". EUV TRACE images show a multi-kernel structure suggesting a complex (multipolar) magnetic topology. During the peak time the radio spectrum shows an extended flatness from ∼7 to 35 GHz. Modeling the optically thin part of the radio spectrum as gyrosynchrotron emission we obtained the electron spectrum (spectral index d, instantaneous number of emitting electrons). It is shown that in order to keep the expected X-ray emission from the same emitting electrons below the RHESSI background at 250 keV, a magnetic field above 500 G is necessary. On the other hand, the electron spectrum deduced from radio observations =50 GHz is harder than that deduced from 70-250 keV X-ray data, meaning that there must exist a breaking energy around a few hundred keV. During the decay of the impulsive phase, a hardening of the X-ray spectrum is observed which is interpreted as a hardening of the electron distribution spectrum produced by the diffusion due to Coulomb collisions of the trapped electrons in a medium with an electron density of ne ∼ 3-5 × 1010 cm-3. © 2009 ESO.
Fil: Gimenez de Castro, Carlos Guillermo. Universidad Presbiteriana Mackenzie. Centro de Radiotronomia y Astrofisica; Brasil
Fil: Trottet, G.. Observatorio de Paris; Francia
Fil: Silva Valio, Adriana. Universidad Presbiteriana Mackenzie. Centro de Radiotronomia y Astrofisica; Brasil
Fil: Krucker, Sam. University of California; Estados Unidos
Fil: Costa, Joaquim. Instituto Nacional de Pesquisas Espaciais; Brasil
Fil: Kaufmann, Pierre. Universidade Estadual de Campinas; Brasil
Fil: Correia, Emilia. Universidad Presbiteriana Mackenzie; Brasil
Fil: Levato, Orlando Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina - Materia
-
SUN: ACTIVITY
FLARES
PARTICLE EMISSION
RADIO RADIATION - 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:11336/171583
Ver los metadatos del registro completo
id |
CONICETDig_158c0d2a23591ac4d34bfc6bd56a5a2a |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/171583 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Submillimeter and X-ray observations of an X class flareGimenez de Castro, Carlos GuillermoTrottet, G.Silva Valio, AdrianaKrucker, SamCosta, JoaquimKaufmann, PierreCorreia, EmiliaLevato, Orlando HugoSUN: ACTIVITYFLARESPARTICLE EMISSIONRADIO RADIATIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The GOES X1.5 class flare that occurred on August 30, 2002 at 1327:30 UT is one of the few events detected so far at submillimeter wavelengths. We present a detailed analysis of this flare combining radio observations from 1.5 to 212 GHz (an upper limit of the flux is also provided at 405 GHz) and X-ray. Although the observations of radio emission up to 212 GHz indicates that relativistic electrons with energies of a few MeV were accelerated, no significant hard X-ray emission was detected by RHESSI above ∼250 keV. Images at 12-20 and 50-100 keV reveal a very compact, but resolved, source of about ∼10" ×10". EUV TRACE images show a multi-kernel structure suggesting a complex (multipolar) magnetic topology. During the peak time the radio spectrum shows an extended flatness from ∼7 to 35 GHz. Modeling the optically thin part of the radio spectrum as gyrosynchrotron emission we obtained the electron spectrum (spectral index d, instantaneous number of emitting electrons). It is shown that in order to keep the expected X-ray emission from the same emitting electrons below the RHESSI background at 250 keV, a magnetic field above 500 G is necessary. On the other hand, the electron spectrum deduced from radio observations =50 GHz is harder than that deduced from 70-250 keV X-ray data, meaning that there must exist a breaking energy around a few hundred keV. During the decay of the impulsive phase, a hardening of the X-ray spectrum is observed which is interpreted as a hardening of the electron distribution spectrum produced by the diffusion due to Coulomb collisions of the trapped electrons in a medium with an electron density of ne ∼ 3-5 × 1010 cm-3. © 2009 ESO.Fil: Gimenez de Castro, Carlos Guillermo. Universidad Presbiteriana Mackenzie. Centro de Radiotronomia y Astrofisica; BrasilFil: Trottet, G.. Observatorio de Paris; FranciaFil: Silva Valio, Adriana. Universidad Presbiteriana Mackenzie. Centro de Radiotronomia y Astrofisica; BrasilFil: Krucker, Sam. University of California; Estados UnidosFil: Costa, Joaquim. Instituto Nacional de Pesquisas Espaciais; BrasilFil: Kaufmann, Pierre. Universidade Estadual de Campinas; BrasilFil: Correia, Emilia. Universidad Presbiteriana Mackenzie; BrasilFil: Levato, Orlando Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaEDP Sciences2009-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/171583Gimenez de Castro, Carlos Guillermo; Trottet, G.; Silva Valio, Adriana; Krucker, Sam; Costa, Joaquim; et al.; Submillimeter and X-ray observations of an X class flare; EDP Sciences; Astronomy and Astrophysics; 507; 1; 11-2009; 433-4390004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/200912028info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2009/43/aa12028-09/aa12028-09.htmlinfo:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/0908.2339v1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:18:53Zoai:ri.conicet.gov.ar:11336/171583instacron: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 10:18:53.591CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Submillimeter and X-ray observations of an X class flare |
title |
Submillimeter and X-ray observations of an X class flare |
spellingShingle |
Submillimeter and X-ray observations of an X class flare Gimenez de Castro, Carlos Guillermo SUN: ACTIVITY FLARES PARTICLE EMISSION RADIO RADIATION |
title_short |
Submillimeter and X-ray observations of an X class flare |
title_full |
Submillimeter and X-ray observations of an X class flare |
title_fullStr |
Submillimeter and X-ray observations of an X class flare |
title_full_unstemmed |
Submillimeter and X-ray observations of an X class flare |
title_sort |
Submillimeter and X-ray observations of an X class flare |
dc.creator.none.fl_str_mv |
Gimenez de Castro, Carlos Guillermo Trottet, G. Silva Valio, Adriana Krucker, Sam Costa, Joaquim Kaufmann, Pierre Correia, Emilia Levato, Orlando Hugo |
author |
Gimenez de Castro, Carlos Guillermo |
author_facet |
Gimenez de Castro, Carlos Guillermo Trottet, G. Silva Valio, Adriana Krucker, Sam Costa, Joaquim Kaufmann, Pierre Correia, Emilia Levato, Orlando Hugo |
author_role |
author |
author2 |
Trottet, G. Silva Valio, Adriana Krucker, Sam Costa, Joaquim Kaufmann, Pierre Correia, Emilia Levato, Orlando Hugo |
author2_role |
author author author author author author author |
dc.subject.none.fl_str_mv |
SUN: ACTIVITY FLARES PARTICLE EMISSION RADIO RADIATION |
topic |
SUN: ACTIVITY FLARES PARTICLE EMISSION RADIO RADIATION |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The GOES X1.5 class flare that occurred on August 30, 2002 at 1327:30 UT is one of the few events detected so far at submillimeter wavelengths. We present a detailed analysis of this flare combining radio observations from 1.5 to 212 GHz (an upper limit of the flux is also provided at 405 GHz) and X-ray. Although the observations of radio emission up to 212 GHz indicates that relativistic electrons with energies of a few MeV were accelerated, no significant hard X-ray emission was detected by RHESSI above ∼250 keV. Images at 12-20 and 50-100 keV reveal a very compact, but resolved, source of about ∼10" ×10". EUV TRACE images show a multi-kernel structure suggesting a complex (multipolar) magnetic topology. During the peak time the radio spectrum shows an extended flatness from ∼7 to 35 GHz. Modeling the optically thin part of the radio spectrum as gyrosynchrotron emission we obtained the electron spectrum (spectral index d, instantaneous number of emitting electrons). It is shown that in order to keep the expected X-ray emission from the same emitting electrons below the RHESSI background at 250 keV, a magnetic field above 500 G is necessary. On the other hand, the electron spectrum deduced from radio observations =50 GHz is harder than that deduced from 70-250 keV X-ray data, meaning that there must exist a breaking energy around a few hundred keV. During the decay of the impulsive phase, a hardening of the X-ray spectrum is observed which is interpreted as a hardening of the electron distribution spectrum produced by the diffusion due to Coulomb collisions of the trapped electrons in a medium with an electron density of ne ∼ 3-5 × 1010 cm-3. © 2009 ESO. Fil: Gimenez de Castro, Carlos Guillermo. Universidad Presbiteriana Mackenzie. Centro de Radiotronomia y Astrofisica; Brasil Fil: Trottet, G.. Observatorio de Paris; Francia Fil: Silva Valio, Adriana. Universidad Presbiteriana Mackenzie. Centro de Radiotronomia y Astrofisica; Brasil Fil: Krucker, Sam. University of California; Estados Unidos Fil: Costa, Joaquim. Instituto Nacional de Pesquisas Espaciais; Brasil Fil: Kaufmann, Pierre. Universidade Estadual de Campinas; Brasil Fil: Correia, Emilia. Universidad Presbiteriana Mackenzie; Brasil Fil: Levato, Orlando Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina |
description |
The GOES X1.5 class flare that occurred on August 30, 2002 at 1327:30 UT is one of the few events detected so far at submillimeter wavelengths. We present a detailed analysis of this flare combining radio observations from 1.5 to 212 GHz (an upper limit of the flux is also provided at 405 GHz) and X-ray. Although the observations of radio emission up to 212 GHz indicates that relativistic electrons with energies of a few MeV were accelerated, no significant hard X-ray emission was detected by RHESSI above ∼250 keV. Images at 12-20 and 50-100 keV reveal a very compact, but resolved, source of about ∼10" ×10". EUV TRACE images show a multi-kernel structure suggesting a complex (multipolar) magnetic topology. During the peak time the radio spectrum shows an extended flatness from ∼7 to 35 GHz. Modeling the optically thin part of the radio spectrum as gyrosynchrotron emission we obtained the electron spectrum (spectral index d, instantaneous number of emitting electrons). It is shown that in order to keep the expected X-ray emission from the same emitting electrons below the RHESSI background at 250 keV, a magnetic field above 500 G is necessary. On the other hand, the electron spectrum deduced from radio observations =50 GHz is harder than that deduced from 70-250 keV X-ray data, meaning that there must exist a breaking energy around a few hundred keV. During the decay of the impulsive phase, a hardening of the X-ray spectrum is observed which is interpreted as a hardening of the electron distribution spectrum produced by the diffusion due to Coulomb collisions of the trapped electrons in a medium with an electron density of ne ∼ 3-5 × 1010 cm-3. © 2009 ESO. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-11 |
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/11336/171583 Gimenez de Castro, Carlos Guillermo; Trottet, G.; Silva Valio, Adriana; Krucker, Sam; Costa, Joaquim; et al.; Submillimeter and X-ray observations of an X class flare; EDP Sciences; Astronomy and Astrophysics; 507; 1; 11-2009; 433-439 0004-6361 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/171583 |
identifier_str_mv |
Gimenez de Castro, Carlos Guillermo; Trottet, G.; Silva Valio, Adriana; Krucker, Sam; Costa, Joaquim; et al.; Submillimeter and X-ray observations of an X class flare; EDP Sciences; Astronomy and Astrophysics; 507; 1; 11-2009; 433-439 0004-6361 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/200912028 info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2009/43/aa12028-09/aa12028-09.html info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/0908.2339v1 |
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 application/pdf |
dc.publisher.none.fl_str_mv |
EDP Sciences |
publisher.none.fl_str_mv |
EDP Sciences |
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 |
_version_ |
1844614155119624192 |
score |
13.070432 |