Rapid Submillimeter Brightenings Associated with a Large Solar Flare

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We present high time resolution observations of Active Region 8910 obtained simultaneously at 212 and 405 GHz during a large Hα flare, which produced a soft X-ray class X1.1 event. Data were obtained with the new solar submillimeter telescope recently installed at the El Leoncito Observatory to expl...

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Autores principales:	Kaufmann, Pierre, Raulin, J. P, Correia, E., Costa, J. E. R., Giménez de Castro, C. G., Silva, A. V. R., Levato, Orlando Hugo, Rovira, Marta Graciela, Mandrini, Cristina Hemilse, Fernández Borda, R., Bauer, O. H.
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2001
Materias:	Astronomía Sun: flares Sun: radio radiation
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/101568 https://ri.conicet.gov.ar/11336/22473 http://iopscience.iop.org/article/10.1086/318932
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-101568
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Astronomía Sun: flares Sun: radio radiation
spellingShingle	Astronomía Sun: flares Sun: radio radiation Kaufmann, Pierre Raulin, J. P Correia, E. Costa, J. E. R. Giménez de Castro, C. G. Silva, A. V. R. Levato, Orlando Hugo Rovira, Marta Graciela Mandrini, Cristina Hemilse Fernández Borda, R. Bauer, O. H. Rapid Submillimeter Brightenings Associated with a Large Solar Flare
topic_facet	Astronomía Sun: flares Sun: radio radiation
description	We present high time resolution observations of Active Region 8910 obtained simultaneously at 212 and 405 GHz during a large Hα flare, which produced a soft X-ray class X1.1 event. Data were obtained with the new solar submillimeter telescope recently installed at the El Leoncito Observatory to explore this poorly known part of the solar emission spectrum. A small slow submillimeter enhancement (≤300 sfu) was associated to bulk emissions at X-rays, Hα, and microwaves. The event exhibited numerous submillimeter-wave 100-300 ms duration spikes, the larger ones with fluxes on the order of 220 and 500 sfu (±20%) at 212 and 405 GHz, respectively. A dramatic increase in the incidence rate of submillimeter spikes sets in as a new large loop system appears in AR 8910, and X-ray emission increases nearly 1 hr before the large flare. The brightening incidence rate (~20 per minute) correlates well with the large flare light curves at X-rays and Hα. The submillimeter spikes may be associated to microflares, waves, or quakes in flaring active regions.
format	Articulo Articulo
author	Kaufmann, Pierre Raulin, J. P Correia, E. Costa, J. E. R. Giménez de Castro, C. G. Silva, A. V. R. Levato, Orlando Hugo Rovira, Marta Graciela Mandrini, Cristina Hemilse Fernández Borda, R. Bauer, O. H.
author_facet	Kaufmann, Pierre Raulin, J. P Correia, E. Costa, J. E. R. Giménez de Castro, C. G. Silva, A. V. R. Levato, Orlando Hugo Rovira, Marta Graciela Mandrini, Cristina Hemilse Fernández Borda, R. Bauer, O. H.
author_sort	Kaufmann, Pierre
title	Rapid Submillimeter Brightenings Associated with a Large Solar Flare
title_short	Rapid Submillimeter Brightenings Associated with a Large Solar Flare
title_full	Rapid Submillimeter Brightenings Associated with a Large Solar Flare
title_fullStr	Rapid Submillimeter Brightenings Associated with a Large Solar Flare
title_full_unstemmed	Rapid Submillimeter Brightenings Associated with a Large Solar Flare
title_sort	rapid submillimeter brightenings associated with a large solar flare
publishDate	2001
url	http://sedici.unlp.edu.ar/handle/10915/101568 https://ri.conicet.gov.ar/11336/22473 http://iopscience.iop.org/article/10.1086/318932
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Rapid Submillimeter Brightenings Associated with a Large Solar Flare

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