Rapid submillimeter brightenings associated with a large solar flare

We present high time resolution observations of Active Region 8910 obtained simultaneously at 212 and 405 GHz during a large Ha 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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2001
Materias:
Sun: flares
Sun: radio radiation
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v548_n1PART2_pL95_Kaufmann
http://hdl.handle.net/20.500.12110/paper_0004637X_v548_n1PART2_pL95_Kaufmann
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0004637X_v548_n1PART2_pL95_Kaufmann
record_format dspace
spelling paper:paper_0004637X_v548_n1PART2_pL95_Kaufmann2023-06-08T14:28:43Z Rapid submillimeter brightenings associated with a large solar flare Sun: flares Sun: radio radiation We present high time resolution observations of Active Region 8910 obtained simultaneously at 212 and 405 GHz during a large Ha 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. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v548_n1PART2_pL95_Kaufmann http://hdl.handle.net/20.500.12110/paper_0004637X_v548_n1PART2_pL95_Kaufmann
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Sun: flares
Sun: radio radiation
spellingShingle Sun: flares
Sun: radio radiation
Rapid submillimeter brightenings associated with a large solar flare
topic_facet 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 Ha 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.
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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v548_n1PART2_pL95_Kaufmann
http://hdl.handle.net/20.500.12110/paper_0004637X_v548_n1PART2_pL95_Kaufmann
_version_ 1768544802163392512

Ejemplares similares