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Astrophysics > Solar and Stellar Astrophysics

arXiv:1307.6965 (astro-ph)
[Submitted on 26 Jul 2013 (v1), last revised 10 Oct 2013 (this version, v2)]

Title:Microwave Negative Bursts as Indications of Reconnection between Eruptive Filaments and Large-Scale Coronal Magnetic Environment

Authors:V. Grechnev (1), I. Kuzmenko (2), A. Uralov (1), I. Chertok (3), A. Kochanov (1) ((1) Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russia (2) Ussuriysk Astrophysical Observatory, Gornotaezhnoe, Russia (3) Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN), Moscow, Russia)
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Abstract:Low-temperature plasma ejected in solar eruptions can screen active regions as well as quiet solar areas. Absorption phenomena can be observed in microwaves as 'negative bursts' and in different spectral domains. We analyze two very different recent events with such phenomena and present an updated systematic view of solar events associated with negative bursts. Related filament eruptions can be normal, without essential changes of shape and magnetic configuration, and 'anomalous'. The latter are characterized by disintegration of an eruptive filament and dispersal of its remnants as a cloud over a large part of solar disk. Such phenomena can be observed as giant depressions in the He II 304 A line. One of possible scenarios for an anomalous eruption is proposed in terms of reconnection of filament's internal magnetic fields with external large-scale coronal surrounding.
Comments: 11 pages, 8 figures, 1 table. Accepted for publication in PASJ
Subjects: Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:1307.6965 [astro-ph.SR]
  (or arXiv:1307.6965v2 [astro-ph.SR] for this version)
  https://doi.org/10.48550/arXiv.1307.6965
Related DOI: https://doi.org/10.1093/pasj/65.sp1.S10

Submission history

From: Victor Grechnev [view email]
[v1] Fri, 26 Jul 2013 09:12:00 UTC (3,990 KB)
[v2] Thu, 10 Oct 2013 04:17:45 UTC (4,011 KB)
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