On the origin of microwave zebra pattern

Altyntsev, A. T.; Kuznetsov, A. A.; Meshalkina, N. S.; Rudenko, G. V.; Yan, Yihua

doi:10.1051/0004-6361:20048337

Cited by 46 publications

(59 citation statements)

References 36 publications

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“…The existing models of the zebra pattern explain the observed spectra as a consequence of physical processes in the radio source (specific emission mechanism, eigen-modes of resonator-like source) and can be basically divided into the three following classes: 1) models based on the double plasma resonance (DPR) and subsequent transformation of generated plasma (upper-hybrid in fact) waves into the electromagnetic mode (Zheleznyakov & Zlotnik 1975;Zlotnik et al 2003;Ledenev et al 2001), 2) models involving the non-linear coupling of Bernstein modes (Altyntsev et al 2005, and references therein), and 3) the model based on the eigen-modes of plasma waves trapped in a resonator-like structure formed by local plasma inhomogeneity (LaBelle et al 2003).…”

Section: The Zebra Patternmentioning

confidence: 99%

Interference patterns in solar radio spectra: high-resolution structural analysis of the corona

Bárta

Karlický

2006

A&A

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Aims. We present a new method for high-resolution structural analysis of the solar corona. Methods. The relationship between the spectral features of various types of solar radio bursts and the physical properties of their sources have been extensively studied by many authors. On the other hand, it is plausible to accept that the spectral properties of the solar radio radiation received on the Earth are -besides the physics of the radio source -influenced by an inter-laying medium that radio waves propagate through. In particular, the regular structures in the solar corona -such as coronal waves, oscillations in shock fronts, the fine structures of coronal loops, streamer current sheets, etc. -might efficiently filter transferred radio radiation just as (broad-band) X-rays are filtered by a periodic atomic structure of crystals; the difference is only in the spatial scale. Using the wave optics methods, we investigate the prospective influence of considered coronal structures on the propagating radio waves originating in an external remote source. Results. Preliminary results have shown that the resulting modelled radio emission may recall the spectra of observed zebra patterns for the simple 1D density structure considered here and for a reasonable set of parameters. Conversely, it is suggested that the spectra of the zebra patterns might be used for an analysis of those coronal structures that made these traces on the radiation by methods similar to those used in crystallography. The possibility of the presence of such regular small scale structures in the solar corona is demonstrated. For completeness, a brief review of contemporary models of the zebra patterns is provided.

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Section: The Zebra Patternmentioning

confidence: 99%

Interference patterns in solar radio spectra: high-resolution structural analysis of the corona

Bárta

Karlický

2006

A&A

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“…They include the classical narrowband spike clusters (Benz 1986;Fleishman & Melnikov 1998), supershort structures (SSSs; Magdalenić et al 2006), and some types of spiky zebra bursts (Altyntsev et al 2005;Chernov 2006). It is currently unclear whether they represent versions of basically the same or different physical phenomena.…”

Section: Introductionmentioning

confidence: 99%

Spike Decomposition Technique: Modeling and Performance Tests

Nita

Fleishman

Gary

2008

Astrophysical Journal

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We develop an automated technique for fitting the spectral components of solar microwave spike bursts, which are characterized by narrowband spectral features. The algorithm is especially useful for periods when the spikes occur in densely packed clusters, where the algorithm is capable of decomposing overlapping spike structures into individual spectral components. To test the performance and applicability limits of this data reduction tool, we perform comprehensive modeling of spike clusters characterized by various typical bandwidths, spike densities, and amplitude distributions. We find that, for a wide range of favorable combinations of input parameters, the algorithm is able to recover the characteristic features of the modeled distributions within reasonable confidence intervals. Having model-tested the algorithm against spike overlap, broadband spectral background, noise contamination, and possible malfunction of some spectral channels, we apply the technique to a spike cluster recorded by the Chinese Purple Mountain Observatory (PMO) spectrometer, operating above 4.5 GHz. We study the variation of the spike distribution parameters, such as amplitude, bandwidth, and related derived physical parameters, as a function of time. The method can be further applied to observations from other instruments and to other types of fine structures.

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“…2) âÓÍÑÔÕÐÂâ ÕÇÏÒÇÓÂÕÖÓÂ ËÊÎÖÚÇÐËâ T b AEÑÔÕËÅÂÇÕ ÄÞÔÑÍËØ ÊÐÂÚÇÐËÌ, AEÑ 10 9 ¬ [22]; 3) ÍÑÎËÚÇÔÕÄÑ ÒÑÎÑÔ ÏÇÐâÇÕÔâ ÑÕ ÐÇÔÍÑÎßÍËØ ÇAEËÐËÙ AEÑ ÐÇÔÍÑÎßÍËØ AEÇÔâÕÍÑÄ Ä ÓÂÊÐÞØ ÄÔÒÎÇÔÍÂØ [7,8,14,16, 18,22]; 4) ÓÂÔÔÕÑâÐËÇ ÏÇÉAEÖ ÒÑÎÑÔÂÏË ÔÕÓÖÍÕÖÓÞ ÑÃÞÚÐÑ ÏÐÑÅÑ ÏÇÐßÛÇ ÚÂÔÕÑÕÞ ÓÂAEËÑËÊÎÖÚÇÐËâ [7, 13, 21 ë 25, 27]; 5) ÓÂÔÔÕÑâÐËÇ ÏÇÉAEÖ ÒÑÎÑÔÂÏË Ä ÃÑÎßÛËÐÔÕÄÇ ÔÎÖ-ÚÂÇÄ ÖÄÇÎËÚËÄÂÇÕÔâ Ô ÓÑÔÕÑÏ ÚÂÔÕÑÕÞ [7,12,13,22] [7, 18,20,28,34].…”

Section: ¿××çíõ Aeäñìðñåñ òîâêïçððñåñ óçêñðâðôâ (¥±²) ä ïâåðëõñâíõëäðunclassified

Double plasma resonance аnd its manifestations in radio astronomy

Железняков¹,

Злотник²,

Зайцев³

et al. 2016

Usp. Fiz. Nauk

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¿××ÇÍÕ AEÄÑÌÐÑÅÑ ÒÎÂÊÏÇÐÐÑÅÑ ÓÇÊÑÐÂÐÔÂ (¥±²) Ä ÏÂÅÐËÕÑÂÍÕËÄÐÑÌ ÒÎÂÊÏÇ³ÑÅÎÂÔÐÑ(k k ì ÍÑÏÒÑÐÇÐÕÂ k, ÒÂÓÂÎÎÇÎßÐÂâ ÒÑÎá B). ªÐÕÇÓÄÂÎ ÖÅÎÑÄ a AEÎâ ÔÎÂÃÑ ÊÂÕÖØÂáÜËØ ÒÓÑAEÑÎßÐÞØ ÄÑÎÐ ÏÑÉÇÕ ÃÞÕß ÑÒÓÇAEÇÎÈÐ ÒÖÕÈÏ ÑÃÝÇAEËÐÇÐËâ ÐÇÓÂÄÇÐÔÕÄÂ (9) Ô ÓÇÛÇÐËâÏË AEËÔÒÇÓÔËÑÐÐÑÅÑ ÖÓÂÄÐÇÐËâ (11), (12). ªÊ ÓÇÊÖÎßÕÂÕÂ ÔÎÇAEÖÇÕ, ÚÕÑ AEÎâ ÎáÃÞØ ÄÇÎËÚËÐ l ÖÔÎÑÄËÇ (9) ÖAEÑÄÎÇÕÄÑÓâÇÕÔâ Ä ÖÊÍÑÏ ËÐÕÇÓÄÂÎÇ, ÅAEÇ cos 2 a 5 1. ¦ÔÎË l k . 1) ÄÓÇÏâ ÉËÊÐË ©³ Ä ÓÂÊÐÞØ ÄÔÒÎÇÔÍÂØ ÏÇÐâÇÕÔâ ÑÕ ÐÇÔÍÑÎßÍËØ ÔÇÍÖÐAE AEÑ ÐÇÔÍÑÎßÍËØ AEÇÔâÕÍÑÄ ÏËÐÖÕ [7,8,13,22];2) âÓÍÑÔÕÐÂâ ÕÇÏÒÇÓÂÕÖÓÂ ËÊÎÖÚÇÐËâ T b AEÑÔÕËÅÂÇÕ ÄÞÔÑÍËØ ÊÐÂÚÇÐËÌ, AEÑ 10 9 ¬ [22]; 3) ÍÑÎËÚÇÔÕÄÑ ÒÑÎÑÔ ÏÇÐâÇÕÔâ ÑÕ ÐÇÔÍÑÎßÍËØ ÇAEËÐËÙ AEÑ ÐÇÔÍÑÎßÍËØ AEÇÔâÕÍÑÄ Ä ÓÂÊÐÞØ ÄÔÒÎÇÔÍÂØ [7,8,14,16, 18,22]; 4) ÓÂÔÔÕÑâÐËÇ ÏÇÉAEÖ ÒÑÎÑÔÂÏË ÔÕÓÖÍÕÖÓÞ ÑÃÞÚÐÑ ÏÐÑÅÑ ÏÇÐßÛÇ ÚÂÔÕÑÕÞ ÓÂAEËÑËÊÎÖÚÇÐËâ [7, 13, 21 ë 25, 27]; 5) ÓÂÔÔÕÑâÐËÇ ÏÇÉAEÖ ÒÑÎÑÔÂÏË Ä ÃÑÎßÛËÐÔÕÄÇ ÔÎÖ-ÚÂÇÄ ÖÄÇÎËÚËÄÂÇÕÔâ Ô ÓÑÔÕÑÏ ÚÂÔÕÑÕÞ [7,12,13,22] [7, 18,20,28,34].³ÓÇAEË ÐÂÃÎáAEÇÐËÌ ©³ ÑÔÑÃÑÇ ÊÐÂÚÇÐËÇ ËÏÇáÕ ÓÇ-ÊÖÎßÕÂÕÞ ÐÂÃÎáAEÇÐËÌ ¹ÇÐÂ Ë AEÓ. [7, 18,20,28,32,34] ÐÂ AEÎËÐÇ ÄÑÎÐÞ l 3 ÔÏ ( f 10 ¤¤Ù) AEÎâ ÐÂÃÎáAEÂÇÏÞØ ÒÑÕÑÍÑÄ F $ 100 ÁÐ Ë ÓÂÔÔÕÑâÐËÌ R % 2 ÍÒÍ. ±ÓË ÕÓÂÐÔ×ÑÓÏÂÙËË ÄÑÊÃÖÉAEÂÇÏÞØ ÒÎÂÊÏÇÐÐÞØ ÄÑÎÐ Ä àÎÇÍÕÓÑÏÂÅÐËÕÐÞÇ ÊÂ ÔÚÈÕ ÓàÎÇÇÄÔÍÑÅÑ ÓÂÔÔÇâÐËâ ÐÂ ÚÂÔÕËÙÂØ ÓÂÄÐÑÄÇÔÐÑÌ ÒÎÂÊÏÞ ÄÞÒÑÎÐâÇÕÔâ ÊÂÍÑÐ ÔÑØÓÂ-ÐÇÐËâ àÐÇÓÅËËªÊ ×ÑÓÏÖÎ (56), (57) ÑÒÓÇAEÇÎâÇÕÔâ ÑÃÎÂÔÕß ÐÇÎËÐÇÌÐÑÅÑ ÄÊÂËÏÑAEÇÌÔÕÄËâ àÎÇÍÕÓÑÏÂÅÐËÕÐÑÌ ÄÑÎÐÞ ÚÂÔÕÑÕÑÌ o t Ô ÄÑÊÃÖÉAEÂÇÏÞÏ ÔÒÇÍÕÓÑÏ ÒÎÂÊÏÇÐÐÞØ ÄÑÎÐ: The double plasma resonance effect is a phenomenon in which plasma waves in a magnetized plasma show a sharp increase in instability when the upper hybrid frequency coincides with a cyclotron harmonic frequency. A radiation mechanism associated with this effect provides an explanation of the origin of the "zebra pattern" in radio spectra of the Sun, Jupiter and the Crab pulsar. The diversity of these astronomical objects and the successful interpretation of their spectra in terms of the double plasma resonance effect point to the universal nature of this phenomenon and suggest that one and the same radiation mechanism may operate under a variety of astronomical conditions.

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On the origin of microwave zebra pattern

Cited by 46 publications

References 36 publications

Interference patterns in solar radio spectra: high-resolution structural analysis of the corona

Interference patterns in solar radio spectra: high-resolution structural analysis of the corona

Spike Decomposition Technique: Modeling and Performance Tests

Double plasma resonance аnd its manifestations in radio astronomy

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