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首页> 外文期刊>Astronomy letters >Unusual stripes in emission and absorption in solar radio bursts: Ropes of fibers in the meter wave band
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Unusual stripes in emission and absorption in solar radio bursts: Ropes of fibers in the meter wave band

机译：太阳无线电脉冲中发射和吸收中的异常条纹：米波段中的纤维绳

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摘要

Based on data from the spectrographs of IZMIRAN and Tremsdorf station (Astronomical Institute, Potsdam), we analyze the ropes of narrow-band fibers in the spectra of solar radio bursts in the meter wave band by invoking events of satellite data (SOHO/LASCO, EIT, MDI) for the analysis. We consider in detail basic properties of the ropes in four events in comparison with previously known data. The fibers in ropes are more commonly observed with an overlap in time and frequency, but occasionally (more often at the end of the ropes) they can follow with a separation in time. The fiber duration and recurrence period seldom remain stable and, in general, increase from 0.3-0.5 s at the beginning to several seconds at the end of the rope. The relative values of the instantaneous and total fiber frequency bandwidths change only slightly in different events; delta f/f approximate to 0.003-0.005 and Delta f/f approximate to 0.02-0.03. Most of the ropes exhibit a low-frequency absorption. The fibers in ropes are similar to ordinary intermediate drift bursts (fiber bursts), but they drift in a narrow frequency band and have a more frequent recurrence in some events. The ropes of fibers are usually observed in the time interval when the shock front catches up with the leading edge of a coronal mass ejection. Under the condition of a unified approach to interpreting the ropes of fibers in all events, their basic properties can be explained in terms of the model of fiber bursts. The connection of fibers with the developed zebra pattern is shown within the framework of a unified approach to the formation theory of stripes in emission and absorption in the model on whistlers.
机译：根据IZMIRAN和Tremsdorf站（波茨坦天文研究所）的光谱数据，我们通过调用卫星数据事件（SOHO / LASCO， EIT，MDI）进行分析。与先前已知的数据相比，我们详细考虑了四个事件中绳索的基本特性。通常观察到绳索中的纤维在时间和频率上有重叠，但是偶尔（通常在绳索的末端）它们可以随时间间隔而跟随。纤维持续时间和重复周期很少保持稳定，通常从绳索开始时的0.3-0.5 s增加到绳索末端的几秒。瞬时和总光纤频率带宽的相对值在不同事件中仅略有变化。 Δf / f大约为0.003-0.005，而Δf / f大约为0.02-0.03。大多数绳索表现出低频吸收。绳索中的纤维类似于普通的中间漂移爆发（纤维爆发），但它们会在狭窄的频带中漂移，并且在某些情况下会更频繁地发生。通常在冲击前锋赶上日冕物质抛射的前缘的时间间隔内观察到纤维绳。在所有情况下都采用统一的方法来解释纤维绳的情况下，可以根据纤维破裂的模型来解释其基本特性。在统一的方法框架中显示了纤维与发达的斑马图案的连接，该模型是在吹口哨模型中对发射和吸收中的条纹形成理论的统一方法。

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