标题： 太阳耀斑的能量和光谱分析来自无线电和X射线观测 显示英文标题

标题： Energy and spectral analysis of confined solar flares from radio and X-ray observations

摘要： 能量和射电爆发的能谱形状可能有助于我们理解太阳爆发的生成机制，包括太阳耀斑、日冕物质抛射、喷发丝状体以及各种尺度的喷流。 不同类型的耀斑可能具有不同的能量和能谱分布特征。 在本研究中，我们选取了2014年10月期间的10个主要受限耀斑事件，利用从微波到星际射电波的射电观测数据，以及GOES、RHESSI和Fermi/GBM的X射线观测数据，研究它们的整体能谱行为以及微波辐射的能量。 我们发现：所有受限耀斑事件都与延伸至9.4 - 15.4 GHz频率的微波连续谱爆发有关，所有受限耀斑事件的峰值频率高于4.995 GHz且低于或等于17 GHz。 中位数约为9 GHz。 微波爆发能量（或通量）以及峰值频率被发现可以作为估计太阳耀斑功率的有用标准。 观测结果表明，受限耀斑中的磁场强度可能比Nita等人在2004年研究的412个耀斑中的磁场更强。 所有研究的10个事件都没有产生可检测的高于300 keV能量的硬X射线，这表明在受限耀斑中缺乏将电子有效加速到高能的机制。 显示英文摘要

摘要： The energy and spectral shape of radio bursts may help us understand the generation mechanism of solar eruptions, including solar flares, CMEs, eruptive filaments, and various scales of jets. The different kinds of flares may have different characteristics of energy and spectral distribution. In this work, we selected 10 mostly confined flare events during October 2014 to investigate their overall spectral behavior and the energy emitted in microwaves by using radio observations from microwaves to interplanetary radio waves, and X-ray observations of GOES, RHESSI, and Fermi/GBM. We found that: All the confined flare events were associated with a microwave continuum burst extending to frequencies of 9.4 - 15.4 GHz, and the peak frequencies of all confined flare events are higher than 4.995 GHz and lower than or equal to 17 GHz. The median value is around 9 GHz. The microwave burst energy (or fluence) as well as the peak frequency are found to provide useful criteria to estimate the power of solar flares. The observations imply that the magnetic field in confined flares tends to be stronger than that in 412 flares studied by Nita et al. 2004. All 10 events studied did not produce detectable hard X-rays with energies above 300 keV indicating the lack of efficient acceleration of electrons to high energies in the confined flares.