机构

• 金属研究所 [1]
• 高能物理研究所 [1]
• 紫金山天文台 [1]

采集方式

• OAI收割 [3]

内容类型

• 期刊论文 [3]

发表日期

• 2021 [1]
• 2012 [1]
• 2009 [1]

学科主题

• Astronomy ... [1]

筛选

浏览/检索结果: 共3条，第1-3条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Detection of Flare Multiperiodic Pulsations in Mid-ultraviolet Balmer Continuum, Lyl Hard X-Ray, and Radio Emissions Simultaneously 期刊论文  OAI收割 The Astrophysical Journal, 2021, 卷号: 921, 页码: 179 作者:  HXMT   |  收藏  |  浏览/下载：25/0  |  提交时间：2022/02/08 Solar flares  Solar oscillations  Solar ultraviolet emission  Solar  x-ray emission  Solar radio emission  1496  1515  1533  1536  1522  Astrophysics - Solar and Stellar Astrophysics  Abstract: Quasi-periodic pulsations (QPPs), which usually appear as temporal pulsations of the total flux, are frequently detected in the light curves of solar/stellar flares. In this study, we present the investigation of nonstationary QPPs with multiple periods during the impulsive phase of a powerful flare on 2017 September 6, which were simultaneously measured by the Hard X-ray Modulation Telescope (Insight-HXMT), as well as the ground-based BLENSW. The multiple periods, detected by applying a wavelet transform and Lomb-Scargle periodogram to the detrended light curves, are found to be ~20-55 s in the Ly`and mid-ultraviolet Balmer continuum emissions during the flare impulsive phase. Similar QPPs with multiple periods are also found in the hard X-ray emission and low-frequency radio emission. Our observations suggest that the flare QPPs could be related to nonthermal electrons accelerated by the repeated energy release process, i.e., triggering of repetitive magnetic reconnection, while the multiple periods might be modulated by the sausage oscillation of hot plasma loops. For the multiperiodic pulsations, other generation mechanisms could not be completely ruled out.   Unusual Emissions at Various Energies Prior to the Impulsive Phase of the Large Solar Flare and Coronal Mass Ejection of 4 November 2003 期刊论文  OAI收割 SOLAR PHYSICS, 2012, 卷号: 279, 期号: 2, 页码: 465-475 作者:  Kaufmann, Pierre;  Holman, Gordon D.;  Su, Yang;  Guillermo Gimenez de Castro, C.;  Correia, Emilia 收藏  |  浏览/下载：25/0  |  提交时间：2013/01/31 Coronal mass ejections (CMEs)  CME precursors  Solar flares  Sub-THz emissions  X-ray emissions   Characterization and optical properties of ZnO nanoparticles obtained by oxidation of Zn nanoparticles 期刊论文  OAI收割 Materials Letters, 2009, 卷号: 63, 期号: 29, 页码: 2533-2535 Z. H. Wang; D. Y. Geng; Z. Han; Z. D. Zhang 收藏  |  浏览/下载：22/0  |  提交时间：2012/04/13 Semiconductors  Nanomaterials  Optical materials and properties  X-ray  techniques  Defects  zinc-oxide  growth  photoluminescence  ultraviolet  nanowires  nanotubes  emissions  layer