机构

• 紫金山天文台 [4]
• 高能物理研究所 [1]

采集方式

• OAI收割 [5]

内容类型

• 期刊论文 [5]

发表日期

• 2021 [1]
• 2009 [1]
• 2005 [1]
• 2004 [1]
• 1997 [1]

学科主题

• Astronomy ... [4]

筛选

浏览/检索结果: 共5条，第1-5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.   Double hard X-ray peaks in RHESSI flares as evidence of chromospheric evaporation and implications for modifying the Neupert effect 期刊论文  OAI收割 RESEARCH IN ASTRONOMY AND ASTROPHYSICS  , 2009, 卷号: 9, 期号: 10, 页码: 1155-1164 Li You-Ping; Gan Wei-Qun; Su Yang 收藏  |  浏览/下载：16/0  |  提交时间：2011/12/08 SOLAR-FLARES  NONTHERMAL ELECTRONS  IMPULSIVE PHASE  TOTAL-ENERGY  LOOP  DISTRIBUTIONS  ENERGETICS  SPECTRA  EVENTS  MODEL   Energetic electrons in loop top and footpoint microwave sources 期刊论文  OAI收割 SOLAR PHYSICS, 2005, 卷号: 226, 期号: 2, 页码: 327-336 作者:  Zhou, AH;  Su, YN;  Huang, GL 收藏  |  浏览/下载：22/0  |  提交时间：2012/03/07 HARD X-RAY  SOLAR-FLARES  FLARING LOOP  GYROSYNCHROTRON RADIATION  IMPULSIVE PHASE  EMISSION  BURSTS  FIELD  CONFIGURATION  POLARIZATION   Unusual spectral absorption observed in the 16 August 1989 limb flare 期刊论文  OAI收割 SOLAR PHYSICS, 2004, 卷号: 223, 期号: 1, 页码: 169-180 作者:  You, JQ;  Li, H;  Hiei, E 收藏  |  浏览/下载：16/0  |  提交时间：2012/12/22 SOLAR LIMB  IMPULSIVE PHASE  LINE   A statistical study of the resonance line of Ca XIX observed with Yohkoh Bragg crystal spectrometer 期刊论文  OAI收割 SOLAR PHYSICS, 1997, 卷号: 174, 期号: 40910, 页码: 403—412 Gan, WQ; Watanabe, T 收藏  |  浏览/下载：23/0  |  提交时间：2013/02/05 SOLAR-FLARE  IMPULSIVE PHASE  CORONAL LOOP  DIAGNOSTICS  PLASMA  ATMOSPHERES  EMISSION  MODELS