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浏览/检索结果: 共92条，第1-10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 Properties of pulsar subpulse drifting in different profile components 期刊论文  OAI收割 JOURNAL OF ASTROPHYSICS AND ASTRONOMY, 2022, 卷号: 43, 期号: 1, 页码: 14 作者:  Tu, Z. Y.;  Yuen, R.;  Han, X. H.   |  收藏  |  浏览/下载：46/0  |  提交时间：2022/07/28 Radiation mechanisms: nonthermal  pulsar: general   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：28/0  |  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.   Exploring the Origin of Multiwavelength Activities of High-redshift Flat-spectrum Radio Quasar PKS 1502+106 during 2014-2018 期刊论文  OAI收割 ASTROPHYSICAL JOURNAL, 2019, 卷号: 881, 期号: 2, 页码: 17 作者:  Ding, N.;  Gu, Q. S.;  Geng, X. F.;  Xiong DR(熊定荣);  Xue, R.   |  收藏  |  浏览/下载：73/0  |  提交时间：2019/09/23 galaxies: active  galaxies: jets  quasars: individual (PKS 1502+106)  radiation mechanisms: nonthermal   Polarization with a Three-dimensional Mixed Magnetic Field and Its Application to GRB 170817A 期刊论文  OAI收割 ASTROPHYSICAL JOURNAL, 2019, 卷号: 870, 期号: 2, 页码: 10 作者:  Lan, Mi-Xiang;  Geng, Jin-Jun;  Wu, Xue-Feng;  Dai, Zi-Gao   |  收藏  |  浏览/下载：75/0  |  提交时间：2019/04/08 gamma-ray burst: general  magnetic fields  polarization  radiation mechanisms: nonthermal  shock waves   Statistical Analysis on XMM-Newton X-Ray Flares of Mrk 421: Distributions of Peak Flux and Flaring Time Duration 期刊论文  OAI收割 ASTROPHYSICAL JOURNAL, 2018, 卷号: 864, 期号: 2, 页码: 16 作者:  Yan, Dahai;  Yang, Shenbang;  Zhang, Pengfei;  Dai, Benzhong;  Wang, Jiancheng   |  收藏  |  浏览/下载：40/0  |  提交时间：2019/04/08 galaxies: jets  gamma rays: galaxies  radiation mechanisms: nonthermal   Statistical Analysis on XMM-Newton X-Ray Flares of Mrk 421: Distributions of Peak Flux and Flaring Time Duration 期刊论文  OAI收割 ASTROPHYSICAL JOURNAL, 2018, 卷号: 864, 期号: 2, 页码: 16 作者:  Yan DH(闫大海);  Yang, Shenbang;  Zhang, Pengfei;  Dai, Benzhong;  Wang JC(王建成)   |  收藏  |  浏览/下载：39/0  |  提交时间：2018/11/27 galaxies: jets  gamma rays: galaxies  radiation mechanisms: nonthermal   A New Measurement of the Spectral Lag of Gamma-Ray Bursts and its Implications for Spectral Evolution Behaviors 期刊论文  OAI收割 ASTROPHYSICAL JOURNAL, 2017, 卷号: 844, 期号: 2, 页码: 14 作者:  Shao, Lang;  Zhang, Bin-Bin;  Wang, Fu-Ri;  Wu, Xue-Feng;  Cheng, Ye-Hao   |  收藏  |  浏览/下载：76/0  |  提交时间：2019/04/08 gamma-ray burst: general  methods: data analysis  radiation mechanisms: nonthermal  Supporting material: figure set, machine-readable table   A New Measurement of the Spectral Lag of Gamma-Ray Bursts and its Implications for Spectral Evolution Behaviors 期刊论文  OAI收割 ASTROPHYSICAL JOURNAL, 2017, 卷号: 844, 期号: 2 作者:  Feng, Huan-Xue;  Zhang, Meng;  Xu, Dong;  Wang, Xue;  Xi, Bao-Jia   |  收藏  |  浏览/下载：74/0  |  提交时间：2017/12/06 Gamma-ray Burst: General  Methods: Data Analysis  Radiation Mechanisms: Nonthermal  Supporting Material: Figure Set  Machine-readable Table   On the Origin of the Hard X-Ray Excess of High-Synchrotron-Peaked BL Lac Object Mrk 421 期刊论文  OAI收割 ASTROPHYSICAL JOURNAL, 2017, 卷号: 842, 期号: 2 作者:  Chen, Liang   |  收藏  |  浏览/下载：23/0  |  提交时间：2017/08/29 Bl Lacertae Objects: Individual (Mrk 421)  Galaxies: Active  Galaxies: Jets  Radiation Mechanisms: Nonthermal  X-rays: Galaxies   HESS J1427-608: AN UNUSUAL HARD, UNBROKEN gamma-RAY SPECTRUM IN A VERY WIDE ENERGY RANGE 期刊论文  OAI收割 ASTROPHYSICAL JOURNAL, 2017, 卷号: 835, 期号: 1, 页码: 7 作者:  Guo, Xiao-Lei;  Xin, Yu-Liang;  Liao, Neng-Hui;  Yuan, Qiang;  Gao, Wei-Hong   |  收藏  |  浏览/下载：30/0  |  提交时间：2019/04/08 gamma rays: general  gamma rays: ISM  ISM: individual objects (HESS J1427-608)  ISM: supernova remnants  radiation mechanisms: nonthermal