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浏览/检索结果: 共3条，第1-3条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序作者升序作者降序提交时间升序提交时间降序题名升序题名降序 Timing analysis of Swift J1658.2-4242's outburst in 2018 with Insight-HXMT, NICER and AstroSat 期刊论文 Journal of High Energy Astrophysics, 2019, 卷号: 24, 页码: 30-40 作者:  HXMT 收藏  |  浏览/下载：46/0  |  提交时间：2022/02/08 Accretion  accretion disks  Black hole physics  X-rays: binaries:  Swift J1658.2-4242  Astrophysics - High Energy Astrophysical Phenomena  Abstract: We present the observational results from a detailed timing analysis of the black hole candidate Swift J1658.2-4242 during its 2018 outburst with the observations of Hard X-ray Modulation Telescope (Insight-HXMT), Neutron Star Interior Composition Explorer (NICER) and AstroSat in 0.1-250 keV. The evolution of intensity, hardness and integrated fractional root mean square (rms) observed by Insight-HXMT and NICER are presented in this paper. Type-C quasi-periodic oscillations (QPOs) observed by NICER (0.8-3.5 Hz) and Insight-HXMT (1-1.6 Hz) are also reported in this work. The features of the QPOs are analyzed with an energy range of 0.5-50 keV. The relations between QPO frequency and other characteristics such as intensity, hardness and QPO rms are carefully studied. The timing and spectral properties indicate that Swift J1658.2-4242 is a black hole binary system. Besides, the rms spectra of the source calculated from the simultaneous observation of Insight-HXMT, NICER and AstroSat support the Lense-Thirring origin of the QPOs. The relation between QPO phase lag and the centroid frequency of Swift J1658.2-4242 reveals a near zero constant when < 4Hz and a soft phase lag at 6.68 Hz. This independence follows the same trend as the high inclination galactic black hole binaries such as MAXI J1659-152.   Characteristics of multichannel discharge in a coaxial field-distortion switch under nanosecond voltage pulses 期刊论文 Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams, 2010, 卷号: 22, 期号: 3, 页码: 484-488 作者:  Chang, Jiasen;  Wang, Hu;  Zhang, Qiaogen 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/18 Average numbers  Channel resistance  Discharge characteristics  Discharge phenomena  Electrode erosion  Formative delay  Gas spark switches  Gas switch  Mixture ratio  Multi-channel  Pulse voltage  Relation between the characteristics  Rising rate  Switch inductance  Voltage pulse   Experimental researches on the one-dimensional photonic crystal microcavity (EI CONFERENCE) 会议论文 ICO20: Materials and Nanostructures, August 21, 2005 - August 26, 2005, Changchun, China He X.; Liu X.; Xie D.; Yu H.; Tong C.; Feng J. 收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25 In experiments  the energy band structures of one-dimensional photonic crystal (1-D PC) is researched. We get the relation between the band gap width and the number of the layers  the dielectric indices contrast  the center wavelength. The microcavity of 1-D PC is made. We study the reflection and transmission characteristics of the microcavity. Experimental results indicate the microcavity of 1-D PC can get a high reflection coefficient and a good stability and substantiality of the membrane layers in air.