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Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文  OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者:  HXMT
  |  收藏  |  浏览/下载：24/0  |  提交时间：2022/02/08
Radio transient sources  Magnetars  Soft gamma-ray repeaters  2008  992  1471  Astrophysics - High Energy Astrophysical Phenomena  Astrophysics - Instrumentation and Methods for Astrophysics  Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of AJ = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 1014 Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to RNIR ? 0.025 (fluence index ?0.35).  
Screening and simulation of offshore CO2-EOR and storage: A case study for the HZ21-1 oilfield in the Pearl River Mouth Basin, Northern South China Sea 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, 2019, 卷号: 86, 页码: 66-81
作者:  Li, Pengchun;  Yi, Linzi;  Liu, Xueyan;  Hu, Gang;  Lu, Jiemin
  |  收藏  |  浏览/下载：33/0  |  提交时间：2020/10/29
Screening and simulation of offshore CO2-EOR and storage: A case study for the HZ21-1 oilfield in the Pearl River Mouth Basin, Northern South China Sea 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, 2019, 卷号: 86, 页码: 66, 81
作者:  Liu, Xueyan;  Hu, Gang;  Lu, Jiemin;  Zhou, Di;  Hovorka, Susan
  |  收藏  |  浏览/下载：73/0  |  提交时间：2019/09/09
Timing analysis of Swift J1658.2-4242's outburst in 2018 with Insight-HXMT, NICER and AstroSat 期刊论文  OAI收割
Journal of High Energy Astrophysics, 2019, 卷号: 24, 页码: 30-40
作者:  HXMT
  |  收藏  |  浏览/下载：57/0  |  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.  
Wavepacket dynamics of a Rydberg atom monitored by a pair of time-delayed laser pulses 期刊论文  OAI收割
Journal of Physics B: Atomic, Molecular and Optical Physics, 2018, 卷号: 51, 期号: 4
作者:  Wang,HanMu;  Xin,PeiPei;  Cheng,Hong;  Zhang,ShanShan;  Liu,HongPing
  |  收藏  |  浏览/下载：50/0  |  提交时间：2018/11/05
Nonsequential double ionization of helium in IR+XUV two-color laser fields II: collision-excitation ionization process 期刊论文  OAI收割
Journal of Physics B: Atomic, Molecular and Optical Physics, 2018, 卷号: 51, 期号: 3
作者:  Yan,Zong-Chao;  Jin,Facheng;  Chen,Jing;  Yang,Yujun;  Liu,Xiaojun
  |  收藏  |  浏览/下载：48/0  |  提交时间：2018/11/05
南海北部珠江口盆地惠州21-1油田CO2-EOR与碳封存潜力评价研究 学位论文  OAI收割
硕士, 2017
作者:  刘雪雁
  |  收藏  |  浏览/下载：40/0  |  提交时间：2018/09/26
120Hz线性压缩机与冷指匹配特性分析 期刊论文  OAI收割
红外, 2017, 期号: 5, 页码: 31-36
作者:  赵锐;  蒋珍华;  丁磊;  余慧勤
  |  收藏  |  浏览/下载：20/0  |  提交时间：2018/11/20
南海北部珠江口盆地惠州21-1油田CO_2-EOR与碳封存潜力快速评价 期刊论文  OAI收割
海洋地质前沿, 2017, 卷号: 33, 期号: 03, 页码: 56-65
作者:  刘雪雁;  李鹏春;  周蒂;  LU Jiemin;  陈广浩
  |  收藏  |  浏览/下载：31/0  |  提交时间：2018/09/06
Development and integration of a 50 Hz pellet injection system for the Experimental Advanced Superconducting Tokamak (EAST) 期刊论文  OAI收割
FUSION ENGINEERING AND DESIGN, 2017, 卷号: 114, 期号: 无, 页码: 40-46
作者:  Yao, Xingjia;  Chen, Yue;  Hu, Jiansheng;  Vinyar, Igor;  Lukin, Alexander
收藏  |  浏览/下载：24/0  |  提交时间：2018/05/02