机构

• 高能物理研究所 [4]
• 国家天文台 [2]
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• 上海天文台 [1]
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• OAI收割 [16]

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• 期刊论文 [16]

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• 2024 [2]
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• Astronomy ... [1]
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• 天文学::恒星与银河... [1]

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浏览/检索结果: 共16条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择提交时间升序提交时间降序作者升序作者降序题名升序题名降序发表日期升序发表日期降序 Self-adaptive LED spectrum-tunable light source with high output irradiance and uniformity 期刊论文  OAI收割 OPTICS COMMUNICATIONS, 2024, 卷号: 569 作者:  Li, Zhengang;  Liu, Jiaxiang;  Pan, Ying;  Cheng, Zhen;  Si, Ganshang   |  收藏  |  浏览/下载：25/0  |  提交时间：2024/11/22 Light emitting diode  Spectral fitting algorithm  Differential evolution  Half-integrating sphere  Light mixing system   Roughness Evolution of Granite Flat Fracture Surfaces during Sliding Processes 期刊论文  OAI收割 APPLIED SCIENCES-BASEL, 2024, 卷号: 14, 期号: 13, 页码: 19 作者:  Yang, Hengtao;  Bai, Bing;  Lin, Hang   |  收藏  |  浏览/下载：8/0  |  提交时间：2025/06/27 granite fracture surfaces  shear slip  roughness evolution  power spectral density (PSD)   Red fruits exhibit lower colour diversity than red flowers as perceived by birds 期刊论文  OAI收割 FUNCTIONAL ECOLOGY, 2023, 卷号: 37, 期号: 12, 页码: 3164-3176 作者:     |  收藏  |  浏览/下载：29/0  |  提交时间：2024/07/10 bird  colour vision  evolutionary history  flower  fruit  pollination  red  seed dispersal  INTERSPECIFIC POLLEN TRANSFER  HUMMINGBIRD POLLINATION  SPECTRAL SENSITIVITY  SEED SIZE  EVOLUTION  DISPERSAL  VISION  BEE  DIVERSIFICATION  CONVERGENCE   Spectral Method for Phase Retrieval: An Expectation Propagation Perspective 期刊论文  OAI收割 IEEE TRANSACTIONS ON INFORMATION THEORY, 2021, 卷号: 67, 期号: 2, 页码: 1332-1355 作者:  Ma, Junjie;  Dudeja, Rishabh;  Xu, Ji   |  收藏  |  浏览/下载：64/0  |  提交时间：2021/04/26 Phase measurement  Message passing  Tools  Signal processing algorithms  Prediction algorithms  Numerical models  Approximation algorithms  Phase retrieval  spectral method  coded diffraction pattern  expectation propagation (EP)  approximate message passing (AMP)  state evolution  orthogonal AMP  vector AMP   ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP). II. Survey Overview: A First Look at 1.3 mm Continuum Maps and Molecular Outflows 期刊论文  OAI收割 The Astrophysical Journal Supplement Series, 2020, 卷号: 251, 期号: 2, 页码: 35 作者:  Dutta, Somnath;  Lee, Chin-Fei;  Liu, Tie;  Hirano, Naomi;  Liu, Sheng-Yuan   |  收藏  |  浏览/下载：63/0  |  提交时间：2020/12/28 Star formation  Star forming regions  Early stellar evolution  Protostars  Low mass stars  Stellar jets  Stellar winds  Astrochemistry  Stellar abundances  Spectral energy distribution  Dense interstellar clouds  Interstellar medium   ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP). II. Survey Overview: A First Look at 1.3 mm Continuum Maps and Molecular Outflows 期刊论文  OAI收割 The Astrophysical Journal Supplement Series, 2020, 卷号: 251, 期号: 2 作者:  Dutta,Somnath;  Lee,Chin-Fei;  Liu,Tie;  Hirano,Naomi;  Liu,Sheng-Yuan   |  收藏  |  浏览/下载：44/0  |  提交时间：2021/12/06 Star formation  Star forming regions  Early stellar evolution  Protostars  Low mass stars  Stellar jets  Stellar winds  Astrochemistry  Stellar abundances  Spectral energy distribution  Dense interstellar clouds  Interstellar medium   Estimating Dust Attenuation from Galactic Spectra. I. Methodology and Tests 期刊论文  OAI收割 The Astrophysical Journal, 2020, 卷号: 896, 期号: 1 作者:  Li,Niu;  Li,Cheng;  Mo,Houjun;  Hu,Jian;  Zhou,Shuang   |  收藏  |  浏览/下载：37/0  |  提交时间：2021/12/06 Dust continuum emission  Interstellar medium  Galaxies  Interstellar dust extinction  Stellar populations  Extragalactic astronomy  Spectral energy distribution  Spectroscopy  Galaxy evolution  Galaxy processes  Interstellar absorption  Sky surveys   An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 期刊论文  OAI收割 Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101 作者:  HXMT   |  收藏  |  浏览/下载：70/0  |  提交时间：2022/02/08 accretion  accretion disks  black hole physics  X-rays: binaries  time  Astrophysics - High Energy Astrophysical Phenomena  Abstract: Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions. Methods: Within the multitude of observations of Swift J1658.2-4242 during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst. Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.   Real-Time Evolution Dynamics of Double-Pulse Mode-Locking 期刊论文  OAI收割 IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 2019, 卷号: 25, 期号: 4 作者:  Wang, Guomei;  Chen, Guangwei;  Li, Wenlei;  Zeng, Chao   |  收藏  |  浏览/下载：148/0  |  提交时间：2019/07/19 Dispersive Fourier transform technique  spectral evolution dynamics  double-pulse mode-locking  Er-doped fiber laser   Constant cyclotron line energy in Hercules X-1 - Joint Insight-HXMT and NuSTAR observations 期刊论文  OAI收割 Journal of High Energy Astrophysics, 2019, 卷号: 23, 页码: 29-32 作者:  HXMT   |  收藏  |  浏览/下载：62/0  |  提交时间：2022/02/08 Stars: neutron star  Pulsars: binary(Her X-1)  X-rays: stars  Astrophysics - High Energy Astrophysical Phenomena  Abstract: The long-term evolution of the centroid energy of the CRSF in Her X-1 is still a mystery. We report a new measurement from a campaign between Insight-HXMT and NuSTAR performed in February 2018. Generally, the two satellites show well consistent results of timing and spectral properties. The joint spectral analysis confirms that the previously observed long decay phase has ended, and that the line energy instead keeps constant around 37.5 keV after flux correction.