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X-Shooting ULLYSES: Massive stars at low metallicity: VIII. Stellar and wind parameters of newly revealed stripped stars in Be binaries 期刊论文  OAI收割
ASTRONOMY & ASTROPHYSICS, 2024, 卷号: 692
作者:  Ramachandran, V.;  Sander, A. A. C.;  Pauli, D.;  Klencki, J.;  Backs, F.
  |  收藏  |  浏览/下载：11/0  |  提交时间：2024/12/16
Discovery of a new supergiant fast X-ray transient MAXI J0709-159 associated with the Be star LY Canis Majoris 期刊论文  OAI收割
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 2022, 页码: 12
作者:  Sugizaki, Mutsumi;  Mihara, Tatehiro;  Kobayashi, Kohei;  Negoro, Hitoshi;  Shidatsu, Megumi
  |  收藏  |  浏览/下载：43/0  |  提交时间：2022/09/19
Reanalysis of c-type RR Lyrae variable BE Dor, period modulations and possible mechanism 期刊论文  OAI收割
Monthly Notices of the Royal Astronomical Society, 2022, 卷号: 510, 期号: 4, 页码: 6050-6058
作者:  Li LJ(李临甲);  Qian SB(钱声帮);  Zhu LY(朱俐颖)
  |  收藏  |  浏览/下载：50/0  |  提交时间：2022/03/07
Synchronous X-ray/Optical QPOs from the Black Hole LMXB MAXI J1820+070 期刊论文  OAI收割
Monthly Notices of the Royal Astronomical Society, 2021
作者:  HXMT
  |  收藏  |  浏览/下载：52/0  |  提交时间：2022/02/08
black hole physics  Low Mass X-ray Binaries  accretion  accretion  discs  stars: individual (MAXI J1820+070)  Astrophysics - High Energy  Astrophysical Phenomena  Abstract: We present high-speed optical photometry from SAAO and SALT on the black hole LMXB MAXI J1820+070 (ASSASN-18ey), some of it simultaneous with NICER, Swift and Insight-HXMT X-ray coverage. We detect optical Quasi-Periodic Oscillations (QPOs) that move to higher frequencies as the outburst progresses, tracking both the frequency and evolution of similar X-ray QPOs previously reported. Correlated X-ray/optical data reveal a complex pattern of lags, including an anti-correlation and a sub-second lag that evolve over the first few weeks of outburst. They also show correlated components separated by a lag equal to the QPO period roughly centered on zero lag, implying that the inter-band variability is strongly and consistently affected by these QPOs at a constant phase lag of roughly ±Ю The synchronisation of X-ray and optical QPOs indicates that they must be produced in regions physically very close to each other  we thus propose that they can be explained by a precessing jet model, based on analogies with V404 Cyg and MAXI J1348-630.  
Phase-dependent Study of Near-infrared Disk Emission Lines in LB-1 期刊论文  OAI收割
The Astrophysical Journal, 2020, 卷号: 900, 期号: 1
作者:  Liu,Jifeng;  Zheng,Zheng;  Soria,Roberto;  Aceituno,Jesus;  Zhang,Haotong
  |  收藏  |  浏览/下载：32/0  |  提交时间：2021/12/06
Irregular changes in H alpha emission line of V423 Aur observed by LAMOST Medium-Resolution Spectrographs 期刊论文  OAI收割
RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2020, 卷号: 20, 期号: 3, 页码: 8
作者:  Wu, Chao-Jian;  Wu, Hong;  Hsia, Chih-Hao;  Zhang, Wei;  Ren, Juan-Juan
  |  收藏  |  浏览/下载：19/0  |  提交时间：2021/12/06
A new photometric study of T Tauri stars in the infrared 期刊论文  OAI收割
NEW ASTRONOMY, 2020, 卷号: 74, 页码: 9
作者:  Chen PS(陈培生);  Liu JY(刘杰英);  Dan HG(单红光)
  |  收藏  |  浏览/下载：178/0  |  提交时间：2019/11/25
Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity 期刊论文  OAI收割
Monthly Notices of the Royal Astronomical Society, 2020, 卷号: 497, 页码: 5498-5506
作者:  HXMT
  |  收藏  |  浏览/下载：44/0  |  提交时间：2022/02/08
stars: neutron  pulsars: individual: Swift J0243.6+6124  X-rays:  binaries  Astrophysics - High Energy Astrophysical Phenomena  Abstract: Based on Insight-HXMT data, we report on the pulse fraction evolution during the 2017-2018 outburst of the newly discovered first Galactic ultraluminous X-ray (ULX) source Swift J0243.6+6124. The pulse fractions of 19 observation pairs selected in the rising and fading phases with similar luminosity are investigated. The results show a general trend of the pulse fraction increasing with luminosity and energy at supercritical luminosity. However, the relative strength of the pulsation between each pair evolves strongly with luminosity. The pulse fraction in the rising phase is larger at luminosity below 7.71 × 1038 erg s-1, but smaller at above. A transition luminosity is found to be energy independent. Such a phenomenon is first confirmed by Insight-HXMT observations and we speculate that it may have relation with the radiation-pressure-dominated accretion disc.  
Irregular changes in Hαemission line of V423 Aur observed by LAMOST Medium-Resolution Spectrographs 期刊论文  OAI收割
天文和天体物理学研究:英文版, 2020, 卷号: 20.0, 期号: 003, 页码: 84
作者:  Wu CJ(武朝剑);  Wu H(吴宏);  Xia ZH(夏志浩);  Zhang W(张伟);  Ren JJ(任娟娟)
  |  收藏  |  浏览/下载：5/0  |  提交时间：2021/12/06
Observational constraints on dust disk sizes in tidally truncated protoplanetary disks in multiple systems in the Taurus region 期刊论文  OAI收割
ASTRONOMY & ASTROPHYSICS, 2019, 卷号: 628, 页码: 23
作者:  Manara, C. F.;  Tazzari, M.;  Long, F.;  Herczeg, G. J.;  Lodato, G.
  |  收藏  |  浏览/下载：68/0  |  提交时间：2019/10/21