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Long-term Evolution of the Short-term X-Ray Variability of the Jetted TDE Swift J1644+57
Jin, Chichuan1,2
2021-10-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume920Issue:1Pages:16
AbstractThe short-term X-ray variability of tidal disruption events (TDEs) and its similarities with that of active galactic nuclei are poorly understood. In this work, we show the diversity of TDEs' short-term X-ray variability, and take Swift J1644+57 as an example to study the evolution of various properties related to the short-term X-ray variability, such as the X-ray flux distribution, power spectral density (PSD), rms variability, time lag, and coherence spectra. We find that the flux distribution of Swift J1644+57 has a lognormal form in the normal state, but deviates from it significantly in the dipping state, thereby implying different physical mechanisms in the two states. We also find that during the first two XMM-Newton observations in the dipping state, Swift J1644+57 exhibited different variability patterns, which are characterized by steeper PSDs and larger rms than the normal state. A significant soft X-ray lag is detected in these two observations, which is similar to 50 s between 0.3-1 keV and 2-10 keV with a high coherence. Using the 2-10 keV rms of 0.10-0.50, the black hole mass of Swift J1644+57 is estimated to be (0.6-7.9)x10(6)M(circle dot), but the variation of rms as the TDE evolves introduces a large uncertainty. Finally, we discuss the value of conducting similar studies on other TDEs, especially in the coming era of time-domain astronomy when a lot more TDEs will be discovered in X-rays promptly. This also heralds a significant increase in the demand for deep follow-up observations of X-ray selected TDEs with X-ray telescopes of large effective areas and long orbital periods.
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; China Manned Space Project ; China Manned Space Project ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA ; NASA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; China Manned Space Project ; China Manned Space Project ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA ; NASA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; China Manned Space Project ; China Manned Space Project ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA ; NASA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; China Manned Space Project ; China Manned Space Project ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA ; NASA
DOI10.3847/1538-4357/ac1674
WOS KeywordDISRUPTION EVENT CANDIDATE ; TIDAL DISRUPTION ; BLACK-HOLE ; RAPID VARIABILITY ; FOLLOW-UP ; OUTBURST ; TRANSIENT ; MASS ; MULTIWAVELENGTH ; SPECTRUM
Language英语
Funding ProjectNational Natural Science Foundation of China[11873054] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15052100] ; China Manned Space Project[CMS-CSST-2021-B11] ; National Aeronautics and Space Administration ; NASA
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; China Manned Space Project ; China Manned Space Project ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA ; NASA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; China Manned Space Project ; China Manned Space Project ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA ; NASA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; China Manned Space Project ; China Manned Space Project ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA ; NASA ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; China Manned Space Project ; China Manned Space Project ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA ; NASA
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000706850800001
PublisherIOP Publishing Ltd
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/74498
Collection中国科学院国家天文台
Corresponding AuthorJin, Chichuan
Affiliation1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Jin, Chichuan. Long-term Evolution of the Short-term X-Ray Variability of the Jetted TDE Swift J1644+57[J]. ASTROPHYSICAL JOURNAL,2021,920(1):16.
APA Jin, Chichuan.(2021).Long-term Evolution of the Short-term X-Ray Variability of the Jetted TDE Swift J1644+57.ASTROPHYSICAL JOURNAL,920(1),16.
MLA Jin, Chichuan."Long-term Evolution of the Short-term X-Ray Variability of the Jetted TDE Swift J1644+57".ASTROPHYSICAL JOURNAL 920.1(2021):16.
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