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Compact and Variable Radio Emission from an Active Galaxy with Supersoft X-Ray Emission

文献类型：期刊论文

作者Yang, Lei1; Shu, Xinwen1; Zhang, Fabao1; Chandola, Yogesh2; Liu, Daizhong3; Liu, Yi2; Gu, Minfeng4; Giustini, Margherita5; Jiang, Ning6; Li, Ya-Ping4
刊名ASTROPHYSICAL JOURNAL
出版日期2022-08-01
卷号935期号:2页码:9
ISSN号0004-637X
DOI10.3847/1538-4357/ac80ba
英文摘要RX J1301.9+2747 is a unique active galaxy with a supersoft X-ray spectrum that lacks significant emission at energies above 2 keV. In addition, it is one of few galaxies displaying quasiperiodic X-ray eruptions that recur on a timescale of 13-20 ks. We present multiepoch radio observations of RX J1301.9+2747 using GMRT, Very Large Array (VLA), and Very Long Baseline Array (VLBA). The VLBA imaging at 1.6 GHz reveals a compact radio emission unresolved at a scale of <0.7 pc, with a brightness temperature of T (b) > 5 x 10(7) K. The radio emission is variable by more than a factor of 2.5 over a few days, based on the data taken from VLA monitoring campaigns. The short-term radio variability suggests that the radio emitting region has a size as small as 8 x 10(-4) pc, resulting in an even higher brightness temperature of T (b) similar to 10(12) K. A similar limit on the source size can be obtained if the observed flux variability is not intrinsic and caused by the interstellar scintillation effect. The overall radio spectrum is steep with a time-averaged spectral index alpha = -0.78 +/- 0.03 between 0.89 and 14 GHz. These observational properties rule out a thermal or star formation origin of the radio emission, and appear to be consistent with the scenario of episodic jet ejections driven by a magnetohydrodynamic process. Simultaneous radio and X-ray monitoring observations down to a cadence of hours are required to test whether the compact and variable radio emission is correlated with the quasiperiodic X-ray eruptions.
WOS关键词LINE SEYFERT-1 GALAXIES ; QUASI-PERIODIC ERUPTIONS ; GALACTIC NUCLEI ; MAGNETOHYDRODYNAMIC MODEL ; CONTINUUM SURVEY ; BLACK-HOLES ; SKY SURVEY ; QUIET ; VARIABILITY ; MULTIWAVELENGTH
资助项目National Science Foundation of China (NSFC)[11822301] ; National Science Foundation of China (NSFC)[12192220] ; National Science Foundation of China (NSFC)[12192221] ; National Science Foundation of China (NSFC)[11833007] ; NSFC[11873073] ; NSFC[12050410259] ; NSFC[11988101] ; Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch[JCYJ-SHFY-2021-013] ; science research grants from the China Manned Space Project[CMSCSST-2021-A06] ; Center for Astronomical Mega-Science, Chinese Academy of Sciences[19-FAST-02] ; MOST[QNJ2021061003L] ; Major Science and Technology Project of Qinghai Province[2019-ZJA10] ; "Programa de Atraccion de Talento" of the Comunidad de Madrid[2018T1/TIC-11733] ; [VLA/15A-349] ; [VLA/17B-027] ; [VLA/18B-115] ; [28_039]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP Publishing Ltd
WOS记录号WOS:000843701400001
资助机构National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; NSFC ; NSFC ; Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch ; Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch ; science research grants from the China Manned Space Project ; science research grants from the China Manned Space Project ; Center for Astronomical Mega-Science, Chinese Academy of Sciences ; Center for Astronomical Mega-Science, Chinese Academy of Sciences ; MOST ; MOST ; Major Science and Technology Project of Qinghai Province ; Major Science and Technology Project of Qinghai Province ; "Programa de Atraccion de Talento" of the Comunidad de Madrid ; "Programa de Atraccion de Talento" of the Comunidad de Madrid ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; NSFC ; NSFC ; Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch ; Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch ; science research grants from the China Manned Space Project ; science research grants from the China Manned Space Project ; Center for Astronomical Mega-Science, Chinese Academy of Sciences ; Center for Astronomical Mega-Science, Chinese Academy of Sciences ; MOST ; MOST ; Major Science and Technology Project of Qinghai Province ; Major Science and Technology Project of Qinghai Province ; "Programa de Atraccion de Talento" of the Comunidad de Madrid ; "Programa de Atraccion de Talento" of the Comunidad de Madrid ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; NSFC ; NSFC ; Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch ; Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch ; science research grants from the China Manned Space Project ; science research grants from the China Manned Space Project ; Center for Astronomical Mega-Science, Chinese Academy of Sciences ; Center for Astronomical Mega-Science, Chinese Academy of Sciences ; MOST ; MOST ; Major Science and Technology Project of Qinghai Province ; Major Science and Technology Project of Qinghai Province ; "Programa de Atraccion de Talento" of the Comunidad de Madrid ; "Programa de Atraccion de Talento" of the Comunidad de Madrid ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; NSFC ; NSFC ; Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch ; Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch ; science research grants from the China Manned Space Project ; science research grants from the China Manned Space Project ; Center for Astronomical Mega-Science, Chinese Academy of Sciences ; Center for Astronomical Mega-Science, Chinese Academy of Sciences ; MOST ; MOST ; Major Science and Technology Project of Qinghai Province ; Major Science and Technology Project of Qinghai Province ; "Programa de Atraccion de Talento" of the Comunidad de Madrid ; "Programa de Atraccion de Talento" of the Comunidad de Madrid
源URL[http://ir.bao.ac.cn/handle/114a11/87566]  
专题中国科学院国家天文台
通讯作者Shu, Xinwen
作者单位1.Anhui Normal Univ, Dept Phys, Wuhu 241002, Anhui, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210023, Peoples R China
3.Max Planck Inst Extraterr Phys MPE, Giessenbachstr 1, D-85748 Garching, Germany
4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
5.CSIC INTA, Ctr Astrobiol CAB, Camino Bajo Castillo S-N, E-28692 Madrid, Spain
6.Univ Sci & Technol China, Dept Astron, Hefei 230026, Anhui, Peoples R China
7.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
8.Univ Paris Diderot, CEA Saclay, CEA DRF Irfu CNRS, Lab AIM Paris Saclay, F-91191 Gif Sur Yvette, France
9.NSFs Natl Opt Infrared Astron Res Lab, 950 North Cherry Ave, Tucson, AZ 85719 USA
10.Univ Trieste, Dept Phys, Astron Unit, Via Tiepolo 11, I-34131 Trieste, Italy
推荐引用方式
GB/T 7714		 Yang, Lei,Shu, Xinwen,Zhang, Fabao,et al. Compact and Variable Radio Emission from an Active Galaxy with Supersoft X-Ray Emission[J]. ASTROPHYSICAL JOURNAL,2022,935(2):9.
APA Yang, Lei.,Shu, Xinwen.,Zhang, Fabao.,Chandola, Yogesh.,Liu, Daizhong.,...&Zhou, Hongyan.(2022).Compact and Variable Radio Emission from an Active Galaxy with Supersoft X-Ray Emission.ASTROPHYSICAL JOURNAL,935(2),9.
MLA Yang, Lei,et al."Compact and Variable Radio Emission from an Active Galaxy with Supersoft X-Ray Emission".ASTROPHYSICAL JOURNAL 935.2(2022):9.

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