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Multicolor Optical Monitoring of theγ-Ray Emitting Narrow-line Seyfert 1 Galaxy PMN J0948+0022 from 2020 to 2021
文献摘要：
In order to study the physical properties of the γ-ray emitting narrow-line Seyfert 1 (NLS1) galaxy population, photometric and spectral observations of theγ-ray emitting NLS1 PMN J0948+0022 were made with the Lijiang 2.4 m optical telescope of Yunnan Observatories, Chinese Academy of Sciences. Photometric data in the B and R bands were collected for 50 nights from 2020 January to 2021 December. During the observation epoch, the variability amplitudes are 73.67％in the B band and 79.96％in the R band. Intra-day variability is found in two observation nights, and the duty cycle value is 29％ with variability amplitude>12.9％ in the R band, which support the presence of the relativistic jets in the target. The redder-when-brighter (RWB) chromatic trend (or steeper-when-brighter trend) appears on intra-day and long timescales. The RWB trend is dominated by the radiation of accretion disk and jet, and resembles those in flat spectrum radio quasars. When PMN J0948+0022 is brighter than 17M· 5 in the R band, there is no color change trend. By analyzing the spectral data of PMN J0948+0022, we obtained the black hole mass of M?=1.61 × 107M⊙and accretion rate of (M)=93, and confirmed that PMN J0948+0022 is a super-Eddington accreting NLS1. The redshifts of reverberation mapped super-Eddington accreting active galactic nuclei can be expanded by PMN J0948+0022 up to above 0.5. Super-Eddington accreting NLS1 galaxies were chosen as a new type of cosmological candle in the literature. PMN J0948+0022 may be used as a target for the next step of reverberation mapping monitoring project of super-Eddington accreting massive black holes.
文献关键词：
中图分类号：
[1] 医药、卫生（R） / 基础医学（R3） / 病理学（R36） / 病理过程（R364）
[2] 数理科学和化学（O） / 力学（O3） / 振动理论（O32） / 非线性振动（O322）
[3] 天文学、地球科学（P） / 地球物理学（P3） / 空间物理（P35）
作者姓名：
Yu-Xin Xin;Ding-Rong Xiong;Jin-Ming Bai;Hong-Tao Liu;Kai-Xing Lu;Ji-Rong Mao
作者机构：
Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory for the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650216,China;Center for Astronomical Mega-Science,Chinese Academy of Sciences,Beijing 100101,China
文献出处：
天文和天体物理学研究
引用格式：
[1]Yu-Xin Xin;Ding-Rong Xiong;Jin-Ming Bai;Hong-Tao Liu;Kai-Xing Lu;Ji-Rong Mao-.Multicolor Optical Monitoring of theγ-Ray Emitting Narrow-line Seyfert 1 Galaxy PMN J0948+0022 from 2020 to 2021)[J].天文和天体物理学研究,2022(07):60-72
A类：
Seyfert,J0948+0022,NLS1,Observatories,redder,RWB,quasars,107M,accreting,reverberation,candle
B类：
Multicolor,Optical,Monitoring,Ray,Emitting,Narrow,line,Galaxy,PMN,from,order,study,physical,properties,ray,emitting,narrow,galaxy,population,photometric,spectral,observations,were,made,Lijiang,optical,telescope,Yunnan,Chinese,Academy,Sciences,Photometric,data,bands,collected,nights,January,December,During,epoch,variability,amplitudes,are,Intra,day,found,two,duty,cycle,value,which,support,presence,relativistic,jets,target,when,brighter,chromatic,trend,steeper,appears,intra,long,timescales,dominated,by,radiation,accretion,disk,resembles,those,flat,spectrum,radio,When,than,17M,there,no,change,By,analyzing,obtained,black,rate,confirmed,that,super,Eddington,redshifts,mapped,active,galactic,nuclei,expanded,above,Super,galaxies,chosen,new,type,cosmological,literature,may,used,next,step,mapping,monitoring,project,massive,holes
AB值：
0.468593
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