supported by the National Natural Science Foundation of China(grant Nos.12422307,12373053,and 12321003);the Key Research Program of Frontier Sciences(grant No.ZDBS-LY-7014);Chinese Academy of Sciences,and the Natural Science Foundation of Jiangsu Province(grant No.BK20221562);supported by the Chinese Academy of Sciences President's International Fellowship Initiative(grant No.2023VMB0001)。
The[O iii]λλ4960,5008 emission lines in the optical spectra of galaxies and quasars have been widely used to investigate the possible variation of the fine-structure constantαover cosmic time.In this work,we utiliz...
supported by the National Natural Science Foundation of China(Grant No.12133007);the National Key Research and Development Program of China(Grant Nos.2021YFA0718503 and 2023YFA1607901);the Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMS-CAS。
Microquasars are the compact objects generally including accreting black holes which produce relativistic jets.The physical mechanisms of jet launching,collimation,and acceleration are poorly understood.Microquasars s...
supported by the National Science Foundation under Grant No.AST-2034437 and a collaboration including Caltech,IPAC;supported by the Basic Research Program of Yunnan Province(No.202201AS070005);the National Natural Science Foundation of China(NSFC,grant No.12273033);the Original Innovation Program of the Chinese Academy of Sciences(E085021002);the support of the science research program for graduate students of Yunnan University(KC-23234629)。
We analyze the optical light curve data,obtained with the Zwicky Transient Facility(ZTF)survey,for 47 γ-ray blazars monitored by the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope(Fermi).These 47sou...
supported by the National Natural Science Foundation of China(NSFC,grant No.12075246);the Fundamental Research Funds for the Central Universities;the Fundamental Research Funds for the Central Universities(grant No.E2EG6602X2 and grant No.E2ET0209X2);supported in part by the Natural Science Foundation of Henan Province and Zhengzhou University(grant Nos.242300420231,JC23149007,35220136);the China Postdoctoral Science Foundation(grant No.2021M692942);the NSFC(grant No.11905224);the NSFC(grant No,12147103);supported by the scientific research starting grants from University of Chinese Academy of Sciences(grant No.118900M061)。
Recently,observational hints for supermassive black holes have been accumulating,prompting the question:Can primordial black holes(PBHs)be supermassive,particularly with masses M■10^(9)M_(⊙)?A supercritical bubble,c...
supported by the Guangxi Natural Science Foundation(No.2021GXNSFBA220044);the National Natural Science Foundation of China(No.11903002);the Research Project of Baise University(No.2019KN04)。
We investigate the relationship between the variability of broad absorption lines(BALs)or narrow absorption lines(NALs)and that of continuum using a data set of two-epoch SDSS spectra containing 134 C IV NAL-BAL pairs...
With the recent observational evidence in extragalactic astronomy,the interpretation of the nature of quasar redshift continues to be a research interest.Very high redshifts are being detected for extragalactic object...
supported by the Basic Research Program of Yunnan Province(No.202201AS070005);the National Natural Science Foundation of China(NSFC,grant No.12273033);the Original Innovation Program of the Chinese Academy of Sciences(E085021002);support of the science research program for graduate students of Yunnan University(KC-23234629)。
We report our identification of three gigaelectronvoltγ-ray sources,4FGL J0502.6+0036,4FGL J1055.9+6507,and 4FGL J1708.2+5519,as Active Galactic Nuclei(AGNs).They are listed in the latest Fermi-Large Area Telescope s...
support from the National Natural Science Foundation of China(NSFC,Grant No.12203034);from the Shanghai Science and Technology Fund under grant No.22YF1431500;from the science research grants from the China Manned Space Project;support from the National Natural Science Foundation of China(NSFC,grant No.12203043);support from the National Natural Science Foundation of China(NSFC,grant No.11933002);support from the National Natural Science Foundation of China(NSFC,grant No.12173026);the National Key Research and Development Program of China(grant No.2022YFC2807303);the Shanghai Science and Technology Fund(grant No.23010503900);the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning;the Shuguang Program(23SG39)of the Shanghai Education Development Foundation and Shanghai Municipal Education Commission;support from the National Natural Science Foundation of China(NSFC,grant No.U2031201,and 11733001);the Scientific and Technological Cooperation Projects(20202023)between the People’s Republic of China and the Republic of Bulgaria;the science research grants from the China Manned Space Project with No.CMS-CSST-2021A06;partially supported by the Bulgarian National Science Fund of the Ministry of Education and Science under grants KP-06-H38/4(2019),KP-06-KITAJ/2(2020),and KP-06-H68/4(2022)。
The location ofγ-ray emission of blazars remains a contested topic,inspiring the development of numerous investigative techniques to address this issue.In this work,we analyzed Fermiγ-ray light curves in the GeV and...
The pictures from the James Webb Space Telescope (JWST) suggest that massive galaxies were already at the beginning of the expansion of the Universe because there was too short time to create them. It is consistent wi...
supported by the Guangxi Natural Science Foundation(No.2021GXNSFBA220044);the National Natural Science Foundation of China(No.11903002);the Research Project of Baise University(No.2019KN04)。
This paper explores the correlation between the fractional variation of the ionizing continuum and CⅣbroad absorption lines(BALs)with different ionization levels.Our results reveal anti-correlations between fractiona...