Fast γ-Ray Variability in Blazars beyond Redshift 3
Li,Shang1,2; Xia,Zi-Qing1,3; Liang,Yun-Feng1; Liao,Neng-Hui1; Fan,Yi-Zhong1
Source PublicationThe Astrophysical Journal
AbstractAbstract High-redshift blazars are one of the most powerful sources in the universe and γ-ray variability carries crucial information about their relativistic jets. In this work we present results of the first systematical temporal analysis of Fermi-LAT data of all known seven γ-ray blazars beyond redshift 3. Significant long-term γ-ray variability is found from five sources in monthly γ-ray light curves, in which three of them are reported for the first time. Furthermore, intraday γ-ray variations are detected from NVSS J053954?283956 and NVSS J080518+614423. The doubling variability timescale of the former source is limited as short as ?1 hr (at the source frame). Together with variability amplitude over one order of magnitude, NVSS J053954?283956 is the most distant γ-ray flaring blazar so far. Meanwhile, intraday optical variability of NVSS J163547+362930 is found based on an archival PTF/iPTF light curve. Benefiting from the multi-wavelength activity of these sources, constraints on their Doppler factors, as well as the locations of the γ-ray radiation region and indications for the SDSS high redshift jetted active galactic nuclei deficit are discussed.
Keywordgalaxies: active galaxies: high-redshift galaxies: jets gamma rays: galaxies quasars: general radiation mechanisms: non-thermal
WOS IDIOP:0004-637X-853-2-aaa3fb
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, People’s Republic of China;,
2.University of Chinese Academy of Sciences, Yuquan Road 19, Beijing 100049, People’s Republic of China
3.School of Astronomy and Space Science, University of Science and Technology of China, Hefei, 230026, People’s Republic of China
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GB/T 7714
Li,Shang,Xia,Zi-Qing,Liang,Yun-Feng,et al. Fast γ-Ray Variability in Blazars beyond Redshift 3[J]. The Astrophysical Journal,2018,853(2).
APA Li,Shang,Xia,Zi-Qing,Liang,Yun-Feng,Liao,Neng-Hui,&Fan,Yi-Zhong.(2018).Fast γ-Ray Variability in Blazars beyond Redshift 3.The Astrophysical Journal,853(2).
MLA Li,Shang,et al."Fast γ-Ray Variability in Blazars beyond Redshift 3".The Astrophysical Journal 853.2(2018).
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