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X-Ray Intraday Variability of the TeV Blazar Mrk 421 with Suzaku
Zhang, Zhongli1; Gupta, Alok C.2; Gaur, Haritma2; Wiita, Paul J.3; An, Tao1; Gu, Minfeng4; Hu, Dan5; Xu, Haiguang5,6,7
2019-10-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume884Issue:2Pages:11
Corresponding AuthorZhang, Zhongli(zzl@shao.ac.cn)
AbstractWe present X-ray flux and spectral analyses of the three pointed Suzaku observations of the TeV high synchrotron peak blazar Mrk 421 taken throughout its complete operational duration. The observation taken on 2008 May 5 is, at 364.6 ks (i.e., 101.3 hr), the longest and most evenly sampled continuous observation of this source, or any blazar, in the X-ray energy 0.8-60 keV until now. We found large amplitude intraday variability in all soft and hard bands in all the light curves. The discrete correction function analysis of the light curves in soft and hard bands peaks on zero lag, showing that the emission in hard and soft bands are cospatial and emitted from the same population of leptons. The hardness ratio plots imply that the source is more variable in the harder bands compared to the softer bands. The source is harder when brighter, following the general behavior of high synchrotron peak blazars. Power spectral densities of all three light curves are red noise dominated, with a range of power spectra slopes. If one assumes that the emission originates very close to the central super massive black hole, a crude estimate for its mass, of similar to 4 x 10(8) M-circle dot, can be made; but if the variability is due to perturbations arising there that are advected into the jet and are thus Doppler boosted, substantially higher masses are consistent with the quickest seen variations. We briefly discuss the possible physical mechanisms most likely responsible for the observed flux and spectral variability.
DOI10.3847/1538-4357/ab3f3a
WOS KeywordBLACK-HOLE MASS ; BL LACERTAE OBJECTS ; PARTICLE-ACCELERATION ; XMM-NEWTON ; MULTIWAVELENGTH OBSERVATIONS ; SPECTRAL VARIABILITY ; OPTICAL VARIABILITY ; FLARING ACTIVITY ; RADIO OUTBURSTS ; LIGHT-CURVE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000501779300005
PublisherIOP PUBLISHING LTD
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/35278
Collection中国科学院紫金山天文台
Corresponding AuthorZhang, Zhongli
Affiliation1.Chinese Acad Sci, Key Lab Radio Astron, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Aryabhatta Res Inst Observat Sci ARIES, Manora Peak 263002, Nainital, India
3.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA
4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
5.Shanghai Jiao Tong Univ, Sch Phys & Astron, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
6.Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
7.Shanghai Jiao Tong Univ, IFSA Collaborat Innovat Ctr, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Zhongli,Gupta, Alok C.,Gaur, Haritma,et al. X-Ray Intraday Variability of the TeV Blazar Mrk 421 with Suzaku[J]. ASTROPHYSICAL JOURNAL,2019,884(2):11.
APA Zhang, Zhongli.,Gupta, Alok C..,Gaur, Haritma.,Wiita, Paul J..,An, Tao.,...&Xu, Haiguang.(2019).X-Ray Intraday Variability of the TeV Blazar Mrk 421 with Suzaku.ASTROPHYSICAL JOURNAL,884(2),11.
MLA Zhang, Zhongli,et al."X-Ray Intraday Variability of the TeV Blazar Mrk 421 with Suzaku".ASTROPHYSICAL JOURNAL 884.2(2019):11.
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