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The long-term optical behavior of Mkn 421
Liu FK(刘复坤); Liu BF(刘碧芳); Xie GZ(谢光中)
Source PublicationASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
1997-06
Volume123Issue:3Pages:569-574
Contribution Rank第2完成单位
Indexed BySCI
KeywordAccretion Accretion Disk Bl Lac Objects Individual Mkn 421
AbstractAll data available in B band for the BL Lac object Mkn 421 from 22 publications are used to construct a historical light curve, dating back to 1900. It is found that the light curve is very complicated and consists of a set of outbursts with very large duration. The brightness of Mkn 421 varies from 11.6 magnitude to more than 16 magnitude. Analyses with Jurkevich method of computing periods of cyclic phenomena reveal in the light curve two kinds of behaviors. The first one is non-periodic with rapid, violent variations in intensity on time scales of hours to days. The second one is periodic with a possible period of 23.1 +/- 1.1 years. Another possible period of 15.3 +/- 0.7 years is not very significant. We have tested the robustness of the Jurkevich method. The period of about one year found in the light curves of Mkn 421 and of other objects is a spurious period due to the method and the observing window. We try to explain the period of 23.1 +/- 1.1 years under the thermal instability of a slim accretion disk around a massive black hole of mass 2 10(6) M..
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0365-0138
URL查看原文
WOS IDWOS:A1997XJ14000011
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordBL-LACERTAE OBJECTS ; UBVRI PHOTOPOLARIMETRIC OBSERVATIONS ; 0.35-3.5 MICRON PHOTOMETRY ; ACCRETION DISKS ; LAC OBJECTS ; VARIABILITY ; QUASARS ; BLAZARS ; RADIATION
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6880
Collection星系研究组
Recommended Citation
GB/T 7714
Liu FK,Liu BF,Xie GZ. The long-term optical behavior of Mkn 421[J]. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,1997,123(3):569-574.
APA 刘复坤,刘碧芳,&谢光中.(1997).The long-term optical behavior of Mkn 421.ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,123(3),569-574.
MLA 刘复坤,et al."The long-term optical behavior of Mkn 421".ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES 123.3(1997):569-574.
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