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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)
发表期刊ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
1997-06
卷号123期号:3页码:569-574
产权排序第2完成单位
收录类别SCI
关键词Accretion Accretion Disk Bl Lac Objects Individual Mkn 421
摘要All 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..
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0365-0138
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WOS记录号WOS:A1997XJ14000011
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]BL-LACERTAE OBJECTS ; UBVRI PHOTOPOLARIMETRIC OBSERVATIONS ; 0.35-3.5 MICRON PHOTOMETRY ; ACCRETION DISKS ; LAC OBJECTS ; VARIABILITY ; QUASARS ; BLAZARS ; RADIATION
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被引频次:41[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6880
专题星系研究组
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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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