BL Lac天体Mrk 421的光变周期分析
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摘要
收集了BL Lac天体Mrk 421光学V波段从2008年10月至2016年12月间共487个观测数据点,获得了光学V波段的变化曲线.用离散相关函数(DCF)方法和Jurkevich方法进行了周期分析,发现Mrk 421在光学V波段存在约(585±15)d的中短时标光变周期,并利用理论模型探讨了引起光变现象的可能原因.
487 data of BL Lac object Mrk 421 in the optical V band were collected from the database of the Steward Observatory Fermi Blazar Monitoring Project,and its light curve of the V band from October 2008 to December 2016 was constructed.Using the discrete correlation function(DCF)method and Jurkevich′s method to analyze the data,we find that the V band curve variability period of BL Lac Mrk 421 is(585±15)days.We have discussed the causes of the light variability phenomenon from the theoretical model.
487 data of BL Lac object Mrk 421 in the optical V band were collected from the database of the Steward Observatory Fermi Blazar Monitoring Project,and its light curve of the V band from October 2008 to December 2016 was constructed.Using the discrete correlation function(DCF)method and Jurkevich′s method to analyze the data,we find that the V band curve variability period of BL Lac Mrk 421 is(585±15)days.We have discussed the causes of the light variability phenomenon from the theoretical model.
引文
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[18]SHUKLA A,CHITNIS V R,VISHWANATH P R,et al.Multiwave length study of the TeV blazar Mrk 421during agiant flare[J].Astronomy&Astrophysics,2012,541(3):140-149.
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*http://james.as.arizona.edu/~psmith/Fermi/DATA/specdata.html.
[2]毕雄伟,和万全,田家金,等.BL Lac天体Mrk 421X射线辐射流量变化特性研究[J].天文研究与技术,2013,10(3):207-213.
[3]LIU F K,LIU B F,XIE G Z.The long-term optical behavior of Mrk 421[J].Astronomy&Astrophysics Supplement Series,1997,123(3):569-574.
[4]CHEN X,HU S M,GUO D F,et al.Optical variability of Mrk 421[J].Astrophysics and Space Science,2014,349(2):909-917.
[5]李孝攀,张雄,张皓晶,等.BL Lac天体Mkn 421射电流量变化周期特性[J].中国科学:物理学力学天文学,2011,41(3):325-330.
[6]LI H Z,JIANG Y G,GUO D F,et al.Multiband Variability Analysis of Mrk 421[J].Publications of the Astronomical Society of Pacific,2016,128(965):074101-074116.
[7]EDELSON R A,KROLIK J H.The discrete correlation function-A new method for analyzing unevenly sampled variability data[J].Astrophysical Journal,1988,333(134):646-659.
[8]毕雄伟,和万全,田家金,等.类星体3C273的多波段光变周期分析[J].天文研究与技术,2012,9(4):1-9.
[9]王兴华,张雄.离散相关函数在Blazar天体中的应用[J].云南师范大学学报:自然科学版,2010,30(6):25-33.
[10]王文广,张皓晶,王雪品,等.BL Lac天体PKS 0537-441的光变特性分析[J].云南师范大学学报:自然科学版,2016,36(3):1-7.
[11]JURKEVICH I.A Method of Computing Periods of Cyclic Phenomena[J].Astrophysics and Space Science,1971,13(1):154-167.
[12]KIDGER M,TAKALO L,SILLANPAA A.A new analysis of the 11-year period in OJ287-Confirmation of its existence[J].Astronomy and Astrophysics,1992,264(1):32-36.
[13]方婷,梁继华,李文红,等.BL Lac天体3C66A的光变周期分析[J].云南师范大学学报:自然科学版,2015,35(4):1-4.
[14]毕雄伟,张青友,和万全.BL Lac天体PKS2155-304的光变周期分析[J].云南师范大学学报:自然科学版,2012,32(6):1-5.
[15]WAGNER S J,WITZEL A.Intraday Variability In Quasars and BL Lac Objects[J].Annual Review of Astronomy and Astrophysics,1995,33(1):163-198.
[16]LEHTO H J,VALTONEN M J.OJ 287 Outburst Structure and a Binary Black Hole Model[J].Astrophysical Journal,1996,460(1):207-212.
[17]VILLATA M,RAITERI C M,GHISELLINI G,et al.Optical photometric monitoring ofγ-ray loud blazars.I.Observations from November 1994to November 1995[J].Astronomy&Astrophysics Supplement Series,1997,121(1):119-138.
[18]SHUKLA A,CHITNIS V R,VISHWANATH P R,et al.Multiwave length study of the TeV blazar Mrk 421during agiant flare[J].Astronomy&Astrophysics,2012,541(3):140-149.
[19]RIEGER F M.On the Geometrical Origin of Periodicity in Blazar-type Sources[J].Astrophysical Journal,2004,615(1):L5-L8.
[20]WU J,ZHOU X,PENG B,et al.Optical monitoring of PKS 1510-089:a binary black hole system?[J].Monthly Notices of the Royal Astronomical Society,2005,361(1):155-159.
[21]LI H Z,XIE G Z,CHEN L E,et al.The Periodicity Analysis of the Light Curve of 3C279and Implications for the Precession Jet[J].Publications of the Astronomical Society of Pacific,2009,121(885):1172-1179.
*http://james.as.arizona.edu/~psmith/Fermi/DATA/specdata.html.