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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Time-Series Analysis of Terrestrial Impact Crater Records
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Time-Series Analysis of Terrestrial Impact Crater Records

机译：地面撞击坑记录的时间序列分析

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Adatabaseofimpactcratersbecomesavailablewithmoreaccurateandmorepreciseageestimatesduetoanewdecayconstant.Thismotivatesustorevisittheperiodicityhypothesisfortheterrestrialimpactcrateringrate,usingthenewdataset.Wepresentanewwaytoanalyzetheimpactcrateringrateasanoscillatorinthetimedomain.Thistechniqueaimstoproduceanaccuratefrequencyofanoscillatorwhosephaseismodulated,andtorevealtheslowlyvaryingphasefunction.Havingappliedthetechniquetorecentcrateringrecords,whicharegroupedinto6subsamplesbycriteriaontheageanddiameterofimpactcraters,wefoundthepresenceofa$$sim26,mathrm{Myr}$$periodicityintheimpactcrateringrateoverthelast$$sim250,mathrm{Myr}$$.Suchaperiodicitycanbefoundconsistentlyinsubsamplesregardlessofthelowerlimitofthediameterupto$$Dsim35,mathrm{km}$$.WehavealsocalculatedtheperiodoftheimpactcrateringrateusingtheLomba€“Scargleperiodogrammethod.TheLomba€“Scargleperiodogrammethodyieldsslightlymorescatteredperiods,implyingthatourtechniqueismorerobustandstablethantheLomb-Scargleperiodogramanalysis.Asreproducing$$f(t)$$,wefoundthatitstypicalmagnitudeof$$epsilon,overline{f(t)}$$ismuchsmallerthanthatofthefrequency.Therefore,weconcludethattheimpactcrateringratemayberegardedasunimodal.
机译：Adatabaseofimpactcratersbecomesavailablewithmoreaccurateandmorepreciseageestimatesduetoanewdecayconstant.Thismotivatesustorevisittheperiodicityhypothesisfortheterrestrialimpactcrateringrate，usingthenewdataset.Wepresentanewwaytoanalyzetheimpactcrateringrateasanoscillatorinthetimedomain.Thistechniqueaimstoproduceanaccuratefrequencyofanoscillatorwhosephaseismodulated，andtorevealtheslowlyvaryingphasefunction.Havingappliedthetechniquetorecentcrateringrecords，whicharegroupedinto6subsamplesbycriteriaontheageanddiameterofimpactcraters，wefoundthepresenceofa $$ sim26，mathrm {}秘耳$$ periodicityintheimpactcrateringrateoverthelast $$ sim250，mathrm {}秘耳$$。Suchaperiodicitycanbefoundconsistentlyinsubsamplesregardlessofthelowerlimitofthediameterupto $$ Dsim35，mathrm {}公里$$我们还使用了Lomba的“ S周期图”方法计算了撞击坑的周期。Lomba的“ io周期图”方法散落的周期略多，这暗示着我们的技术论或侵蚀论比Lomb-Scargle周期图更稳定sis。再现$ f（t）$$时，发现其典型的$ epsilon量级，其上线{f（t）} $$比频率小得多。因此，我们得出结论认为，影响火山爆发率可能被认为是单峰的。

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