类星体红移分布△ln（1＋z）＝0．205周期性的一种解释  

AN EXPLANATION ON REDSHIFT DISTRIBUTION PERIODICITY OF QSO_s

作　　者：胡岳东[1] 周又元[1] 戴和俊[1] 

机构地区：[1]中国科技大学天体物理中心,中国科学院理论物理研究所,哈尔滨工业大学物理系

出　　处：《天文学报》1994年第3期238-245,共8页Acta Astronomica Sinica

摘　　要：根据红移定义１＋ｚ＝λｉ／λ０ｉ，我们认为类星体红移分布ｌｎ（１＋ｚ）周期性受两个因素影响。首先，决定类星体红移的主要线（如Ｌα１２１６，ＣＩＶ１５４９，ＣＩＩＩ１９０９，ＭｇＩＩ２７９８，ＮｅＶ３４２６，ＯＩＩ３７２７，ＮｅＩＩＩ３８６８，Ｈγ４３４０，Ｈβ４８６１，ＯＩＩＩ５００７）固有波长可能构成０．２０５的周期性；另外，这些谱线的观测波长进入一定光学窗口对红移有一定限制，在一定条件下，它正好在某些红移出现峰值，并与ｌｎ（１＋ｚ）＝０．２０５预言峰值一致。我们还在这两个基本考虑下进行模拟取样，发现有明显周期性，定量上证实了我们的基本考虑。本文是类星体红移分布的一种解释，它能说明为什么统计分布不同样品能得到不同的结论。进而，我们认为红移分布周期性不能成为内禀红移观点的观测支持。Accroding to the difinition of redshift,we suppose that there are two effects to cause the observed periodicity in redshift distribution of QSO_s.First,the intrinsic wave lengthes of main lines for determining redshift (L_a 1216,CIV1549,CIII1909, MgII2798,NeV3426,OII3727,NeIII3868,H_γ4340,H_β84861,OIII5007) may have periodicity with period of 0.205.Second,for the observed wavelengthes of the above mentioned lines,furthermore,the observed redshifts are limited by the opticaI window,i.e.3500A-7000A.Under acertain condition,some peaks may appear in the redshift distribution and the peak values may coincide with those expected by T=0.205 periodicity.Considering these two effects,we take simulation sampling of a observed sample and study the periodicities of these samples.The results support our fundmental considerations.The arguements and results in this paper can explain the main observational facts about the redshift distribution of QSO_s,therefore,they do not support the viewpoint that the redshift distribution periodicity of QSO_s is main observational evidence of QSO_s with intrinsic redshift.

关 键 词：周期性 红移分布 类星体 

分 类 号：P158[天文地球—天文学]