The Hubble Relation for a Comprehensive Sample of QSOs

Journal of astrophysics and astronomy

D. Basu1¹ 

[1] Department of Physics, Carleton University, Ottawa, ON K1S 5B6, Canada.$$

关键词: Cosmology;    Hubble relation;    quasi stellar objects or QSOs;    redshifts.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

A correlation between redshifts (𝑧) and apparent magnitudes (𝑉) (Hubble relation) of Quasi Stellar Objects (QSOs) has long been sought. Such a correlation exists for galaxies whose redshifts are of cosmological origin. However, a plot of the two quantities representing the Hubble diagram for QSOs exhibits, in general, a wild scatter. This raises the question whether redshifts of QSOs are cosmological. On the other hand, most luminous QSOs in groups, and subsamples with particular properties, have been reported to show the Hubble relation. In the present paper, we analyse all optically non-variable QSOs in a comprehensive sample. In our analysis we grouped the objects into certain intervals of apparent magnitudes. Correlations obtained between redshifts and magnitudes are all statistically robust. Also, the Hubble relation in the usual form 𝑉 = 5 log 𝑧+C is obeyed very convincingly for QSOs with 𝑉 < 19.5.

【 授权许可】

Unknown