Cosmological effects on Size Evolution of some Extragalactic Radio Sources and Quasar/Galaxy Unification

Chukwuemerie, Ezeugo Jeremiah (2021) Cosmological effects on Size Evolution of some Extragalactic Radio Sources and Quasar/Galaxy Unification. Asian Journal of Research and Reviews in Physics, 4 (2). pp. 21-24. ISSN 2582-5992

[thumbnail of 63-Article Text-117-1-10-20220901.pdf] Text
63-Article Text-117-1-10-20220901.pdf - Published Version

Download (271kB)

Abstract

We use analytical methods to develop a mathematical model that expresses the relationship between the linear size of some extragalactic radio sources (EGRS) and their redshift . Result shows that , where . For the purpose of obtaining an empirical relation of similar form, we carry out simple linear regression analyses of the observed linear sizes of these EGRS in our sample against their respective observed redshifts. We obtain an empirical relation of the form, , where and for radio-loud quasars and radio galaxies respectively, with correlation coefficients given by, for each of the sources. The correlation is marginal/slight. Comparing the theoretical and empirical relations, we find that the data show an inverse correlation which is similar to the theory. This suggestively indicates presence of cosmological effects on the size evolution of the radio sources. Moreover, we find that similarity in the behavior of the two sources in the plane, simply supports quasar/galaxy unification scheme in which the different observable properties that characterize these two subclasses of radio sources are aspect-dependent.

Item Type: Article
Subjects: Research Asian Plos > Physics and Astronomy
Depositing User: Unnamed user with email support@research.asianplos.com
Date Deposited: 06 Feb 2023 07:52
Last Modified: 21 Oct 2024 04:22
URI: http://abstract.stmdigitallibrary.com/id/eprint/79

Actions (login required)

View Item
View Item