Relation between positional & strength asymmetries of double radio sources associated with active galaxies

Details Relation between positional & strength asymmetries of double radio sources associated with active galaxies Relation between positional & strength asymmetries of double radio sources associated with active galaxies

Publishing date

2009-09-23

URL

arxiv.org/abs/0909.4284v1

Science

Astronomy and Astrophysics

Field

Astrophysics

SubField

Galaxy Astrophysics

Additional info

3 pages

Type

Scientific paper

Abstract

We bring out the identity between two ways of defining a single parameter to combine positional & strength asymmetries of extended extragalactic double radio sources associated with active galaxies. Thus, (r.s - 1)/[(1 + r).(1 + s)], combining arm ratio r (defined to be <= 1, i.e., shorter to longer arm) & strength ratio s (in the sense closer to farther, so that it may be <, > or = 1), is identical to -(1/2)[(1 - fr)/(1 + fr) - t], where fr is strength ratio defined >= 1 (i.e., stronger to weaker), & t = +/- (Q - 1)/(Q + 1), +/- signs applying respectively to doubles with closer hotspot fainter & those with closer hotspot brighter, while Q is arm ratio defined >= 1. Keywords: active galaxies - double radio sources - bilateral symmetry - arm ratio - flux ratio

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