Astrophysics

    

Evaluating the Alignment of the Polarized Radio Waves from 13 QSOs in Ursa Major

Authors: Richard Shurtleff

A sample of 13 quasi-stellar objects, QSOs, with polarized radio emissions and located in the Southern part of Ursa Major is shown by the Hub Test to have significantly aligned polarization directions. The QSOs are taken from the JVAS1450 subset of the JVAS/CLASS 8.4-GHz surveys. The Hub Test evaluates alignment indirectly by extending the sources' polarization directions around the Celestial Sphere and quantifying the degree of convergence of these geodesics, i.e. great circles, at points on the Celestial Sphere. The hub of best convergence is found to be close to the sources. About one in 50,000 randomly directed samples would be better aligned than the polarization directions of these 13 QSOs. Some underlying calculations are presented in a Mathematica-coded Appendix. Access to a ready-to-run version is provided.

Comments: 9 pages, 25 figures, 17 references, 56 page Appendix

Download: PDF

Submission history

[v1] 2021-10-16 15:37:16

Unique-IP document downloads: 274 times

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