On the Doppler boosting in the compact radio jet of the distant blazar J1026+2542 at z = 5.3

Frey, Sándor and Fogasy, Olimpia Judit and Paragi, Z. and Gurvits, L. I. (2013) On the Doppler boosting in the compact radio jet of the distant blazar J1026+2542 at z = 5.3. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 431. pp. 1314-1319. ISSN 0035-8711

Preview

Text 1302.2209v1.pdf Available under License Creative Commons Attribution. Download (403kB) | Preview

Abstract

Based on its broad-band spectral energy distribution, and the X-ray spectrum in particular, the radio-loud active galactic nucleus (AGN) SDSS J102623.61+254259.5 (J1026+2542) has recently been classified as a blazar. The extremely high redshift of the source, z=5.3, makes it one of the most distant and most luminous radio- loud AGN known to date. From published 5-GHz very long baseline interferometry (VLBI) imaging data obtained in 2006, the source has a typical blazar appearance on mas scales, with a prominent one-sided jet extending to ∼20 mas. We estimate the brightness temperature of J1026+2542 and find no strong evidence for Doppler boosting. The jet viewing angle is possibly at least ∼20◦. The bulk Lorentz factor and the viewing angle of the jet could reliably be determined in the near future from multi-epoch VLBI observations.

Actions (login required)

Edit Item