Relation between Events in the Millimeter-wave Core and Gamma-ray Outbursts in Blazar Jets

Дата и время публикации : 2012-04-30T17:24:02Z

Авторы публикации и институты :
A. P. Marscher
S. G. Jorstad
I. Agudo
N. R. MacDonald
T. L. Scott

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 2012 Fermi & Jansky Proceedings – eConf C1111101
Первичная категория: astro-ph.HE

Все категории : astro-ph.HE

Краткий обзор статьи: Analysis of comprehensive monitoring of 34 gamma-ray bright quasars, BL Lac objects, and radio galaxies reveals a close connection between events in the millimeter-wave emission imaged with the VLBA at 43 GHz and flares at gamma-ray and lower frequencies. Roughly 2/3 of the flares are coincident with the appearance of a new superluminal knot and/or a flare in the millimeter-wave "core’" located parsecs from the central engine. This presents a theoretical challenge to explain how the gamma-ray flux can often be variable on intra-day time-scales. Possible answers to this include very narrow opening angles of the jet, small volume filling factors of the highest energy electrons, chaotic magnetic fields, and turbulent velocity fields relative to the mean jet flow.

Category: Physics