Bagchi 2008 目前最长的射电喷流 在CGCG 049-033中

主要内容:
> 400 kpc

精彩摘抄:


文章信息:
A Giant Radio Jet Ejected by an Ultramassive Black Hole in a Single‐lobed Radio Galaxy

Joydeep Bagchi,1 Gopal‐Krishna,2 Marita Krause,3 and Santosh Joshi1,4

Received 2007 July 5; accepted 2007 October 8; published 2007 October 30

Online material: color figure

• 1Inter‐University Centre for Astronomy and Astrophysics (IUCAA), Pune University Campus, Post Bag 4, Pune 411007, India; joydeep@iucaa.ernet.in.

• 2National Centre for Radio Astrophysics, TIFR, Pune University Campus, Post Bag 3, Pune 411007, India.

• 3Max‐Planck‐Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany.

• 4Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, NainiTal 263129, India.

Subject headings:

galaxies: active—galaxies: ISM—galaxies: jets—radio continuum: galaxies

ABSTRACT

We report the discovery of a very unusual, highly asymmetric radio galaxy whose radio jet, the largest yet detected, emits strongly polarized synchrotron radiation and can be traced all the way from the galactic nucleus to the hot spot located 440 kpc away. This jet emanates from an extremely massive black hole (> ) and forms a strikingly compact radio lobe. No radio lobe is detected on the side of the counterjet, even though it is similar to the main jet in brightness up to a scale of tens of kiloparsecs. Thus, contrary to the nearly universal trend, the brightness asymmetry in this radio galaxy increases with distance from the nucleus. With several unusual properties, including a predominantly toroidal magnetic field, this Fanaroff‐Riley type II megajet is an exceptionally useful laboratory for testing the role of magnetic field in jet stabilization and radio lobe formation.

The Astrophysical Journal Letters, 670:L85–L88, 2007 December 1

http://www.journals.uchicago.edu/doi/abs/10.1086/524220