Joydeep Bagchi et al 2007 ApJ 670 L85 doi:10.1086/524220
A Giant Radio Jet Ejected by an Ultramassive Black Hole in a Single-lobed Radio Galaxy
FREE ISSUEJoydeep Bagchi1, Gopal-Krishna2, Marita Krause3 and Santosh Joshi1,4
Show affiliationsWe 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 (>109 M
) 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.
- Subject headings
galaxies: active; galaxies: ISM; galaxies: jets; radio continuum: galaxies
- Dates
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Issue 2 (2007 December 1)
Received 2007 July 5, accepted for publication 2007 October 8
Published 2007 October 30
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A Giant Radio Jet Ejected by an Ultramassive Black Hole in a Single-lobed Radio Galaxy
Joydeep Bagchi et al 2007 ApJ 670 L85
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