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Star formation in high-redshift quasars : Excess [Oii] emission in the radio-loud population
(2012-12-11)
We investigate the [O ii] emission-line properties of 18 508 quasars at z < 1.6 drawn from the Sloan Digital Sky Survey (SDSS) quasar sample. The quasar sample has been separated into 1692 radio-loud and 16 816 radio-quiet ...
Herschel-ATLAS : the far-infrared properties and star-formation rates of broad absorption line quasi-stellar objects
(2012-12-01)
We have used data from the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) at 250, 350 and 500 μm to determine the far-infrared (FIR) properties of 50 broad absorption line quasars (BAL QSOs)
Shocks, seyferts, and the supernova remnant connection : A chandra observation of the circinus galaxy
(2012-10-20)
We analyze new Chandra observations of the nearest (D = 4 Mpc) Seyfert 2 active galaxy, Circinus, and match them to pre-existing radio, infrared, and optical data to study the kpc-scale emission. The proximity of Circinus ...
The nature of the jet-driven outflow in the radio galaxy 3C305
(2012-08-11)
We present Chandra X-ray and Very Large Array radio observations of the radio galaxy 3C305. The X-ray observations reveal the details of the previously known extended X-ray halo around the radio galaxy. We show using X-ray ...
Rejuvenated radio galaxies J0041+3224 and J1835+6204 : how long can the quiescent phase of nuclear activity last?
(2012-08)
We present radio observations of two well-known doubledouble radio galaxies, J0041+3224 and J1835+6204, at frequencies ranging from 150 to 8460 MHz, using both the Giant Metrewave Radio Telescope and the Very Large Array. ...
What determines the properties of the X-ray jets in Fanaroff-Riley type I radio galaxies?
(2012-06-01)
We present the first large sample investigation of the properties of jets in Fanaroff-Riley type I radio galaxies (FR I) based on data from the Chandra archive. We explore relations between the properties of the jets and ...
A transient sub-Eddington black hole X-ray binary candidate in the dust lanes of Centaurus A
(2012-04-20)
We report the discovery of a bright X-ray transient CXOU J132527.6-430023 in the nearby early-type galaxy NGC5128. The source was first detected over the course of five Chandra observations in 2007, reaching an unabsorbed ...
An active galactic nucleus driven shock in the intracluster medium around the radio galaxy 3C310
(2012-04-10)
We present results from a 57.6 ks Chandra observation of the cluster gas associated with the fat-double radio galaxy 3C 310. We find a surface brightness discontinuity in the gas outside the southern radio lobe that we ...
Chandra X-ray Observations of the redshift 1.53, radio-loud quasar 3C 270.1
(2012-01-20)
Chandra X-ray observations of the high redshift (z =1.532) radio-loud quasar 3C270.1 in 2008 February show the nucleus to have a power-law spectrum, Gamma = 1.66 +/- 0.08, typical of a radio-loud quasar, and a marginally-detected ...
Magnetic Fields in Astrophysical Jets : From Launch to Termination
(2012)
Long-lived, stable jets are observed in a wide variety of systems, from protostars, through Galactic compact objects to active galactic nuclei (AGN). Magnetic fields play a central role in launching, accelerating, and ...