Intermediate Resolution Spectroscopy of the Radio Galaxy B2 0902+34 at Z ≈ 3.4

B2 0902+34: a Collapsing Protogiant Elliptical Galaxy at Z=3.4

We have used the visible integral-field replicable unit spectrograph prototype (VIRUS-P), a new integral field spectrograph, to study the spatially and spectrally resolved Lyman-α emission line structure in the radio galaxy B2 0902+34 at z = 3.4. We observe a halo of Lyman-α emission with a velocity dispersion of ≈250 km s−1 extending to a radius of 50 kpc. A second feature is revealed in a spa...

Radio Galaxy Clustering at z ∼ 0.3

Radio galaxies are uniquely useful as probes of large-scale structure as their uniform identification with giant elliptical galaxies out to high redshift means that the evolution of their bias factor can be predicted. As the initial stage in a project to study large-scale structure with radio galaxies we have performed a small redshift survey, selecting 29 radio galaxies in the range 0.19 < z <...

Radio Polarization from the Inner Galaxy at Arcminute Resolution

The Southern Galactic Plane Survey (SGPS) is an H I and 1.4-GHz continuum survey of the 4th quadrant of the Galaxy at arcmin resolution. We present here results on linearly polarized continuum emission from an initial 28-square-degree Test Region for the SGPS, consisting of 190 mosaiced pointings of the Australia Telescope Compact Array, and covering the range 325.5< l < 332.5, −0.5< b< +3.5. C...

NEAR-INFRARED SPECTROSCOPY OF POWERFUL RADIO GALAXIES AT z\ 2.2È2.6

Near-infrared spectroscopy of eight high-redshift powerful radio galaxies (jrest D 3700È6800 AŽ ) (HzPRGs) at z\ 2.2È2.6 is presented. Strong forbidden lines and Ha emission were detected in all sources ; the data show evidence that the emission lines of the HzPRGs may contribute a substantial fraction (D25%È98%) of their total observed Hand/or K-band light. Diagnostic emission-line ratiosÈ [O ...

ASTRONOMY AND ASTROPHYSICS Deep VLT spectroscopy of the z = 2.49 Radio Galaxy MRC 2104–242 ⋆