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Optical spectroscopy of Arp220: the star formation history of the closest ULIRG
J. Rodriguez Zaurin, C. N. Tadhunter, R. M. Gonzalez Delgado
We present optical spectra of the merging system Arp 220,taken with the William Herschel Telescope(WHT) on La Palma. These data were taken with the aim of investigating the evoluti…
The dark nature of GRB 051022 and its host galaxy
A. J. Castro-Tirado, M. Bremer, S. McBreen +17
We present multiwavelength (X-ray/optical/near-infrared/millimetre) observations of GRB 051022 between 2.5 hours and ~1.15 yr after the event. It is the most intense gamma-ray burs…
The properties of the young stellar populations in powerful radio galaxies at low and intermediate redshifts
J. Holt, C. N. Tadhunter, R. M. Gonzalez Delgado +5
Abridged. We present high-quality optical spectra for 12 powerful radio sources at low and intermediate redshifts (z < 0.7) that show evidence for a substantial UV excess. These da…
VIMOS-VLT spectroscopy of the giant Ly-alpha nebulae associated with three z~2.5 radio galaxies
M. Villar-Martin, S. F. Sanchez, A. Humphrey +4
The morphological and spectroscopic properties of the giant (>60 kpc) Ly-alpha nebulae associated with three radio galaxies at z~2.5 (MRC 1558-003, MRC 2025-218 and MRC 0140-257) h…
The heating mechanism for the warm/cool dust in powerful, radio-loud AGN
C. Tadhunter, D. Dicken, J. Holt +7
The uncertainty surrounding the nature of the heating mechanism for the dust that emits at mid- to far-IR (MFIR) wavelengths in active galaxies limits our understanding of the link…