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The UKIRT Infrared Deep Sky Survey and the search for the most distant quasars
Daniel J. Mortlock, Mitesh Patel, Stephen J. Warren +5
The UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) has the necessary combination of filters (Y, J, H and K), depth (Y <~ 20.2) and area coverage (~4000 deg^2) to d…
Discovery of a redshift 6.13 quasar in the UKIRT Infrared Deep Sky Survey
D. J. Mortlock, M. Patel, S. J. Warren +10
Optical and near-infrared (NIR) spectra are presented for ULAS J131911.29+095951.4 (hereafter ULAS J1319+0950), a new redshift z = 6.127 +/- 0.004 quasar discovered in the Third Da…
Post-Red Supergiants
Rene Oudmaijer, Ben Davies, Willem-Jan de Wit +1
The yellow hypergiants are found in a stage between the massive Red Supergiants and the Wolf-Rayet stars. This review addresses current issues concerning the evolution of massive s…
Spectropolarimetry of the Massive Post-Red Supergiants IRC +10420 and HD 179821
M. Patel, R. D. Oudmaijer, J. S. Vink +5
We present medium resolution spectropolarimetry and long term photo-polarimetry of two massive post-red supergiants, IRC +10420 and HD 179821. The data provide new information on t…