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Properties of Ellipticity Correlation with Atmospheric Structure from Gemini South
S. Asztalos, W. H. de Vries, L. J Rosenberg +5
Cosmic shear holds great promise for a precision independent measurement of , the mass density of the universe relative to the critical density. The signal is expected to b…
The Near-Infrared Extinction Law in Regions of High Av
T. J. T. Moore, S. L. Lumsden, N. A. Ridge +1
We present a spectroscopic study of the shape of the dust-extinction law between 1.0 and 2.2um towards a set of nine ultracompact HII regions with Av > 15 mag. We find some evidenc…
Gemini Near Infrared Spectrograph Observations of a Red Star Forming Galaxy at z=2.225: Evidence for Shock-Ionization due to a Galactic Wind
P. G. van Dokkum, M. Kriek, B. Rodgers +2
Recent studies have shown that K-luminous galaxies at 2<z<2.5 have high Halpha line widths and high [NII]/Halpha ratios. If these lines arise from photo-ionization by massive stars…
Helium and Hydrogen Line Ratios and The Stellar Content of Compact HII Regions
S. L. Lumsden, P. J. Puxley, M. G. Hoare +2
We present observations and models of the behaviour of the HI and HeI lines between 1.6 and 2.2um in a small sample of compact HII regions. As in our previous papers on planetary n…