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19962026
Showing 2001Show all

55 papers · 1 filter

astro-ph2001★ 15 cited

The Patchy Accretion Disc in HT Cassiopeiae

Sonja Vrielmann, Frederic V. Hessman, Keith Horne

We have reconstructed the temperatures and surface densities in the quiescent accretion disc in HT Cas by performing a "Physical Parameter Eclipse Mapping" analysis of archival UBV…

astro-ph2001★ 218 cited

The 2dF Galaxy Redshift Survey: The amplitudes of fluctuations in the 2dFGRS and the CMB, and implications for galaxy biasing

Ofer Lahav, Sarah L. Bridle, Will J. Percival +26

We compare the amplitudes of fluctuations probed by the 2dF Galaxy Redshift Survey and by the latest measurements of the Cosmic Microwave Background anisotropies. By combining the…

astro-ph2001★ 631 cited

The 2dF Galaxy Redshift Survey: The bias of galaxies and the density of the Universe

Licia Verde, Alan F. Heavens, Will J. Percival +27

We compute the bispectrum of the 2dF Galaxy Redshift Survey (2dFGRS) and use it to measure the bias parameter of the galaxies. This parameter quantifies the strength of clustering…

astro-ph2001★ 84 cited

The brown dwarf desert as a consequence of orbital migration

Philip J. Armitage, Ian A. Bonnell

We show that the dearth of brown dwarfs in short-period orbits around Solar-mass stars - the brown dwarf desert - can be understood as a consequence of inward migration within an e…

astro-ph2001★ 37 cited

Profile Shapes for Optically Thick X-ray Emission Lines from Stellar Winds

R. Ignace, K. G. Gayley

We consider the consequences of appreciable line optical depth for the profile shape of X-ray emission lines formed in stellar winds. The hot gas is thought to arise in distributed…

astro-ph2001★ 103 cited

Infrared Signatures of Protoplanetary Disk Evolution

Kenneth Wood, C. J. Lada, J. E. Bjorkman +3

We investigate the observational signatures of a straightforward evolutionary scenario for protoplanetary disks in which the disk mass of small (50 micron) particles decreases homo…