814 citations · 3.1k across the 48 of their papers we have counts for
4 papers · 2 filters
Galaxies at Redshift ~0.5 Around Three Closely Spaced Quasar Sightlines
Neil H. M. Crighton, Simon L. Morris, Jill Bechtold +4
We examine the relationship between galaxies and the intergalactic medium at z < 1 using a group of three closely spaced background QSOs with z_em ~1 observed with the Hubble Space…
Host Galaxies of z=4 Quasars
K. K. McLeod, Jill Bechtold
We have undertaken a project to investigate the host galaxies and environments of a sample of quasars at z~4. In this paper, we describe deep near-infrared imaging of 34 targets us…
An Observational Determination of the Proton to Electron Mass Ratio in the Early Universe
Rodger I. Thompson, Jill Bechtold, John H. Black +6
In an effort to resolve the discrepancy between two measurements of the fundamental constant mu, the proton to electron mass ratio, at early times in the universe we reanalyze the…
Are the Variations in Quasar Optical Flux Driven by Thermal Fluctuations?
Brandon C. Kelly, Jill Bechtold, Aneta Siemiginowska
We analyze a sample of optical light curves for 100 quasars, 70 of which have black hole mass estimates. Our sample is the largest and broadest used yet for modeling quasar variabi…