53 citations · 53 across the 1 of their papers we have counts for
5 papers
Reobservation of Close QSO Groups: The Size Evolution and Shape of Lyman Alpha Forest Absorbers
Arlin Crotts, Yihu Fang
Probing the size and shape of the absorbers that lie in front of the QSOs, in particular the Ly alpha forest, we analyze 785 absorption lines in spectra of five QSOs in close group…
The Size and Nature of Lyman alpha Forest Clouds Probed by QSO Pairs and Groups
Yihu Fang, Robert C. Duncan, Arlin P. S. Crotts +1
We describe a robust Bayesian statistical method for determining Lyman alpha forest cloud sizes in spherical and in thin disk geometries, using absorption in adjacent sightlines to…
A New Method for Measuring the Hi Gunn-Peterson Effect at High Redshift
Yihu Fang, Arlin Crotts
In order to carry out a systematic and thorough measurement of the HI Gunn-Peterson effect at high redshift, a quantitatively testable and repeatable procedure, in particular, a ro…
Spectroscopy of the Double Quasars Q1343+264 Ab: II. the Relationship between Galaxies Ans QSO C~IV Absorption Lines -
Arlin P. S. Crotts, Jill Bechtold, Yihu Fang +1
We present spectra of QSOs 1343+266 A B, covering Ly-beta to C~IV emission at 2Å~resolution, and find further evidence that this system is not gravitationally lensed. We see, howev…
Spectroscopy of the Double Quasars Q1343+266AB: I. a New Determination of the Size of Lyman-Alpha Forest Absorbers
Jill Bechtold, Arlin P. S. Crotts, Robert C. Duncan +1
We have obtained spectroscopy of Q 1343+266 AB, a pair of quasars at redshift z = 2.03 with a projected separation of 9.5 arcseconds. This system is well-suited for probing the Ly-…