37 citations · 137 across the 5 of their papers we have counts for
5 papers
HeII emission in Lyman-alpha nebulae: AGN or cooling radiation?
C. Scarlata, J. Colbert, H. I. Teplitz +6
We present a study of an extended Lyman-alpha (Lya) nebula located in a known overdensity at z~2.38. The data include multiwavelength photometry covering the rest-frame spectral ra…
The Low-Redshift Lyman Alpha Forest toward PKS 0405-123
G. M. Williger, S. R. Heap, R. J. Weymann +5
We present STIS 7km/s resolution data of the Ly-a forest toward PKS0405-123 (z=0.574). We make two samples. The strong sample (60 systems) has column density logNHI>13.3 over 0.002…
Large Scale Structure at z=1.2 Outlined by MgII Absorbers
G. M. Williger, L. E. Campusano, R. G. Clowes +1
The largest known structure in the high redshift universe is mapped by at least 18 quasars and spans ~5 deg x 2.5 deg on the sky, with a quasar spatial overdensity of 6-10 times ab…
Evidence for Large Scale Structure in the Lyman alpha Forest at z>2.6
G. M. Williger, A. Smette, C. Hazard +2
We present a search for spatial and redshift correlations in a 2 A resolution spectroscopic survey of the Lyman alpha forest at 2.15 < z < 3.37 toward ten QSOs concentrated within…
Large-scale structure in the Lyman-alpha forest II: analysis of a group of ten QSOs
J. Liske, J. K. Webb, G. M. Williger +2
The spatial distribution of Ly-alpha forest absorption systems towards ten QSOs has been analysed to search for large-scale structure over the redshift range 2.2 < z < 3.4. The QSO…