Metal Absorption Systems in Spectra of Pairs of QSOs (2007)
Tytler, David, Gleed, Mark, Melis, Carl, Chapman, Angela, Kirkman, David, Lubin, Dan, ...
We present the first large sample of absorption systems in paired QSOs consisting of 691 absorption systems in the spectra of 310 QSOs including 170 pairings. All these absorption systems have metal...
The H I opacity of the intergalactic medium at redshifts 1.6 < z < 3.2 (2005)
Kirkman, David, Tytler, David, Suzuki, Nao, Melis, Carl, Hollywood, Susan, James, Kory, ...
We use high quality echelle spectra of 24 QSOs to provide a calibrated measurement of the total amount of Lyman-alpha forest absorption (DA) over the redshift range 2.2 < z < 3.2. Our measurement of...