2.1k citations · 17.8k across the 98 of their papers we have counts for
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astro-ph2005★ 93 cited
The H I opacity of the intergalactic medium at redshifts 1.6 < z < 3.2
David Kirkman, David Tytler, Nao Suzuki +8
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.…
astro-ph2005★ 1 cited
Quasar Spectrum Classification with PCA - II: Introduction of Five Classes, Artificial Quasar Spectrum, the Mean Flux Correction Factor dF,and the Identification of Emission Lines in the Ly alpha Forest
Nao Suzuki
We investigate the variety in quasar UV spectra (1020-1600A) with emphasis on the weak emission lines in the Ly alpha forest region using principal component analysis (PCA). This p…