most citedQuasar 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

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astro-ph2006★ 1 cited

Probing Quasar Outflows with Intrinsic Narrow Absorption Lines

T. Misawa, M. Eracleous, J. C. Charlton +5

We present statistical and monitoring results of narrow absorption lines that are physically related to quasars (i.e., intrinsic NALs). We use Keck/HIRES spectra of 37 optically br…

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…