33 citations
7 papers
A catalog of quasar properties from the Baryon Oscillation Spectroscopic Survey
Chen Zhi-Fu, Pan Da-Sheng, Pang Ting-Ting +1
Using the quasars with z_em < 0.9 from the Baryon Oscillation Spectroscopic Survey, we measure the spectral characteristics, including continuum and emission lines, around the Hbet…
Collective properties of quasar narrow associated absorption lines
Chen Zhi-Fu, Pan Da-Sheng
This paper statistically investigates the properties of C IV and Mg II narrow absorption lines (NALs) to look for velocity cuts that can well constrain quasar-associated NALs. The…
Narrow absorption lines complex I: one form of broad absorption line
Wei-Jian Lu, Ying-Ru Lin
We discover that some of the broad absorption lines (BALs) are actually a complex of narrow absorption lines (NALs). As a pilot study of this type of BAL, we show this discovery th…
Correlation between the variation of the ionizing continuum and broad absorption lines
Wei-Jian Lu, Ying-Ru Lin, Yi-Ping Qin
In this Letter, we present an analysis of the relation between the variability of broad absorption lines (BALs) and that of the continuum. Our sample is multi-epoch observations of…
Evidence for photoionization-driven variability in narrow absorption lines
Wei-Jian Lu, Ying-Ru Lin, Yi-Ping Qin +10
In this Letter, we report the discovery of a strong correlation between the variability of narrow absorption lines (NALs) and the ionizing continuum from a two-epoch spectra sample…
Narrow C IV absorption doublets on quasar spectra of the Baryon Oscillation Spectroscopic Survey
Chen Zhi-fu, Gu Qiu-sheng, Zhou Luwenjia +1
In this paper, we extend our works of Papers I and II, which are assigned to systematically survey \CIVab\ narrow absorption lines (NALs) with \zabs\zem\ on quasar spectra of…