Identification of Mgll Absorption Line Systems from SDSS Quasar Catalogue
The quasar absorption lines are crucial to our understanding of the Universe since the absorption lines provide a wealth of information on the gaseous Universe from high redshift to present day. The absorption lines can also allow us to probe the metallicity and ionization state of the gas (Wild et al. 2008). Owing to the advent of large spectroscopic surveys such as the Sloan Digital Sky Survey (SDSS; York et al. 2000), tens of thousands of quasar absorption lines can be identified. However, it is very difficult to identify absorption line systems, especially for the weak absorption line system and the spectrum of low signal-to-noise ratio. In the most previous works, the identification of absorption line systems were mainly completed by two steps: estimating the continuum using the principal component analysis (PCA) and auto-identifying the absorption line systems by computer programs (see, e.g., Lundgren et al. 2009). In this work, we provide our method for identifying the Mgll absorption line systems.
W.-R.Huang W.Zhou Z.-F.Chen Y.-P.Qin M.-S.Li R.-H.Liao W.-W.He F.Han Y.-Q.Zhong J.-Q.Gan
School of Physics & Electronic Engineering,Guang Zhou University,Guangzhou,Peoples Republic of Chin School of Physics & Electronic Engineering,Guang Zhou University,Guangzhou,Peoples Republic of Chin
国际会议
International Conference of Multiwavelength Variability of Blazars(Blazar多波段光变国际学术会议)
广州
英文
277-280
2010-09-20（万方平台首次上网日期，不代表论文的发表时间）