论文标题
通过高斯工艺检测SDSS DR12中的每个频谱的多个DLA
Detecting Multiple DLAs per Spectrum in SDSS DR12 with Gaussian Processes
论文作者
论文摘要
我们使用高斯工艺（GPS）提出了自动化技术的修订版，以检测沿Quasar（QSO）视线的阻尼Lyman-$α$吸收器（DLAS）。主要的改进是允许我们的高斯工艺管道沿单个视线检测多个DLA。我们的DLA检测是通过改进的模型正规化的，用于从Lyman-$α$森林吸收的模型，从而改善了高红移的性能。我们还引入了一个未解决的sub-dla的模型，该模型可减少吸收剂的错误分类，而无需检测到阻尼机翼。 We compare our results to those of two different large-scale DLA catalogues and provide a catalogue of the processed results of our Gaussian process pipeline using 158 825 Lyman-$α$ spectra from SDSS data release 12. We present updated estimates for the statistical properties of DLAs, including the column density distribution function (CDDF), line density ($dN/dX$), and neutral hydrogen density （$ω_ {\ textrm {dla}} $）。
We present a revised version of our automated technique using Gaussian processes (GPs) to detect Damped Lyman-$α$ absorbers (DLAs) along quasar (QSO) sightlines. The main improvement is to allow our Gaussian process pipeline to detect multiple DLAs along a single sightline. Our DLA detections are regularised by an improved model for the absorption from the Lyman-$α$ forest which improves performance at high redshift. We also introduce a model for unresolved sub-DLAs which reduces mis-classifications of absorbers without detectable damping wings. We compare our results to those of two different large-scale DLA catalogues and provide a catalogue of the processed results of our Gaussian process pipeline using 158 825 Lyman-$α$ spectra from SDSS data release 12. We present updated estimates for the statistical properties of DLAs, including the column density distribution function (CDDF), line density ($dN/dX$), and neutral hydrogen density ($Ω_{\textrm{DLA}}$).
