An Intercomparison Study of Two Proximate Damped Ly$\alpha$ Systems with Residual Flux upon the Ly$\alpha$ Absorption Trough toward Quasars

29 Apr 2018 Xie Xiaoyi Zhou Hongyan Pan Xiang Jiang Peng Shi Xiheng Ji Tuo Zhang Shaohua Wu Shengmiao Zhong Zhihao

In this paper, we present an intercomparison study of two quasars, SDSS J145618.32+340037.2 and SDSS J215331.50-025514.1, which have proximate damped Lya systems (PDLAs) with residual flux upon the Lya absorption trough. Though they both have residual flux as luminous as $10^{43}erg/s$, their PDLAs are quite different in, e.g., HI column density, metal line absorption strength, high-ionization absorption lines as well as residual flux strength... (read more)

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Categories


  • ASTROPHYSICS OF GALAXIES
  • COSMOLOGY AND NONGALACTIC ASTROPHYSICS