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- W2013972036 abstract "(Abridged for arXiv) We report the discovery of an unusual, extremely dust-rich and metal-strong damped lya absorption system (DLA) at a redshift $z_{a}=2.4596$ toward the quasar SDSS J115705.52+615521.7 (hereafter J1157+6155) with an emission-line redshift $z_{e}=2.5125$. Its neutral hydrogen column density $N_{hi} = 10^{21.8pm0.2}$ cm$^{-2}$ is among the highest values measured in quasar DLAs. The measured metal column density is $N_{ZnII}approx 10^{13.8}$ cm$^{-2}$, which is about 1.5 times larger than the largest value in any previously observed quasar DLAs. The best-fit curve is a MW-like law with a significant broad feature centered around 2175 {AA} in the rest frame of the absorber. The measured extinction $A_V approx 0.92$ mag is unprecedentedly high in quasar DLAs. After applying an extinction correction, the $i$ band absolute magnitude of the quasar is as high as $M_{i} approx -29.4$ mag, placing it one of the most luminous quasars ever known. This discovery is suggestive of the existence of a rare yet important population of dust-rich DLAs with both high metallicities and high column densities, which may have significant impact on the measurement of the cosmic evolution of neutral gas mass density and metallicity." @default.
- W2013972036 created "2016-06-24" @default.
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- W2013972036 date "2012-11-01" @default.
- W2013972036 modified "2023-10-16" @default.
- W2013972036 title "A METAL-STRONG AND DUST-RICH DAMPED Lyα ABSORPTION SYSTEM TOWARD THE QUASAR SDSS J115705.52+615521.7" @default.
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- W2013972036 doi "https://doi.org/10.1088/0004-637x/760/1/42" @default.
- W2013972036 hasPublicationYear "2012" @default.
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