TY - JOUR
T1 - The Completed Sloan Digital Sky Survey IV Extended Baryon Oscillation Spectroscopic Survey
T2 - The Damped Lyα Systems Catalog
AU - Chabanier, Solene
AU - Etourneau, Thomas
AU - Le Goff, Jean Marc
AU - Rich, James
AU - Stermer, Julianna
AU - Abolfathi, Bela
AU - Font-Ribera, Andreu
AU - Gonzalez-Morales, Alma X.
AU - De La Macorra, Axel
AU - Pérez-Rafols, Ignasi
AU - Petitjean, Patrick
AU - Pieri, Matthew M.
AU - Ravoux, Corentin
AU - Rossi, Graziano
AU - Schneider, Donald P.
N1 - Publisher Copyright:
© 2022. The Author(s). Published by the American Astronomical Society.
PY - 2022/1
Y1 - 2022/1
N2 - We present the characteristics of the damped Lyα (DLA) systems found in data release DR16 of the extended Baryon Oscillation Spectroscopic Survey of the Sloan Digital Sky Survey. The DLAs were identified using the convolutional neural network of Parks et al. (2018). A total of 117,458 absorber candidates were found with 2 ≤ z DLA ≤ 5.5 and 19.7 ≤ log(N(HI)/cm-2) ≤ 22, including 57,136 DLA candidates with log(N(HI)/cm-2)≥ 20.3. Mock quasar spectra were used to estimate the DLA detection efficiency and the purity of the resulting catalog. Restricting the quasar sample to bright forests, i.e., those with mean forest fluxes f¯ > 2 × 10-19 W m-2 nm-1, the efficiency and purity are greater than 90% for DLAs with column densities in the range 20.1 ≤ log(N(HI)/cm-2)≤ 22.
AB - We present the characteristics of the damped Lyα (DLA) systems found in data release DR16 of the extended Baryon Oscillation Spectroscopic Survey of the Sloan Digital Sky Survey. The DLAs were identified using the convolutional neural network of Parks et al. (2018). A total of 117,458 absorber candidates were found with 2 ≤ z DLA ≤ 5.5 and 19.7 ≤ log(N(HI)/cm-2) ≤ 22, including 57,136 DLA candidates with log(N(HI)/cm-2)≥ 20.3. Mock quasar spectra were used to estimate the DLA detection efficiency and the purity of the resulting catalog. Restricting the quasar sample to bright forests, i.e., those with mean forest fluxes f¯ > 2 × 10-19 W m-2 nm-1, the efficiency and purity are greater than 90% for DLAs with column densities in the range 20.1 ≤ log(N(HI)/cm-2)≤ 22.
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U2 - 10.3847/1538-4365/ac366e
DO - 10.3847/1538-4365/ac366e
M3 - Article
AN - SCOPUS:85123702716
SN - 0067-0049
VL - 258
JO - Astrophysical Journal, Supplement Series
JF - Astrophysical Journal, Supplement Series
IS - 1
M1 - 18
ER -