Detection of Diffuse Interstellar Bands in the z = 0.5 Damped Lyα System toward AO 0235+164*

  title={Detection of Diffuse Interstellar Bands in the z = 0.5 Damped Ly$\alpha$ System toward AO 0235+164*},
  author={Brian Andrew York and Sara L. Ellison and Brandon L. Lawton and Christopher W. Churchill and Theodore P. Snow and Rachel A. Johnson and Sean G. Ryan},
  journal={The Astrophysical Journal},
We report the first detection of the 5705 and 5780 A diffuse interstellar bands (DIBs) in a moderate-redshift damped Lyα (DLA) system. We measure a rest-frame equivalent width of 63.2 ± 8.7 mA for the 5705 A feature and 216 ± 9 mA for the 5780 A feature in the zabs = 0.524 DLA toward AO 0235+164 and derive limits for the equivalent widths of the bands at 5797, 6284, and 6613 A. The equivalent width of the 5780 A band is lower than would be expected based on the Galactic correlation of DIB… 

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