Dissecting cold gas in a high-redshift galaxy using a lensed background quasar

J. -K. Krogager, P. Noterdaeme, J. M. O'Meara +9

We present a study of cold gas absorption from a damped Lyman-$\alpha$ absorber (DLA) at redshift $z_{\mathrm{abs}}=1.946$ towards two lensed images of the quasar J144254.78+405535.5 at reds…