The map was created by using faint background galaxies as light sources, against which gas could be seen by the characteristic absorption features of hydrogen. (keckobservatory.org)
Right panel: The ratio of observed - to - true transit depths at a handful of specific wavelengths where molecular absorption features appear. (aasnova.org)
We attribute this absorption... ▽ More We report the detection of several molecular gas - phase and ice absorption features in three photometrically - selected young stellar object (YSO) candidates in the central 280 pc of the Milky Way. (arxiv.org)