CO, H2O, H2O+ line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales

Understand

Using ALMA, we report high angular-resolution observations of the redshift z=3.63 galaxy, G09v1.97, one of the most luminous strongly lensed galaxies discovered by the H-ATLAS survey.

• We present 0"2-0"4 resolution images of the rest-frame 188 and 419$\mu$m dust continuum and the CO(6-5), H2O(211-202) and J=2 H2O+ line emission.
• We also report the detection of H$_2^{18}$O in this source.
• The dust continuum and molecular gas emission are resolved into a nearly complete ~1"5 diameter Einstein ring plus a weaker image in the center, which is caused by a special dual deflector lensing configuration.