The z=7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger
  We present ALMA 0.28"x0.20" (1.4kpc x 1.0kpc) resolution observations of the
[CII] 158um line and underlying dust continuum in the host galaxy of the most
distant quasar currently known, ULAS J1342+0928 at z=7.5413. Both the [CII] and
continuum are detected and spatially resolved. The [CII] line is ~1.5 times
more extended than the continuum emission, showing an elongated and complex
structure of approximately 3.2kpc x 6.4kpc. Two separate peaks are clearly seen
(>6sigma each) in three 100 km/s width [CII] channel maps. The velocity field
of the [CII] gas does not show evidence of a coherent rotation field but rather
chaotic motion, reminiscent of an on-going merger.
