The z=7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger. (arXiv:1909.00027v1 [astro-ph.GA])

The z=7.54 Quasar ULAS J1342+0928 Is Hosted by a Galaxy Merger. (arXiv:1909.00027v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Banados_E/0/1/0/all/0/1">Eduardo Banados</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Novak_M/0/1/0/all/0/1">Mladen Novak</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Neeleman_M/0/1/0/all/0/1">Marcel Neeleman</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Walter_F/0/1/0/all/0/1">Fabian Walter</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Decarli_R/0/1/0/all/0/1">Roberto Decarli</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Venemans_B/0/1/0/all/0/1">Bram P. Venemans</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mazzucchelli_C/0/1/0/all/0/1">Chiara Mazzucchelli</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Carilli_C/0/1/0/all/0/1">Chris Carilli</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wang_F/0/1/0/all/0/1">Feige Wang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fan_X/0/1/0/all/0/1">Xiaohui Fan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Farina_E/0/1/0/all/0/1">Emanuele P. Farina</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Rix_H/0/1/0/all/0/1">Hans-Walter Rix</a>

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.

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