VLA detects CO(1 0) emission in the z = 3.65 quasar SDSS J160705+533558
Artikel i vetenskaplig tidskrift, 2022

We present CO(1 0) observations of the high-redshift quasar SDSS J160705+533558 (z=3.653) using the Karl G. Jansky Very Large Array (VLA). We detect CO emission associated with the quasar and at ∼16.8 kpc projected distance from it, separated by ∼800kmas-1 in velocity. The total molecular gas mass of this system is ∼5×1010 M˙. By comparing our CO detections with previous submillimetre (submm) observations of the source, an offset between the different emission components is revealed: the peak of the submm emission is offset from the quasar and from the CO companion detected in our VLA data. To explain our findings, we propose a scenario similar to that for the Antennae galaxies: SDSS J160705+533558 might be a merger system in which the quasar and the CO companion are the merging galaxies, whose interaction resulted in the formation of a dusty, star-forming overlap region between the galaxies that is dominant at the submm wavelengths.

Galaxies: active

Quasars: individual: SDSS J160705+533558

Galaxies: evolution

Galaxies: high-redshift


Judit Fogasy

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

Magyar Tudomanyos Akademia

Kirsten Kraiberg Knudsen

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

Eskil Varenius

Chalmers, Rymd-, geo- och miljövetenskap, Geovetenskap och fjärranalys

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 660 A60


Astronomi, astrofysik och kosmologi



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