2025ApJ...983L...8W -
Astrophys. J., 983, L8 (2025/April-2)
Kiloparsec-scale Alignment of a Radio Jet with Cool Gas and Dust in a z ∼ 6 Quasar.
WALTER F., BANADOS E., CARILLI C., NEELEMAN M., CONNOR T., DECARLI R., FARINA E.P., KHUSANOVA Y., MAZZUCCHELLI C., MEYER R., MOMJIAN E., RIX H.-W., ROJAS-RUIZ S. and VENEMANS B.
Abstract (from CDS):
We present high-angular-resolution (0$\mathop{.}\limits^{\unicode{x02033}}$068, ∼400 pc) Atacama Large Millimeter/submillimeter Array (ALMA) imaging of the [C II] line and dust continuum emission of PSO J352.4034-15.3373, a radio-loud quasar at z = 5.83. The observations reveal a remarkably close match between the orientation of the [C II] and thermal dust emission mapped by ALMA and radio synchrotron emission of a radio jet previously mapped by the Very Long Baseline Array. This narrow alignment extends over ∼4 kpc, reminiscent of the well-studied “alignment effect” in lower-redshift radio galaxies. The [C II] kinematics show a linear increase in velocity with galactocentric radii up to ∼200 km s–1 at r = 2 kpc, consistent with bulk motions within the galaxy potential, and not relativistic jet motions. The kinematics and respective morphologies are consistent with a picture in which the relativistic jet injects energy into the interstellar medium (potentially leading to subsequent star formation), giving rise to the observed alignment and significant (≳100 km s–1) [C II] velocity dispersion within the host galaxy on kiloparsec scales. Indeed, the astonishingly close alignment and narrow linearity of the radio jet with the [C II] and dust emission are hard to conceive without some fundamental relationship between the two.
Abstract Copyright:
© 2025. The Author(s). Published by the American Astronomical Society.
Journal keyword(s):
Quasars - Reionization - Interstellar medium
Simbad objects:
4
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