Resolving the Powerful Radio-loud Quasar at z ̃ 6

Momjian, Emmanuel; Carilli, Christopher L.; Bañados, Eduardo; Walter, Fabian; Venemans, Bram P.

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Resolving the Powerful Radio-loud Quasar at z ̃ 6

MPS-Authors

Momjian, Emmanuel
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Carilli, Christopher L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bañados, Eduardo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Walter, Fabian
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Venemans, Bram P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

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https://ui.adsabs.harvard.edu/abs/2018ApJ...861...86M
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Citation

Momjian, E., Carilli, C. L., Bañados, E., Walter, F., & Venemans, B. P. (2018). Resolving the Powerful Radio-loud Quasar at z ̃ 6. The Astrophysical Journal, 861.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CC1A-9

Abstract

We present high angular resolution imaging (23.9 × 11.3 mas, 138.6 × 65.5 pc) of the radio-loud quasar PSO J352.4034-15.3373 at z = 5.84 with the Very Long Baseline Array (VLBA) at 1.54 GHz. This quasar has the highest radio-to-optical flux density ratio at such a redshift, making it the radio-loudest source known to date at z ̃ 6. The VLBA observations presented here resolve this quasar into multiple components with an overall linear extent of 1.62 kpc (0.″28) and with a total flux density of 6.57 ± 0.38 mJy, which is about half of the emission measured at a much lower angular resolution. The morphology of the source is comparable with either a radio core with a one-sided jet or a compact or a medium-size symmetric object (CSO/MSO). If the source is a CSO/MSO, and assuming an advance speed of 0.2c, then the estimated kinematic age is ̃10⁴ years.