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Radio Emission From a $z =$ 10.1 Black Hole in UHZ1

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arxiv 2308.03837 v2 pith:WHT2N5FK submitted 2023-08-07 astro-ph.GA

classification astro-ph.GA
keywords radiouhz1blackemissiontimesarrayfirsthole
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abstract

The recent discovery of a 4 $\times$ 10$^7$ M$_{\odot}$ black hole (BH) in UHZ1 at $z =$ 10.3, just 450 Myr after the big bang, suggests that the seeds of the first quasars may have been direct-collapse black holes (DCBHs) from the collapse of supermassive primordial stars at $z \sim$ 20. This object was identified in James Webb Space Telescope (JWST) NIRcam and Chandra X-ray data, but recent studies suggest that radio emission from such a BH should also be visible to the Square Kilometer Array (SKA) and the next-generation Very Large Array (ngVLA). Here, we present estimates of radio flux densities for UHZ1 from 0.1 - 10 GHz, and find that SKA and ngVLA could detect it with integration times of 10 - 100 hr and just 1 - 10 hr, respectively. It may be possible to see this object with VLA now with longer integration times. The detection of radio emission from UHZ1 would be a first test of exciting new synergies between near infrared (NIR) and radio observatories that could open the era of $z \sim$ 5 - 15 quasar astronomy in the coming decade.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quantum signatures in black hole accretion: Pair production in dynamical magnetic fields

    astro-ph.HE 2025-05 reject novelty 5.0 of 10

    The paper applies Schwinger pair production to toy magnetic field pulses in magnetically arrested disks and predicts detectable 1-3000 MHz synchrotron flux, but internal inconsistencies invalidate the claim.

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