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An empirical approach to selecting the first growing black hole seeds with JWST/NIRCam

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arxiv 2208.02822 v2 pith:BDV5324Y submitted 2022-08-04 astro-ph.GA astro-ph.HE

An empirical approach to selecting the first growing black hole seeds with JWST/NIRCam

classification astro-ph.GA astro-ph.HE
keywords blackcolorholesjwstcompletenessgalaxiesgrowingnircam
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The James Webb Space Telescope (JWST) will have the sensitivity to detect early low-mass black holes as they transition from "seeds" to supermassive black holes (BHs). Based on the JAGUAR mock catalog of galaxies, we present a clean color selection that takes advantage of the unique UV slope of accreting supermassive black holes with relatively low mass and high accretion rates. We show for a range of host stellar masses that those galaxies hosting $\sim 10^{6} M_{\odot}$ BHs radiating at >10% of their Eddington luminosity separate in color space from inactive systems. Here we propose a set of 3-band, 2-color selection boxes (with 90% completeness; 90% purity; balanced purity/completeness) with JWST/NIRCam to identify the most promising growing BH candidates at $z \sim 7-10$.

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