| Title: |
A CEERS Discovery of an Accreting Supermassive Black Hole 570 Myr after the Big Bang: Identifying a Progenitor of Massive z > 6 Quasars |
| Authors: |
Larson, RL; Finkelstein, SL; Kocevski, DD; Hutchison, TA; Trump, JR; Haro, PA; Bromm, V; Cleri, NJ; Dickinson, M; Fujimoto, S; Kartaltepe, JS; Koekemoer, AM; Papovich, C; Pirzkal, N; Tacchella, S; Zavala, JA; Bagley, M; Behroozi, P; Champagne, JB; Cole, JW; Jung, I; Morales, AM; Yang, G; Zhang, H; Zitrin, A; Amorín, RO; Burgarella, D; Casey, CM; Chávez Ortiz, ÓA; Cox, IG; Chworowsky, K; Fontana, A; Gawiser, E; Grazian, A; Grogin, NA; Harish, S; Hathi, NP; Hirschmann, M; Holwerda, BW; Juneau, S; Leung, GCK; Lucas, RA; McGrath, EJ; Pérez-González, PG; Rigby, JR; Seillé, LM; Simons, RC; De La Vega, A; Weiner, BJ; Wilkins, SM; Yung, LYA |
| Publisher Information: |
American Astronomical Society; //dx.doi.org/10.3847/2041-8213/ace619; Astrophysical Journal Letters |
| Publication Year: |
2023 |
| Collection: |
Apollo - University of Cambridge Repository |
| Subject Terms: |
5101 Astronomical Sciences; 51 Physical Sciences |
| Description: |
Abstract We report the discovery of an accreting supermassive black hole at z = 8.679. This galaxy, denoted here as CEERS_1019, was previously discovered as a Lyα-break galaxy by Hubble with a Lyα redshift from Keck. As part of the Cosmic Evolution Early Release Science (CEERS) survey, we have observed this source with JWST/NIRSpec, MIRI, NIRCam, and NIRCam/WFSS and uncovered a plethora of emission lines. The Hβ line is best fit by a narrow plus a broad component, where the latter is measured at 2.5σ with an FWHM ∼1200 km s−1. We conclude this originates in the broadline region of an active galactic nucleus (AGN). This is supported by the presence of weak high-ionization lines (N V, N IV], and C III]), as well as a spatial point-source component. The implied mass of the black hole (BH) is log (M BH/M ⊙) = 6.95 ± 0.37, and we estimate that it is accreting at 1.2 ± 0.5 times the Eddington limit. The 1–8 μm photometric spectral energy distribution shows a continuum dominated by starlight and constrains the host galaxy to be massive (log M/M⊙ ∼9.5) and highly star-forming (star formation rate, or SFR ∼ 30 M⊙ yr−1; log sSFR ∼ − 7.9 yr−1). The line ratios show that the gas is metal-poor (Z/Z ⊙ ∼ 0.1), dense (n e ∼ ... |
| Document Type: |
article in journal/newspaper |
| File Description: |
text/xml; application/pdf |
| Language: |
English |
| Relation: |
https://www.repository.cam.ac.uk/handle/1810/355645 |
| Availability: |
https://www.repository.cam.ac.uk/handle/1810/355645 |
| Accession Number: |
edsbas.348C8B12 |
| Database: |
BASE |