Details

Autor(en) / Beteiligte

• Larson, Rebecca L.
• Finkelstein, Steven L.
• Kocevski, Dale D.
• Hutchison, Taylor A.
• Trump, Jonathan R.
• Arrabal Haro, Pablo
• Bromm, Volker
• Cleri, Nikko J.
• Dickinson, Mark
• Fujimoto, Seiji
• Kartaltepe, Jeyhan S.
• Koekemoer, Anton M.
• Papovich, Casey
• Pirzkal, Nor
• Tacchella, Sandro
• Zavala, Jorge A.
• Bagley, Micaela
• Behroozi, Peter
• Champagne, Jaclyn B.
• Cole, Justin W.
• Jung, Intae
• Morales, Alexa M.
• Yang, Guang
• Zhang, Haowen
• Zitrin, Adi
• Amorín, Ricardo O.
• Burgarella, Denis
• Casey, Caitlin M.
• Chávez Ortiz, Óscar A.
• Cox, Isabella G.
• Chworowsky, Katherine
• Fontana, Adriano
• Gawiser, Eric
• Grazian, Andrea
• Grogin, Norman A.
• Harish, Santosh
• Hathi, Nimish P.
• Hirschmann, Michaela
• Holwerda, Benne W.
• Juneau, Stéphanie
• Leung, Gene C. K.
• Lucas, Ray A.
• McGrath, Elizabeth J.
• Pérez-González, Pablo G.
• Rigby, Jane R.
• Seillé, Lise-Marie
• Simons, Raymond C.
• de la Vega, Alexander
• Weiner, Benjamin J.
• Wilkins, Stephen M.
• Yung, L. Y. Aaron

Titel

A CEERS Discovery of an Accreting Supermassive Black Hole 570 Myr after the Big Bang: Identifying a Progenitor of Massive z > 6 Quasars

Ist Teil von

• Astrophysical journal. Letters, 2023-08, Vol.953 (2), p.L29

Ort / Verlag

Austin: The American Astronomical Society

Erscheinungsjahr

2023

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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 Ly α -break galaxy by Hubble with a Ly α 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 H β line is best fit by a narrow plus a broad component, where the latter is measured at 2.5 σ 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 μ m 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 ∼ 10 3 cm −3 ), and highly ionized (log U ∼ − 2.1). We use this present highest-redshift AGN discovery to place constraints on BH seeding models and find that a combination of either super-Eddington accretion from stellar seeds or Eddington accretion from very massive BH seeds is required to form this object.