JWST NIRSpec spectroscopy of the triply lensed z = 10.17 galaxy MACS0647–JD

Hsiao, Yu-Yang Tiger (avtor), Abdurro'uf (avtor), Coe, Dan (avtor), Larson, Rebecca L. (avtor), Jung, Intae (avtor), Bradač, Maruša (avtor)

We present JWST/NIRSpec prism spectroscopy of MACS0647−JD, a triply lensed z ∼ 11 candidate discovered in Hubble Space Telescope imaging and spatially resolved by JWST imaging into two components, A and B. Spectroscopy of component A yields a spectroscopic redshift z = 10.17 based on seven detected emission lines: C III] λλ1907, 1909, [O II] λ3727, [Ne III] λ3869, [Ne III] λ3968, Hδ λ4101, Hγ λ4340, and [O III] λ4363. These are the second-most distant detections of these emission lines to date, in a galaxy observed just 460 million years after the Big Bang. Based on observed and extrapolated line flux ratios we derive a gas-phase metallicity 12 + log (O/H) ∼ 7.5–8.0, or Z ∼ (0.06–0.2) Ze, ionization parameter log(U) = −1.9 ± 0.2, and an ionizing photon production efficiency log 25.2 ± 0.2 erg-1 Hz. The spectrum has a softened Lyα break, evidence for a strong Lyα damping wing. The Lyα damping wing also suppresses the F150W photometry, explaining the slightly overestimated photometric redshift z = 10.6 ± 0.3. MACS0647−JD has a stellar mass log(M/Me) = 8.1 ± 0.3, including ∼6 × 10 7 Me in component A, most of which formed recently (within ∼20 Myr) with a star formation rate ∼ 2 ± 1 Me yr−1 , all within an effective radius 70 ± 24 pc. Spectroscopy of a fainter companion galaxy C separated by a distance of ∼ 3 kpc reveals a Lyman break consistent with z ∼ 10.17. MACS0647−JD is likely the most distant galaxy merger known.

• Jezik: Angleški jezik
• Ključne besede: galaxies, high-redshift galaxies, early universe, strong gravitational lensing, galaxy spectroscopy, reionization
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 16 str.
• Številčenje: Vol. 973, art. A8
• PID: 20.500.12556/RUL-162192
• UDK: 524.8
• ISSN pri članku: 1538-4357
• DOI: 10.3847/1538-4357/ad5da8
• COBISS.SI-ID: 208089091
• Datum objave v RUL: 19.09.2024

Gradivo je del revije

• Naslov: The Astrophysical journal
• Skrajšan naslov: Astrophys. j.
• Založnik: University of Chicago Press for the American Astronomical Society
• ISSN: 1538-4357
• COBISS.SI-ID: 515079705

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: N1-0238-2022
• Naslov: Raziskave kozmične zore z James Webb vesoljskim teleskopom

• Financer: NSF - National Science Foundation
• Številka projekta: 2109066
• Naslov: NSF-BSF: Galaxies in the Reionization Era