Star formation at the epoch of reionization with CANUCS : the ages of stellar populations in MACS1149-JD1

Bradač, Maruša (avtor), Harshan Thevalil, Anishya (avtor), Martis, Nicholas S. (avtor), Rihtaršič, Gregor (avtor)

We present measurements of stellar populations properties of a $z$ = 9.1 gravitationally lensed galaxy MACS1149-JD1 using deep James Webb Space Telescope NIRISS slitless spectroscopy as well as NIRISS and NIRCam imaging from the CAnadian NIRISS Unbiased Cluster Survey (CANUCS). The galaxy is split into four components. Three magnified ($μ$ ∼ 11) star-forming components are unresolved, giving intrinsic sizes of < 25 pc. In addition, the underlying extended component contains the bulk of the stellar mass, formed the majority of its stars ∼50 Myr earlier than the other three components, and is not the site of the most active star formation currently. The NIRISS and NIRCam resolved photometry does not confirm a strong Balmer break previously seen in Spitzer. The NIRISS grism spectrum has been extracted for the entire galaxy and shows a clear continuum and Lyman break, with no Ly$α$ detected.

• Jezik: Angleški jezik
• Ključne besede: high-redshift galaxies, gravitational lensing, 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: 7 str.
• Številčenje: Vol. 961, no. 1, art. L21
• PID: 20.500.12556/RUL-154284-1f236e93-9dfd-5d69-a6bf-a99570f17eb4
• UDK: 524.8
• ISSN pri članku: 2041-8213
• DOI: 10.3847/2041-8213/ad0e73
• COBISS.SI-ID: 182919427
• Datum objave v RUL: 05.02.2024

Gradivo je del revije

• Naslov: The Astrophysical journal. Letters
• Skrajšan naslov: Astrophys. J. Lett.
• Založnik: American Astronomical Society
• ISSN: 2041-8213
• COBISS.SI-ID: 367233

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.