| Download | - View final version: Star formation at the epoch of reionization with CANUCS: the ages of stellar populations in MACS1149-JD1 (PDF, 1.9 MiB)
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| DOI | Resolve DOI: https://doi.org/10.3847/2041-8213/ad0e73 |
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| Author | Search for: Bradač, MarušaORCID identifier: https://orcid.org/0000-0001-5984-0395; Search for: Strait, VictoriaORCID identifier: https://orcid.org/0000-0002-6338-7295; Search for: Mowla, LamiyaORCID identifier: https://orcid.org/0000-0002-8530-9765; Search for: Iyer, Kartheik G.ORCID identifier: https://orcid.org/0000-0001-9298-3523; Search for: Noirot, Gaël; Search for: Willott, ChrisORCID identifier: https://orcid.org/0000-0002-4201-7367; Search for: Brammer, GabeORCID identifier: https://orcid.org/0000-0003-2680-005X; Search for: Abraham, RobertoORCID identifier: https://orcid.org/0000-0002-4542-921X; Search for: Asada, YoshihisaORCID identifier: https://orcid.org/0000-0003-3983-5438; Search for: Desprez, GuillaumeORCID identifier: https://orcid.org/0000-0001-8325-1742; Search for: Estrada-Carpenter, Vince; Search for: Harshan, AnishyaORCID identifier: https://orcid.org/0000-0001-9414-6382; Search for: Martis, Nicholas S.1ORCID identifier: https://orcid.org/0000-0003-3243-9969; Search for: Matharu, JasleenORCID identifier: https://orcid.org/0000-0002-7547-3385; Search for: Muzzin, Adam; Search for: Rihtaršič, GregorORCID identifier: https://orcid.org/0009-0009-4388-898X; Search for: Sarrouh, Ghassan T. E.ORCID identifier: https://orcid.org/0000-0001-8830-2166; Search for: Sawicki, MarcinORCID identifier: https://orcid.org/0000-0002-7712-7857 |
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| Affiliation | - National Research Council Canada. Herzberg Astronomy and Astrophysics
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| Funder | Search for: European Research Council; Search for: Slovenian National Research Agency; Search for: Space Telescope Science Institute; Search for: Canadian Space Agency; Search for: Natural Sciences and Engineering Research Council of Canada |
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| Format | Text, Article |
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| Subject | high-redshift galaxies; gravitational lensing; reionization |
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| Abstract | 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 Lyα detected. |
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| Publication date | 2024-01-20 |
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| Publisher | American Astronomical Society |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 6228169e-2a34-4273-b74b-55bae948f057 |
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| Record created | 2024-07-30 |
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| Record modified | 2024-08-09 |
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