The Identification of a Dusty Multiarm Spiral Galaxy at <i>z </i>=3.06 with JWST and ALMA

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dc.contributor.authorWu, Yunjing
dc.contributor.authorCai, Zheng
dc.contributor.authorSun, Fengwu
dc.contributor.authorBian, Fuyan
dc.contributor.authorLin, Xiaojing
dc.contributor.authorLi, Zihao
dc.contributor.authorLi, Mingyu
dc.contributor.authorBauer, Franz E.
dc.contributor.authorEgami, Eiichi
dc.contributor.authorFan, Xiaohui
dc.contributor.authorGonzalez-Lopez, Jorge
dc.contributor.authorLi, Jianan
dc.contributor.authorWang, Feige
dc.contributor.authorYang, Jinyi
dc.contributor.authorZhang, Shiwu
dc.contributor.authorZou, Siwei
dc.date.accessioned2025-01-20T20:19:31Z
dc.date.available2025-01-20T20:19:31Z
dc.date.issued2023
dc.description.abstractSpiral arms serve crucial purposes in star formation and galaxy evolution. In this paper, we report the identification of "A2744-DSG-z3," a dusty, multiarm spiral galaxy at z = 3.059 using the James Webb Space Telescope (JWST) NIRISS imaging and grism spectroscopy. A2744-DSG-z3 was discovered as a gravitationally lensed submillimeter galaxy with the Atacama Large Millimeter/submillimeter Array (ALMA). This is the most distant stellar spiral structure seen thus far, consistent with cosmological simulations that suggest z approximate to 3 as the epoch when spirals emerge. Thanks to the gravitational lensing and excellent spatial resolution of JWST, the spiral arms are resolved with a spatial resolution of approximate to 290 pc. Based on spectral energy distribution fitting, the spiral galaxy has a delensed star formation rate of 85 +/- 30 M (circle dot) yr(-1), and a stellar mass of approximate to 10(10.6) M (circle dot), indicating that A2744-DSG-z3 is a main-sequence galaxy. After fitting the spiral arms, we find a stellar effective radius (R (e,star)) of 5.0 +/- 1.5 kpc. Combining with ALMA measurements, we find that the effective radii ratio between dust and stars is approximate to 0.4, similar to those of massive star-forming galaxies (SFGs) at z similar to 2, indicating a compact dusty core in A2744-DSG-z3. Moreover, this galaxy appears to be living in a group environment: including A2744-DSG-z3, at least three galaxies at z = 3.05-3.06 are spectroscopically confirmed by JWST/NIRISS and ALMA, residing within a lensing-corrected projected scale of approximate to 70 kpc. This, along with the asymmetric brightness profile, further suggests that the spiral arms may be triggered by minor-merger events at z greater than or similar to 3.
dc.fuente.origenWOS
dc.identifier.doi10.3847/2041-8213/aca652
dc.identifier.eissn2041-8213
dc.identifier.issn2041-8205
dc.identifier.urihttps://doi.org/10.3847/2041-8213/aca652
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92528
dc.identifier.wosidWOS:000905275200001
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal letters
dc.rightsacceso restringido
dc.titleThe Identification of a Dusty Multiarm Spiral Galaxy at <i>z </i>=3.06 with JWST and ALMA
dc.typeartículo
dc.volumen942
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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