Giant star-forming clumps?
| Autor: | Wiphu Rujopakarn, A. D. Biggs, E. Falgarone, P. van der Werf, V. Arumugam, Martin Zwaan, Rob Ivison, Johan Richard |
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| Přispěvatelé: | Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
Strong gravitational lensing
FOS: Physical sciences galaxies: starburst Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences infrared: galaxies galaxies: high-redshift 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics Galaxy cluster Physics Luminous infrared galaxy 010308 nuclear & particles physics Star formation Molecular cloud Astronomy and Astrophysics Giant star Astrophysics - Astrophysics of Galaxies Galaxy Interstellar medium Astrophysics - Solar and Stellar Astrophysics [SDU]Sciences of the Universe [physics] Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) galaxies: structure Astrophysics::Earth and Planetary Astrophysics Astrophysics - Instrumentation and Methods for Astrophysics submillimetre: galaxies |
| Zdroj: | Monthly Notices of the Royal Astronomical Society: Letters, 495(1), L1-L6 Monthly Notices of the Royal Astronomical Society: Letters Monthly Notices of the Royal Astronomical Society: Letters, 2020, 495, pp.L1-L6. ⟨10.1093/mnrasl/slaa046⟩ |
| ISSN: | 1745-3933 1745-3925 |
| DOI: | 10.1093/mnrasl/slaa046 |
| Popis: | With the spatial resolution of the Atacama Large Millimetre Array (ALMA), dusty galaxies in the distant Universe typically appear as single, compact blobs of dust emission, with a median half-light radius, $\approx$ 1 kpc. Occasionally, strong gravitational lensing by foreground galaxies or galaxy clusters has probed spatial scales 1-2 orders of magnitude smaller, often revealing late-stage mergers, sometimes with tantalising hints of sub-structure. One lensed galaxy in particular, the Cosmic Eyelash at $z=$ 2.3, has been cited extensively as an example of where the interstellar medium exhibits obvious, pronounced clumps, on a spatial scale of $\approx$ 100 pc. Seven orders of magnitude more luminous than giant molecular clouds in the local Universe, these features are presented as circumstantial evidence that the blue clumps observed in many $z\sim$ 2-3 galaxies are important sites of ongoing star formation, with significant masses of gas and stars. Here, we present data from ALMA which reveal that the dust continuum of the Cosmic Eyelash is in fact smooth and can be reproduced using two S\'ersic profiles with effective radii, 1.2 and 4.4 kpc, with no evidence of significant star-forming clumps down to a spatial scale of $\approx$ 80 pc and a star-formation rate of $ Comment: 5 pages; 3 figures; in press as a Letter to MNRAS |
| Databáze: | OpenAIRE |
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