Dusty-wind-clear JWST Super-early Galaxies
The JWST discovery of a number of super-early (redshift z > 10) blue galaxies requires these systems to be essentially dust free in spite of their large stellar masses. A possible explanation is that dust is evacuated by radiatively driven outflows. We test this hypothesis by deriving the Eddingt...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/2041-8213/acb5f2 |
| _version_ | 1797697166489157632 |
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| author | Fabrizio Fiore Andrea Ferrara Manuela Bischetti Chiara Feruglio Andrea Travascio |
| author_facet | Fabrizio Fiore Andrea Ferrara Manuela Bischetti Chiara Feruglio Andrea Travascio |
| author_sort | Fabrizio Fiore |
| collection | DOAJ |
| description | The JWST discovery of a number of super-early (redshift z > 10) blue galaxies requires these systems to be essentially dust free in spite of their large stellar masses. A possible explanation is that dust is evacuated by radiatively driven outflows. We test this hypothesis by deriving the Eddington ratio λ _E = L _bol / L _E , where L _bol is the bolometric luminosity produced by star formation and possible black hole accretion, for 134 galaxies at 6.5 < z < 16. We find a strong anticorrelation between λ _E and dust UV optical depth, ${\tau }_{1500}\propto {\lambda }_{E}^{-0.63};$ also, λ _E increases with redshift. We confirm that galaxies exceeding a specific star formation rate sSFR > 13 Gyr ^−1 develop powerful outflows clearing the galaxy from its dust. This result is supported by ALMA dust continuum nondetections in three super-early systems. |
| first_indexed | 2024-03-12T03:36:23Z |
| format | Article |
| id | doaj.art-1721c1832b534b1c9fbbccd78e1000b0 |
| institution | Directory Open Access Journal |
| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-12T03:36:23Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj.art-1721c1832b534b1c9fbbccd78e1000b02023-09-03T13:08:50ZengIOP PublishingThe Astrophysical Journal Letters2041-82052023-01-019432L2710.3847/2041-8213/acb5f2Dusty-wind-clear JWST Super-early GalaxiesFabrizio Fiore0https://orcid.org/0000-0002-4031-4157Andrea Ferrara1https://orcid.org/0000-0002-9400-7312Manuela Bischetti2https://orcid.org/0000-0002-4314-021XChiara Feruglio3https://orcid.org/0000-0002-4227-6035Andrea Travascio4https://orcid.org/0000-0002-8863-888XINAF-Osservatorio Astronomico di Trieste, via Tiepolo 11, I-34143 Trieste, Italy ; fabrizio.fiore@inaf.it; IFPU—Institute for Fundamental Physics of the Universe, via Beirut 2, I-34151 Trieste, ItalyScuola Normale Superiore, Piazza dei Cavalieri 7, I-50126 Pisa, ItalyDipartimento di Fisica, Università di Trieste, Sezione di Astronomia, Via G.B. Tiepolo 11, I-34131 Trieste, ItalyINAF-Osservatorio Astronomico di Trieste, via Tiepolo 11, I-34143 Trieste, Italy ; fabrizio.fiore@inaf.itUniversitá degli Studi di Milano Bicocca , Piazza dell’Ateneo Nuovo 1, I-20126, Milan, ItalyThe JWST discovery of a number of super-early (redshift z > 10) blue galaxies requires these systems to be essentially dust free in spite of their large stellar masses. A possible explanation is that dust is evacuated by radiatively driven outflows. We test this hypothesis by deriving the Eddington ratio λ _E = L _bol / L _E , where L _bol is the bolometric luminosity produced by star formation and possible black hole accretion, for 134 galaxies at 6.5 < z < 16. We find a strong anticorrelation between λ _E and dust UV optical depth, ${\tau }_{1500}\propto {\lambda }_{E}^{-0.63};$ also, λ _E increases with redshift. We confirm that galaxies exceeding a specific star formation rate sSFR > 13 Gyr ^−1 develop powerful outflows clearing the galaxy from its dust. This result is supported by ALMA dust continuum nondetections in three super-early systems.https://doi.org/10.3847/2041-8213/acb5f2High-redshift galaxiesGalaxy evolutionGalaxy formation |
| spellingShingle | Fabrizio Fiore Andrea Ferrara Manuela Bischetti Chiara Feruglio Andrea Travascio Dusty-wind-clear JWST Super-early Galaxies The Astrophysical Journal Letters High-redshift galaxies Galaxy evolution Galaxy formation |
| title | Dusty-wind-clear JWST Super-early Galaxies |
| title_full | Dusty-wind-clear JWST Super-early Galaxies |
| title_fullStr | Dusty-wind-clear JWST Super-early Galaxies |
| title_full_unstemmed | Dusty-wind-clear JWST Super-early Galaxies |
| title_short | Dusty-wind-clear JWST Super-early Galaxies |
| title_sort | dusty wind clear jwst super early galaxies |
| topic | High-redshift galaxies Galaxy evolution Galaxy formation |
| url | https://doi.org/10.3847/2041-8213/acb5f2 |
| work_keys_str_mv | AT fabriziofiore dustywindclearjwstsuperearlygalaxies AT andreaferrara dustywindclearjwstsuperearlygalaxies AT manuelabischetti dustywindclearjwstsuperearlygalaxies AT chiaraferuglio dustywindclearjwstsuperearlygalaxies AT andreatravascio dustywindclearjwstsuperearlygalaxies |