Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
Feedback in Extragalactic Star Clusters (FEAST): Spectral Energy Distributions and the Physical Properties of Star Clusters in NGC 628 with CIGALE |
| Συγγραφείς: |
Sean T. Linden, Angela Adamo, Alex Pedrini, Daniela Calzetti, Helena Faustino Vieira, Bruce G. Elmegreen, John S. Gallagher, Kelsey Johnson, Matteo Messa, Kathryn Grasha, Ana Duarte-Cabral, Arjan Bik, Giacomo Bortolini, Matteo Correnti, Drew Lapeer, Thomas S.-Y. Lai, Göran Östlin, Linda J. Smith, Monica Tosi |
| Πηγή: |
The Astrophysical Journal, Vol 1005, Iss 2, p 227 (2026) |
| Στοιχεία εκδότη: |
IOP Publishing, 2026. |
| Έτος έκδοσης: |
2026 |
| Συλλογή: |
LCC:Astrophysics |
| Θεματικοί όροι: |
Young star clusters, Star clusters, Astrophysics, QB460-466 |
| Περιγραφή: |
With Hubble Space Telescope and James Webb Space Telescope (JWST) observations of NGC 628 spanning 0.3–7.7 μ m, we fit the spectral energy distributions of over 12,000 optically selected star clusters, emerging young star clusters (eYSCs), and MIRI-selected sources with CIGALE to derive their ages, masses, extinctions, and dust properties. We find that near-IR selected eYSC-I (compact Pa α and 3.3 μ m polycyclic aromatic hydrocarbon (PAH) emission) and eYSC-II (compact Pa α and diffuse 3.3 μ m PAH emission) sources peak at ∼3–5 Myr, where ∼12% of the clusters have an E ( B − V ) > 2, demonstrating the presence of dust-embedded populations as clusters emerge. Further, the distributions of the fractional PAH abundance ( q _PAH ) and stellar-to-nebular attenuation ratio ( E ( B − V ) _⋆ / E ( B − V ) _neb ) suggest an evolutionary sequence in which sources evolve from eYSC-I to eYSC-II as clusters clear their surrounding dust and gas. The photodissociation region clearing timescale inferred from the ratio of eYSC-I to optically visible stellar clusters is ∼4 Myr. Additionally, we find that star clusters in the spiral arms of NGC 628 are preferentially more massive and more dust reddened than those in interarm regions. Finally, we find that ∼65% of eYSC-I, ∼27% of eYSC-II, and ∼40% of F335M-selected sources coincide with an F770W peak in our MIRI-selected catalog within 4 pixels, confirming that F770W-bright sources preferentially trace the youngest and dustiest regions. Overall, our results highlight the ability of JWST together with CIGALE model grids to identify and characterize eYSCs during their short-lived embedded phases, and provide constraints on the feedback mechanisms that govern the emergence of stellar clusters. |
| Τύπος εγγράφου: |
article |
| Περιγραφή αρχείου: |
electronic resource |
| Γλώσσα: |
English |
| ISSN: |
1538-4357 |
| Relation: |
https://doaj.org/toc/1538-4357 |
| DOI: |
10.3847/1538-4357/ae7b2d |
| Σύνδεσμος πρόσβασης: |
https://doaj.org/article/c3950f5a72774f2680571f588dd2b2b7 |
| Αριθμός Καταχώρησης: |
edsdoj.3950f5a72774f2680571f588dd2b2b7 |
| Βάση Δεδομένων: |
Directory of Open Access Journals |