We analyze the far-ultraviolet (1130-1770 angstrom rest frame) spectroscopy of 20 young (<50 Myr) and massive (>10(4) M-circle dot) star clusters (YSCs) in 11 nearby star-forming galaxies. We probe the interstellar gas intervening along the line of sight, detecting several metal absorption lines of a wide range of ionization potentials, from 6.0 to 77.5 eV. Multiple-component Voigt fits to the absorption lines are used to study the kinematics of the gas. We find that nearly all targets in the sample feature gas outflowing from 30 up to 190 km s(-1), often in both the neutral and ionized phases. The outflow velocities correlate with the underlying stellar population properties directly linked to the feedback: the mass of the YSCs, the photon production rate, and the instantaneous mechanical luminosity produced by stellar winds and supernovae. We detect a neutral inflow in four targets, which we interpret as likely not associated with the star cluster but tracing larger-scale gas kinematics. A comparison between the outflows' energy and that produced by the associated young stellar populations suggests an average coupling efficiency of 10% with a broad scatter. Our results extend the relation found in previous works between galactic outflows and the host galaxy star formation rate to smaller scales, pointing toward the key role that clustered star formation and feedback play in regulating galaxy growth.

Sirressi, M., Adamo, A., Hayes, M., Rivera-Thorsen, T., Aloisi, A., Bik, A., et al. (2024). CLusters in the Uv as EngineS (CLUES). II. Subkiloparsec-scale Outflows Driven by Stellar Feedback. THE ASTRONOMICAL JOURNAL, 167(4) [10.3847/1538-3881/ad29f9].

CLusters in the Uv as EngineS (CLUES). II. Subkiloparsec-scale Outflows Driven by Stellar Feedback

Fumagalli, Michele;
2024

Abstract

We analyze the far-ultraviolet (1130-1770 angstrom rest frame) spectroscopy of 20 young (<50 Myr) and massive (>10(4) M-circle dot) star clusters (YSCs) in 11 nearby star-forming galaxies. We probe the interstellar gas intervening along the line of sight, detecting several metal absorption lines of a wide range of ionization potentials, from 6.0 to 77.5 eV. Multiple-component Voigt fits to the absorption lines are used to study the kinematics of the gas. We find that nearly all targets in the sample feature gas outflowing from 30 up to 190 km s(-1), often in both the neutral and ionized phases. The outflow velocities correlate with the underlying stellar population properties directly linked to the feedback: the mass of the YSCs, the photon production rate, and the instantaneous mechanical luminosity produced by stellar winds and supernovae. We detect a neutral inflow in four targets, which we interpret as likely not associated with the star cluster but tracing larger-scale gas kinematics. A comparison between the outflows' energy and that produced by the associated young stellar populations suggests an average coupling efficiency of 10% with a broad scatter. Our results extend the relation found in previous works between galactic outflows and the host galaxy star formation rate to smaller scales, pointing toward the key role that clustered star formation and feedback play in regulating galaxy growth.
Articolo in rivista - Articolo scientifico
Observational astronomy; Ultraviolet surveys; Young star clusters; Stellar feedback; Interstellar clouds; 1145; 1742; 1833; 1602; 834; Astrophysics - Astrophysics of Galaxies
English
2024
167
4
166
none
Sirressi, M., Adamo, A., Hayes, M., Rivera-Thorsen, T., Aloisi, A., Bik, A., et al. (2024). CLusters in the Uv as EngineS (CLUES). II. Subkiloparsec-scale Outflows Driven by Stellar Feedback. THE ASTRONOMICAL JOURNAL, 167(4) [10.3847/1538-3881/ad29f9].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/473802
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