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What the JWST can tell us about the Origin of Multiple Stellar Populations in Globular Clusters

Published online by Cambridge University Press:  13 February 2024

Anna F. Marino Open the ORCID record for Anna F. Marino [Opens in a new window]
Anna F. Marino*
Affiliation:
Istituto Nazionale di Astrofisica - Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, Padova, IT-35122 Istituto Nazionale di Astrofisica - Osservatorio Astrofisico di Arcetri, Largo Enrico Fermi, 5, Firenze, IT-50125.
*
email: [email protected]
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Abstract

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I present the first results of multiple stellar populations in globular clusters from James Webb Space Telescope (JWST) data. We obtained combined NIRSpec and NIRCam data of the GC 47 Tucanae to investigate the properties of the different stellar populations in the low-mass regime, down to ∼0.5 M⊙. Our analysis of both the photometric data and the spectra suggests that the multiple stellar populations among M dwarfs share similar properties of those extensively studied on bright red giant branch stars. The comparison between stellar populations’ properties at different stellar mass, e.g. at the red giants and M dwarfs’ phases, can potentially provide strong constraints to the formation scenarios of the still eluding phenomenon of the multiple populations in star clusters.

Keywords

globular clusters: generalstars: population IIstars: abundancestechniques: photometrytechniques: spectroscopy
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S377: Early Disk-Galaxy Formation from JWST to the Milky Way , December 2022 , pp. 65 - 74
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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