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Pushing the boundaries of asteroseismic individual frequency modelling: unveiling two evolved very low-metallicity red giants

Context. Metal-poor stars play a crucial role in understanding the nature and evolution of the first stellar generation in the Galaxy. Previously, asteroseismic characterisation of red-giant stars has relied on constraints from the global asteroseismic parameters and not the full spectrum of individu...

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Main Authors: Larsen, Jens R. (Author) , Rørsted, J. L. (Author) , Aguirre Børsen-Koch, V. (Author) , Lundkvist, M. S. (Author) , Christensen-Dalsgaard, J. (Author) , Winther, M. L. (Author) , Stokholm, A. (Author) , Li, Y. (Author) , Slumstrup, D. (Author) , Kjeldsen, H. (Author) , Corsaro, E. (Author) , Benomar, O. (Author) , Dhanpal, S. (Author) , Weiss, A. (Author) , Mosser, B. (Author) , Hekker, Saskia (Author) , Stello, D. (Author) , Korn, A. J. (Author) , Jendreieck, A. (Author) , Elsworth, Y. (Author) , Handberg, R. (Author) , Kallinger, T. (Author) , Jiang, C. (Author) , Ruchti, G. (Author)
Format: Article (Journal)
Language:English
Published: 14 May 2025
In: Astronomy and astrophysics
Year: 2025, Volume: 697, Pages: 1-23
ISSN:1432-0746
DOI:10.1051/0004-6361/202453554
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1051/0004-6361/202453554
Verlag, kostenfrei, Volltext: https://www.aanda.org/10.1051/0004-6361/202453554
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Author Notes:J.R. Larsen, J.L. Rørsted, V. Aguirre Børsen-Koch, M.S. Lundkvist, J. Christensen-Dalsgaard, M.L. Winther, A. Stokholm, Y. Li, D. Slumstrup, H. Kjeldsen, E. Corsaro, O. Benomar, S. Dhanpal, A. Weiss, B. Mosser, S. Hekker, D. Stello, A.J. Korn, A. Jendreieck, Y. Elsworth, R. Handberg, T. Kallinger, C. Jiang, and G. Ruchti
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Summary:Context. Metal-poor stars play a crucial role in understanding the nature and evolution of the first stellar generation in the Galaxy. Previously, asteroseismic characterisation of red-giant stars has relied on constraints from the global asteroseismic parameters and not the full spectrum of individual oscillation modes. Using the latter, we present for the first time the characterisation of two evolved very metal-poor stars including the detail-rich mixed-mode patterns.
Item Description:Gesehen am 27.10.2025
Physical Description:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361/202453554

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