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The Impact of Realistic Red Supergiant Mass Loss on Stellar Evolution

Beasor, ER, Davies, B and Smith, N (2021) The Impact of Realistic Red Supergiant Mass Loss on Stellar Evolution. Astrophysical Journal, 922 (1). ISSN 0004-637X

The impact of realistic red supergiant mass-loss on stellar evolution.pdf - Accepted Version

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Accurate mass-loss rates are essential for meaningful stellar evolutionary models. For massive single stars with initial masses between 8 and 30M⊙the implementation of cool supergiant mass loss in stellar models strongly affects the resulting evolution, and the most commonly used prescription for these cool-star phases is that of de Jager. Recently, we published a new Ṁ prescription calibrated to RSGs with initial masses between 10 and 25 M⊙, which unlike previous prescriptions does not overestimate Ṁ for the most massive stars. Here, we carry out a comparative study to the MESA-MIST models, in which we test the effect of altering mass loss by recomputing the evolution of stars with masses 12-27 M⊙ with the new Ṁ-prescription implemented. We show that while the evolutionary tracks in the HR diagram of the stars do not change appreciably, the mass of the H-rich envelope at core collapse is drastically increased compared to models using the de Jager prescription. This increased envelope mass would have a strong impact on the Type II-P SN lightcurve, and would not allow stars under 30 M⊙ to evolve back to the blue and explode as H-poor SN. We also predict that the amount of H-envelope around single stars at explosion should be correlated with initial mass, and we discuss the prospects of using this as a method of determining progenitor masses from supernova light curves.

Item Type: Article
Uncontrolled Keywords: Science & Technology; Physical Sciences; Astronomy & Astrophysics; LOSS RATES; INITIAL MASSES; O-STARS; SUPERNOVA; PROGENITORS; SINGLE; ROTATION; 0201 Astronomical and Space Sciences; 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0306 Physical Chemistry (incl. Structural); Astronomy & Astrophysics
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society; IOP Publishing
SWORD Depositor: A Symplectic
Date Deposited: 09 May 2022 10:03
Last Modified: 19 Nov 2022 00:50
DOI or ID number: 10.3847/1538-4357/ac2574
URI: https://researchonline.ljmu.ac.uk/id/eprint/16774
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