The updated BaSTI stellar evolution models and isochrones - IV. α-Depleted calculations

Pietrinferni, A, Salaris, M ORCID: 0000-0002-2744-1928, Cassisi, S, Savino, A, Mucciarelli, A, Hyder, D and Hidalgo, S (2023) The updated BaSTI stellar evolution models and isochrones - IV. α-Depleted calculations. Monthly Notices of the Royal Astronomical Society, 527 (2). pp. 2065-2070. ISSN 0035-8711

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Abstract

This is the fourth paper of our new release of the BaSTI (a Bag of Stellar Tracks and Isochrones) stellar model and isochrone library. Following the updated solar-scaled, α-enhanced, and white dwarf model libraries, we present here α-depleted ([α/Fe] = -0.2) evolutionary tracks and isochrones, suitable to study the α-depleted stars discovered in Local Group dwarf galaxies and in the Milky Way. These calculations include all improvements and updates of the solar-scaled and α-enhanced models, and span a mass range between 0.1 and 15 MȮ, and 21 metallicities between [Fe/H] = -3.20 and +0.45 with a helium-to-metal enrichment ratio ΔY/ΔZ = 1.31, homogeneous with the solar-scaled and α-enhanced models. The isochrones - available in several photometric filters - cover an age range between ∼20 Myr and 14.5 Gyr, including the pre-main-sequence phase. We have compared our isochrones with independent calculations of α-depleted stellar models, available for the same α-element depletion adopted in the present investigation. We have also discussed the effect of an α-depleted heavy element distribution on the bolometric corrections in different wavelength regimes. Our α-depleted evolutionary tracks and isochrones are publicly available at our BaSTI website.

Item Type:	Article
Uncontrolled Keywords:	0201 Astronomical and Space Sciences; Astronomy & Astrophysics
Subjects:	Q Science > QB Astronomy
Divisions:	Astrophysics Research Institute
Publisher:	Oxford University Press (OUP)
Date of acceptance:	19 October 2023
Date of first compliant Open Access:	11 December 2023
Date Deposited:	11 Dec 2023 15:44
Last Modified:	25 Jul 2025 14:45
DOI or ID number:	10.1093/mnras/stad3267
URI:	https://researchonline.ljmu.ac.uk/id/eprint/22074

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