GYRE: An open-source stellar oscillation code based on a new Magnus Multiple Shooting Scheme

By R. Townsend, S. Teitler. 2013

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We present a new oscillation code, GYRE, which solves the stellar pulsation equations (both adiabatic and non-adiabatic) using a novel Magnus Multiple Shooting numerical scheme devised to overcome certain weaknesses of the usual relaxation and shooting schemes appearing in the literature. The code is accurate (up to 6th order in the number of grid points), robust, efficiently makes use of multiple processor cores and/or nodes, and is freely available in source form for use and distribution. We verify the code against analytic solutions and results from other oscillation codes, in all cases finding good agreement. Then, we use the code to explore how the asteroseismic observables of a 1.5 M star change as it evolves through the red-giant bump.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/07361efd1933526dfb0685bec8c7def91748a238

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Citations in the corpus

Angular momentum transport by heat-driven g-modes in slowly pulsating B stars (2017, methodology): “Since the initial release described by Townsend & Teitler (2013), the gyre code has been significantly improved.”
MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): BINARIES, PULSATIONS, AND EXPLOSIONS (2015, methodology): “The corresponding red edge is not found because GYRE does not include a treatment of the pulsation-convection interaction — a necessary ingredient for modeling the classical red edge (see, e.g, section 3.7.3 of Aerts et al. 2010, and references therein).”
MESA ISOCHRONES AND STELLAR TRACKS (MIST). I. SOLAR-SCALED MODELS (2016, methodology): “We clarify that ∆ν and νmax in the MIST models are computed from simple scaling relations (e.g., Ulrich 1986; Brown et al. 1991; Kjeldsen & Bedding 1995) and not from full pulsation analysis, though the pulsation code GYRE (Townsend & Teitler 2013) is integrated into MESA.”
Modules for Experiments in Stellar Astrophysics (MESA): Time-dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure (2022, methodology): “Examples include Astropy (Astropy Collaboration et al. 2018, 2022), Athena++ (Stone et al. 2020; Jiang 2021), Castro (Almgren et al. 2020), Dedalus (Burns et al. 2020), emcee (Foreman-Mackey et al. 2013), Flash-X (Dubey et al. 2022), GYRE (Townsend 4 & Teitler 2013; Townsend et al. 2018), MAESTROeX ”
Modules for Experiments in Stellar Astrophysics ( ): Convective Boundaries, Element Diffusion, and Massive Star Explosions (2017, background): “Examples include ADIPLS (Christensen-Dalsgaard 2008; Christensen-Dalsgaard & Thompson 2011), GYRE (Townsend & Teitler 2013), and STELLA (Blinnikov et al. 1998; Blinnikov & Sorokina 2004; Baklanov et al. 2005; Blinnikov et al. 2006).”
Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation (2019, methodology): “We explore this by using release 5.2 of GYRE (Townsend & Teitler 2013; Townsend et al. 2018) to evaluate the star’s normal-mode frequencies at Xc = 0.15.”