Welcome to METISSE's documentation!

METISSE stands for METhod of Interpolation for Single Star Evolution. It is an open-source stellar evolution tool designed to provide a fast and flexible alternative to traditional rapid stellar evolution prescriptions.

At its core, METISSE interpolates between pre-computed stellar evolution tracks to determine stellar parameters such as luminosity, radius, and core mass at any evolutionary stage. This approach allows users to incorporate stellar models directly into large-scale stellar and binary population synthesis simulations.

What you can do with METISSE?

METISSE has been specifically designed to be integrated with binary evolution and population synthesis frameworks that currently rely on the Fortran 77-based SSE (Hurley et al. 2000) code.

Although METISSE can be run as a standalone program to evolve individual stars or simple stellar populations, its main strength lies in serving as an stellar engine within population synthesis environments. You can:

• Run METISSE independently to evolve single stellar systems from pre-computed tracks

• Use METISSE with supported binary evolution codes to evolve stars in binaries

• Use your own custom stellar tracks to test different physical assumptions

• Combine METISSE with your code to perform population studies using modern stellar data

Learn more

• Installation — how to download METISSE
• Use METISSE to evolve single stars
• Use METISSE as the stellar engine to evolve binaries
• Use custom tracks — how to use your own tracks with METISSE
• Structure and integration — how METISSE works under the hood