book chapter published yes Dominic M. Bowman author Lisa Annabelle Bugnet author d9edb345-f866-11ec-9b37-d119b52345010000-0003-0142-4000 IlyaMandel editor LiBu department Asteroseismology is the study of the interior physics and structure of stars using their pulsations. It is applicable to stars across the Hertzsprung–Russell (HR) diagram and a powerful technique not only to measure masses, radii, and ages but also directly constrain interior rotation, chemical mixing, and magnetism. This is because a star's self-excited pulsation modes are sensitive to its structure. Asteroseismology generally requires long-duration and high-precision time-series data. The method of forward asteroseismic modeling, which is the statistical comparison of observed pulsation mode frequencies to theoretically predicted pulsation frequencies calculated from a grid of models, provides precise constraints for calibrating various transport phenomena. In this introduction to asteroseismology, we provide an overview of its principles, and the typical data sets and methodologies used to constrain stellar interiors. Finally, we present key highlights of asteroseismic results from across the HR diagram, and conclude with ongoing challenges and future prospects for this ever-expanding field within stellar astrophysics. Elsevier2026 eng 9780443214400 2410.0171510.1016/b978-0-443-21439-4.00036-5 2133-153 Bowman DM, Bugnet LA. Asteroseismology. In: Mandel I, ed. <i>Encyclopedia of Astrophysics</i>. Vol 2. Elsevier; 2026:133-153. doi:<a href="https://doi.org/10.1016/b978-0-443-21439-4.00036-5">10.1016/b978-0-443-21439-4.00036-5</a> D.M. Bowman, L.A. Bugnet, in:, I. Mandel (Ed.), Encyclopedia of Astrophysics, Elsevier, 2026, pp. 133–153. D. M. Bowman and L. A. Bugnet, “Asteroseismology,” in <i>Encyclopedia of Astrophysics</i>, vol. 2, I. Mandel, Ed. Elsevier, 2026, pp. 133–153. Bowman, Dominic M., and Lisa Annabelle Bugnet. “Asteroseismology.” <i>Encyclopedia of Astrophysics</i>, edited by Ilya Mandel, vol. 2, Elsevier, 2026, pp. 133–53, doi:<a href="https://doi.org/10.1016/b978-0-443-21439-4.00036-5">10.1016/b978-0-443-21439-4.00036-5</a>. Bowman, D. M., &#38; Bugnet, L. A. (2026). Asteroseismology. In I. Mandel (Ed.), <i>Encyclopedia of Astrophysics</i> (Vol. 2, pp. 133–153). Elsevier. <a href="https://doi.org/10.1016/b978-0-443-21439-4.00036-5">https://doi.org/10.1016/b978-0-443-21439-4.00036-5</a> Bowman DM, Bugnet LA. 2026.Asteroseismology. In: Encyclopedia of Astrophysics. vol. 2, 133–153. Bowman, Dominic M., and Lisa Annabelle Bugnet. “Asteroseismology.” In <i>Encyclopedia of Astrophysics</i>, edited by Ilya Mandel, 2:133–53. Elsevier, 2026. <a href="https://doi.org/10.1016/b978-0-443-21439-4.00036-5">https://doi.org/10.1016/b978-0-443-21439-4.00036-5</a>. 212302026-02-16T10:43:01Z2026-02-17T11:05:20Z