At the Cross-Roads of Astrophysics and Cosmology (IAU S376): Period-Luminosity Relations in the 2020s

The period-luminosity relation (PLR) is a significant relationship between the physical properties of variable stars, allowing classical Cepheids to be used as primary distance indicators. IAU Symposium 376 discusses recent observational and theoretical results achieved by scrutinizing the PLR, including its shape, calibration, and dependence on stellar parameters and chemical abundances. Intrinsic PLR widths may offer unique insights into the physical processes shaping these relations and the underlying physical properties of the stars contributing to them.

Format: Hardback
Length: 300 pages
Publication date: 30 November 2023
Publisher: Cambridge University Press

The period-luminosity relation (PLR) holds significant importance in understanding the fundamental physical characteristics of a diverse range of variable stars. Among the most notable is the PLR of Cepheids, which enables classical Cepheids to serve as reliable primary distance indicators, establishing the traditional cosmic distance scale. Furthermore, well-defined connections exist between the periods and luminosities of numerous other pulsating star types. The International Astronomical Union (IAU) Symposium 376 delves into the latest observational and theoretical advancements achieved through the ongoing, meticulous examination of the PLR. This includes its shape, calibration, and dependence on stellar parameters and chemical abundances. Intrinsic PLR widths can provide valuable insights into the physical processes that shape these relations and the underlying physical properties of the stars involved. Given the recent abundance of data obtained through state-of-the-art ground- and space-based facilities, the impactful releases of Gaia data, and the initial operations of the James Webb Space Telescope, this topic remains highly relevant and timely.

ISBN-13: 9781009353045