Pulsating Stars de M Catelan

Pulsating Stars

M Catelan

This book surveys our understanding of stars which change in brightness because they pulsate. Pulsating variable stars are keys to distance scales inside and beyond the Milky Way galaxy. They test our understanding not only of stellar pulsation theory but also of stellar structure and evolution theory. Moreover, pulsating stars are important probes of the formation and evolution of our own and neighboring galaxies. Our understanding of pulsating stars has greatly increased in recent years as large-scale surveys of pulsating stars in the Milky Way and other Local Group galaxies have provided a wealth of new observations and as space-based instruments have studied particular pulsating stars in unprecedented detail.

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Notă biografică

Márcio Catelan holds a full professorship at the Catholic University of Chile. Previous assignments were with the University of Virginia and with NASA's Goddard Space Flight Center. He is the author of over 130 journal papers and numerous review articles, and presents an impressive record of institutional service and awards, including Hubble and Guggenheim fellowships. Horace Smith is Professor Emeritus in the Department of Physics and Astronomy at Michigan State University. He received his Master's degree and PhD from Yale and his research is focused on variable stars and what we can learn from them about the evolution of stars and galaxies. He has published extensively in astronomical journals and is the author of a book on RR Lyrae stars. He has served on numerous scientific committees and as a reviewer for several astronomical journals.

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Preface HISTORICAL OVERVIEW Discovery of the First Pulsating Variable Stars The Recognition of Pulsation as a Cause of Variability FUNDAMENTALS OF STELLAR VARIABILITY OBSERVATIONS Definitions Photometric Bandpasses Period Determination Common Observational Techniques Space-Based Versus Ground Observations CLASSIFICATION OF VARIABLE STARS Regular, Semi-Regular, and Irregular Variables Variability: Intrinsic and/or Extrinsic Extrinsic Variables Intrinsic Variables STELLAR STRUCTURE AND EVOLUTION THEORY The Basic Equations of Stellar Structure and Evolution The Evolution of Low-Mass Stars The Evolution of Intermediate-Mass Stars The Evolution of High-Mass Stars STELLAR PULSATION THEORY Timescales Ritter's (Period-Mean Density) Relation Basic Equations of (Radial) Stellar Pulsation Theory Linearization of the Stellar Pulsation Equations Linear Adiabatic Oscillations: The LAWE Eigenvalues and Eigenfunctions of the LAWE Non-Adiabatic Theory: Conditions for Stability The Linear Non-Adiabatic Wave Equation Driving Mechanism Stability Conditions and Instability Strip Edges Non-Radial Pulsations Nonlinear Effects RR LYRAE STARS RR Lyrae Stars as a Class of Pulsating Variable Star RR Lyrae Stars as Standard Candles Evolution of RR Lyrae Stars Pulsation The Blazhko Effect RR Lyrae Stars in Globular Clusters The Oosterhoff Groups Period Changes RR Lyrae Stars beyond the Milky Way CEPHEID AND RELATED VARIABLE STARS Classical Cepheids Type II Cepheids BL Boo Stars or Anormalous Cepheids RV Tauri Stars RED VARIABLE STARS Convection and Pulsation Mira and Related Long-Period Variables Semi-Regular Variables Irregular Variables PULSATING STARS CLOSE TO THE LOWER MAIN SEQUENCE IN THE H-R DIAGRAM Delta Scuti and SX Phoenicis Stars Gamma Doradus Stars roAp Stars PULSATING STARS CLOSE TO THE UPPER MAIN SEQUENCE IN THE H-R DIAGRAM Beta Cephei Stars SPB (53 Per) Stars PULSATING SUPERGIANT STARS SPBsg Variables PV Telescopii, V652 Herculis, and R CrB Stars Alpha Cygni, S Dor, and Wolf-Rayet Stars HOT SUBDWARF PULSATORS EC 14026 (V361 Hya, sdBV, sdBVp, sdBVr) Variables PG 1716+426 (V1093 Her, "Betsy", sdBVg, sdBVs) Variables sdOV (V499 Ser) Variables He-sdBV Stars PULSATING DEGENERATE STARS GW Vir Stars DBV (V777 Her) Stars DQV Stars DAV Stars ELM-HeV Stars GW Librae Stars: Accreting WD Pulsators Pulsations in Neutron Stars and Black Holes Glossary Index