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Pulsating Stars

ISBN: 978-3-527-40715-6
472 pages
March 2015
Pulsating Stars (3527407154) cover image

Description

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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Table of Contents

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

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Author Information

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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