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