Variable Stars as Essential Astrophysical Tools: Proceeding of the NATO Advanced Study Institute on Variable Stars as Essential Astrophysical Tools Çe

ISBN-13: 9780792360841 / Angielski / Miękka / 1999 / 844 str.

Cafer Ibanogammalu

Opis

Pulsating and eccentric binary stars play a fundamentally important role in deciphering the mass distribution within stars. The present volume reviews the fundamental concepts of both radial and nonradial oscillations in the stars, including the Sun. Helio- and astroseismological results are reviewed, from the basics to the most recent developments. A new theory is presented, which seems to explain the mechanism of the light and radial velocity variations of recently discovered Ap stars. This textbook covers almost all kinds of variable stars of widely different characteristics. It will serve as a reference text for a very long time to come, not only for specialists but also for undergraduate students of physics and astronomy.

Spis treści

Preface; C. Ibanogammalu. Scientific Organizing Committee. Conference Photograph. List of Participants. I. Basic Aspects of Stellar Structure and Pulsation; J. Christensen-Dalsgaard, W.A. Dziembowski. II. An Introduction to Helioseismology; J. Christensen-Dalsgaard, et al. Solar Models and Helioseismology; M. Yildiz. III. Astrophysical Equation of State and Opacity; W. Däppen, J.A. Guzik. IV. Introduction to Asteroseismology of delta Scuti Stars; J.A. Guzik. The Pulsational Behaviour of Variable Stars in The Lower Part of the Instability Strip; E. Poretti. 57 Tau, a delta Scuti Star in Binary System in the Hyades; M. Paparó, E. Rodriguez, Z. Kollàth. V. Evolution and Hydrodynamics of Rotating Stars; R.G. Deupree, J.A. Guzik. VI. Techniques of Collection, Reduction and Analysis of Data of Pulsating Stars I: Multi-Band Multi-Longitude Campaigns; F.M. Zerbi. Techniques of Collection, Reduction and Analysis of Data of Pulsating Stars II: Cluster Surveys, Multi-Band Observations, New Approaches for gamma Doradus and delta Scuti Stars; F.M. Zerbi. Simultaneous Light Curve, Color Curve and Line Profile Fitting for Pulsating Stars. Objects in lower part of Cepheid Instability Strip: delta Scuti and gamma Doradus Stars; F.M. Zerbi. VII. An Introduction to Ap Stars, roAp Stars and the Asteroseismology of roAp Stars; D.W. Kurtz. Evidence for, and Development of, the Oblique Pulsator Model; D.W. Kurtz. Long-term Monitoring of Cyclic Frequency Variability in roAp Stars; D.W. Kurtz. Multi-color Observations and Atmospheric Level Effects in roAp Stars; D.W. Kurtz. Asteroseismology Versus Astrometry. Testing p-mode Predictions for roAp stars againstHipparcos; J. Matthews. Pulsational Radial Velocity Studies of roAp Stars &ggr; Equulei, 33 Librae, H.D. 134214, HR 1217, and HD 122970; A.P. Hatzes, et al. Asteroseismology with a Spatial Resolution: Prospects for Rapid RV-Spectroscopy of roAp Stars; D.E. Mkrtichian, et al. VIII. Asteroseismology of Cepheids; E. Poretti. On the Normalization of Cepheid Period-Luminosity Relationships; I. Iben, Jr. IX. Theoretical Models of &ggr; Doradus Variables; A.B. Kaye, et al. Gamma Doradus Stars: Observational Constraints to Theoretical Models; F.M. Zerbi, A.B. Kaye. X. Trend Analysis of Long Period Variables; J.A. Mattei, G. Foster. Absolute magnitudes of M Type Semi-regular Variables in Hipparcos Catalogue; Z. Aslan, C. Yeşilyaprak. XI. Pulsating White Dwarf Stars; S.D. Kawaler. XII. The O&endash;C Diagram; C. Sterken. Period Changes as a Tool to Study Stellar Evolution; G. Handler. XIII. Binary Stars. Apisidal Motion in Close Binaries; C. İbanoğlu. Apsidal Motion Studies for DI Her; M. Yldiz, et al. Irradiation Effects and Light Curve Solution of Close Hot Binaries; H. Drechsel. Orbital Period Variations of Some Algol-Type Binaries; S.O. Selam, O. Demircan. Period Changes as a Tool to Study Unseen Components Around Eclipsing Binaries; O. Demircan. Asymmetry in the Light Curves of Massive Binaries; O. Demircan. On the Gravity Darkening of Eclipsing Variables of W UMa Type; P.G. Niarchos. UBP Photometry of the Massive Eclipsing Binary TT Aurigae; S. Özdemir, et al. Orbital Period Changes and Global Evolution of Contact Binaries; H. Rovithis-Livaniou, A. Kalimeris. Det