Dirk Puetzfeld

Equations of Motion in Relativistic Gravity
Dirk Puetzfeld, Claus Lammerzahl, Bernard Schutz
 Springer
 1 Juin 2015
 9783319183350
The present volume aims to be a comprehensive survey on the derivation of the equations of motion, both in General Relativity as well as in alternative gravity theories. The topics covered range from the description of test bodies, to selfgravitating (heavy) bodies, to current and future observations.
Emphasis is put on the coverage of various approximation methods (e.g., multipolar, postNewtonian, selfforce methods) which are extensively used in the context of the relativistic problem of motion. Applications discussed in this volume range from the motion of binary systems  and the gravitational waves emitted by such systems  to observations of the galactic center. In particular the impact of choices at a fundamental theoretical level on the interpretation of experiments is highlighted.
This book provides a broad and updodate status report, which will not only be of value for the experts working in this field, but also may serve as a guideline for students with background in General Relativity who like to enter this field. 
Due to steadily improving experimental accuracy, relativistic concepts  based on Einstein's theory of Special and General Relativity  are playing an increasingly important role in modern geodesy. This book offers an introduction to the emerging field of relativistic geodesy, and covers topics ranging from the description of clocks and test bodies, to time and frequency measurements, to current and future observations.
Emphasis is placed on geodetically relevant definitions and fundamental methods in the context of Einstein's theory (e.g. the role of observers, use of clocks, definition of reference systems and the geoid, use of relativistic approximation schemes). Further, the applications discussed range from chronometric and gradiometric determinations of the gravitational field, to the latest (satellite) experiments. The impact of choices made at a fundamental theoretical level on the interpretation of measurements and the planning of future experiments is also highlighted. Providing an uptotheminute status report on the respective topics discussed, the book will not only benefit experts, but will also serve as a guide for students with a background in either geodesy or gravitational physics who are interested in entering and exploring this emerging field.

Exact SpaceTime Models of Gravitational Waves
Dirk Puetzfeld, Peter A. Hogan
 Springer
 27 Octobre 2022
 9783031168260
The book is about exact spacetime models of the gravitational fields produced by gravitational radiation. The authors' extensive work in the field is reviewed in order to stimulate the study of such models, that have been known for a long time, and to highlight interesting physical aspects of the existing models in some novel detail. There is an underlying simplicity to the gravitational radiation studied in this book. Apart from the basic assumption that the radiation has clearly identifiable wave fronts, the gravitational waves studied are directly analogous to electromagnetic waves. The book is meant for advanced students and researchers who have a knowledge of general relativity sufficient to carry out research in the field.