Bøger i Astrophysics and Space Science Library serien

Characterizing Stellar and Exoplanetary Environments

The existence of blue straggler stars, which appear younger, hotter, and more massive than their siblings, is at odds with a simple picture of stellar evolution.

Proceedings of the Summer School, held August 14-26, 1972, at the Banff Centre, Banff, Alberta, Canada

Proceedings of a Symposium held in Dwingeloo, The Netherlands, September 24-26, 1984 in honour of Adriaan Blaauw on the occasion of his 70th birthday

This book is dedicated to the memory of Gisèle Mersch whose life ended prematurely in June 2002. Back in the 1970s, when few people were using them, Gisèle introduced me to the arcane secrets of then advanced m- tivariate statistical methodologies. I was already involved in more classical statistical studies undertaken at Paris Observatory with Jean Jung: developing and applying maxim- likelihood algorithms to stellar photometric and kinematic data in order to derive absolute luminosities, distances and velocities in the solar neighb- hood. But what could be envisaged with those methodologies was something of another dimension: for the first time, I could really see how to extract information from massive amounts of data without calling for elaborated physical or mechanical theories. Several pioneering applications were developed under Gisèle¿s guidance and with her collaboration to study the delicate interface between spect- scopic and photometric data. Thus errors in spectral classifications were investigated as well as predictions of spectral classifications from pho- metric indices (see Heck 1976, Heck et al. 1977, Heck & Mersch 1980 and Mersch & Heck 1980), with very interesting results for the time. Gisèle also took part in studies of period determination algorithms (see Mersch & Heck 1981, Manfroid et al. 1983 and Heck et al. 1985).

For many years I was organizing a weekly seminar on dynamical astronomy, and I used to make some historical remarks on every subject, including some anecdotes from my contacts with many leading scientists over the years.

In 1988, in an article on the analysis of the measurements of the variations in the radial velocities of a number of stars, Campbell, Walker, and Yang reported an - teresting phenomenon;the radial velocity variations of Cephei seemed to suggest the existence of a Jupiter-like planet around this star.

Proceedings of a Workshop held at the Leiden Observatory, The Netherlands, August 4-6, 1982

No theo ries of such an evolution are as yet sufficently specific - let alone infallible - not to require continual tests by a confrontation of their consequences with the observed prop erties of actual stars at different stages of their evolution.

Proceedings of IAU Colloquium No. 10, held at the Institute of Theoretical Astronomy, Cambridge University, Cambridge, August 12-15, 1970

Among the many works devoted to our space environment, this serious and objective book by Mr. Delobeau should occupy a special place. It is a sign of the times that the results of space research should no longer be confined to the circle of space technicians. There is scarcely any branch of science that evolves more rapidly than space research.

Proceedings of a Symposium organized by the Summer Advanced Study Institute, held at the University of California, Santa Barbara, Calif., August 4-15, 1969

Socrates knew all that was known by his contemporaries. It is true that Pico della Mirandola, Pius II, Leonardo da Vinci, and several other great minds were thoroughly in possession of considerable know ledge, and knew all that one could know, except no doubt for some techniques.

Proceedings from the Second Trieste Colloquium on Astrophysics, September 12-17, 1968

Proceedings of a Symposium on Meteorite Research held in Vienna, Austria, August 7-13, 1968

Second International Orbital Laboratory Symposium, organized by the International Academy of Astronautics at the XIXth International Astronautical Congress, New York, October 18, 1968

Proceedings of the Third ESRO Summer School in Space Physics, held in Alpbach, Austria, July 19-August 13, 1965

Proceedings of the 1999 Pacific Rim Conference

Our Sun is the nearest star and thus an ideal laboratory to study dynamic processes which are related to solar terrestrial physics.

Proceedings of the International Symposium on Supercomputing held in Tokyo, Japan, September 1-3, 1997

Proceedings of the Workshop held at Tonantzintla, Puebla, Mexico, 9-11 October 2000

This material also includes tables of line frequencies from 12 MHz to 30THz (AlOJLm) as well as FORTRAN computer code to calculate the fine structure components of the lines, to evaluate radial matrix integrals, and to calculate the departure coefficients of hydrogen in a cosmic environment.

Introduction The extragalactic X-ray background (XRB), discovered about 30 years ago, has been studied extensively with many X-ray experiments, in particular with the satel lites HEAO I and II (see ego Boldt 1987) and with ROSAT (e.

Proceedings of the Conference on `Digitised Optical Sky Surveys', held in Edinburgh, Scotland, 18-21 June 1991

Proceedings of an International Conference held in Tokyo, Japan, September 4-8, 1990

Proceedings of the 1996 INAOE Summer School of Millimeter-Wave Astronomy held at INAOE, Tonantzintla, Puebla, Mexico, 15-31 July 1996

Although the field is rapidly changing, with so-called facts in a state ofconstant volubility, now is a good time for reflection prior to the commencement ofthe Sloan Survey, presumably the definitive large-scale program of low- to moderate-redshift galaxies in our lifetime.

Proceedings of the 3rd EUROCONFERENCE on Near-Infrared Surveys held at Meudon Observatory, France on June 19-20, 1997

Proceedings of a Workshop held at Puerto de la Cruz, Tenerife (Spain) on 22-26 April 1996