Peter C. Aichelburg [SEP] occupation
Peter C. Aichelburg
Peter C. Aichelburg (born 9 November 1941) is an Austrian physicist well known for his contributions to general relativity, particularly for his joint work with Roman Sexl on the Aichelburg–Sexl ultraboost of the Schwarzschild vacuum.
Life.
Peter Aichelburg is the second child of Ludwig Aichelburg (born 1917) and Martha Michalek (born 1920), a descendant of the Bohemian line of the House of Aichelburg from Carinthia.
Lectures by Walter Thirring influenced him to pursue theoretical problems. He was a postdoc
Aichelburg–Sexl ultraboost
In general relativity, the Aichelburg–Sexl ultraboost is an exact solution which models the spacetime of an observer moving towards or away from a spherically symmetric gravitating object at nearly the speed of light. It was introduced by Peter C. Aichelburg and Roman U. Sexl in 1971.
The metric tensor can be written, in terms of Brinkmann coordinates, as
The ultraboost can be obtained as the limit of a metric, which is also an exact solution, at least if one admits impulsive curvatures.