We give a simple differential geometric proof of the conformal transformation of the night sky under change of observer. The proof does not use the four dimensionality of spacetime or spinor methods. Furthermore, it really shows that the result does not depend on Lorentz transformations. This approach, by giving a transparent covariant expression to the conformal factor, shows that in most situations it is possible to define athermal sky metric independent of the observer.
The conformal transformation of the night sky / Minguzzi, E. - In: CLASSICAL AND QUANTUM GRAVITY. - ISSN 0264-9381. - STAMPA. - 33:(2016), pp. 235009--. [10.1088/0264-9381/33/23/235009]
The conformal transformation of the night sky
MINGUZZI, ETTORE
2016
Abstract
We give a simple differential geometric proof of the conformal transformation of the night sky under change of observer. The proof does not use the four dimensionality of spacetime or spinor methods. Furthermore, it really shows that the result does not depend on Lorentz transformations. This approach, by giving a transparent covariant expression to the conformal factor, shows that in most situations it is possible to define athermal sky metric independent of the observer.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.