A NEW APPROACH TO STELLAR INTERFEROMETRY BASED ON SPATIAL-COHERENCE SPECTROSCOPY

Citation
Hc. Kandpal et al., A NEW APPROACH TO STELLAR INTERFEROMETRY BASED ON SPATIAL-COHERENCE SPECTROSCOPY, Indian Journal of Pure & Applied Physics, 35(12), 1997, pp. 756-766
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
ISSN journal
0019-5596
Volume
35
Issue
12
Year of publication
1997
Pages
756 - 766
Database
ISI
SICI code
0019-5596(1997)35:12<756:ANATSI>2.0.ZU;2-L
Abstract
A new method is proposed for determining the coherence properties of t he wave fields, produced by a broadband source, from the spectral chan ges produced on interference. The knowledge of the spectral degree of coherence combined with the space-frequency equivalence principle can be used to determine the intensity distribution across the source of t he field, This method might be useful for enhancing the efficiency of the existing imaging instruments over a broad range of frequencies, i. e. radio, optical and X-rays. The application to the measurement of th e angular diameters of stars is also considered.