Laboratory detection of X-ray fringes with a grazing-incidence interferometer

Details Laboratory detection of X-ray fringes with a grazing-incidence interferometer Laboratory detection of X-ray fringes with a grazing-incidence interferometer

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000natur.407..160c&link_type=abstract

Nature, Volume 407, Issue 6801, pp. 160-162 (2000).

Physics

Optics

47

Scientific paper

Starting with Galileo's observations of the Solar System, improvements of an order of magnitude in either the sensitivity or resolution of astronomical instruments have always brought revolutionary discoveries. The X-ray band of the spectrum, where exotic objects can have extremely high surface brightness, is ideally suited for significant improvements in imaging, but progress has been impeded by a lack of optics of sufficiently high sensitivity and quality. Here we present an X-ray interferometer design that is practical for adaptation to astronomical observatories. Our prototype interferometer, having just under one millimetre of baseline, creates fringes at 1.25keV with an angular resolution of 100 milliarcseconds. With a larger version in orbit it will be possible to resolve X-ray sources at 10-7arcseconds, three orders of magnitude better than the finest-resolution images ever achieved on the sky (in the radio part of the spectrum) and over one million times better than the current best X-ray images. With such resolutions, we can study the environments of pulsars, resolve and then model relativistic blast waves, image material falling into a black hole, watch the physical formation of astrophysical jets, and study the dynamos of stellar coronae.

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