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Dainis Dravins. Profile photo.

Dainis Dravins

Professor emeritus

Dainis Dravins. Profile photo.

Intensity interferometry : Optical imaging with kilometer baselines

Author

  • Dainis Dravins

Summary, in English

Optical imaging with microarcsecond resolution will reveal details across and outside stellar surfaces but requires kilometer-scale interferometers, challenging to realize either on the ground or in space. Intensity interferometry, electronically connecting independent telescopes, has a noise budget that relates to the electronic time resolution, circumventing issues of atmospheric turbulence. Extents up to a few km are becoming realistic with arrays of optical air Cherenkov telescopes (primarily erected for gamma-ray studies), enabling an optical equivalent of radio interferometer arrays. Pioneered by Hanbury Brown and Twiss, digital versions of the technique have now been demonstrated, reconstructing diffraction-limited images from laboratory measurements over hundreds of optical baselines. This review outlines the method from its beginnings, describes current experiments, and sketches prospects for future observations.

Department/s

  • Lund Observatory

Publishing year

2016

Language

English

Publication/Series

Optical and Infrared Interferometry and Imaging V

Volume

9907

Document type

Conference paper

Publisher

SPIE

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • Cherenkov telescopes
  • Intensity interferometry
  • Long baselines
  • Optical imaging
  • Stars
  • Stellar surfaces

Conference name

Optical and Infrared Interferometry and Imaging V

Conference date

2016-06-27 - 2016-07-01

Conference place

Edinburgh, United Kingdom

Status

Published

ISBN/ISSN/Other

  • ISBN: 9781510601932