Skip to main content Accessibility help
×
Home

Differential Speckle Interferometry Applied to Double Stars

  • Romain G. Petrov (a1) and Stephane Lagarde (a1)

Abstract

Differential Interferometry (DI) is the application of high angular resolution interferometric techniques to objects observed simultaneously at different wavelengths. When applied to unresolved double stars it makes it possible to measure the variation of the object photocenter with wavelength, which yields angular and spectral information well beyond the classical resolution limits. Signal–to–noise ratio analysis shows that, if DI experiments are limited by photon and speckle noise, the technique can be applied to a large number of double systems for the measurement of vectorial angular separations and of radial-velocity differences. With 4-m telescopes, there are a few tens of binary systems for which DI should permit the resolution and the measurement of the position angle of the rotation axis of at least one of the components. A preliminary experiment permitted a high SNR resolution of the double star Capella with a 1.52-m telescope and showed the current limitations of DI performances resulting from an imperfect correction of detector geometrical distortions.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Differential Speckle Interferometry Applied to Double Stars
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Differential Speckle Interferometry Applied to Double Stars
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Differential Speckle Interferometry Applied to Double Stars
      Available formats
      ×

Copyright

References

Hide All
Aime, C., Kadiri, S., Martin, F., Petrov, R., & Ricort, G. 1984, “Measurement of submilliarcsecond speckle displacements using a cross spectrum technique. Test on atmospheric dispersion”, A&A, 134, 354
Beckers, J.M. 1982, “Differential Speckle Interferometry”, Opt. Acta, 29, 361
Chelli, A. 1989, “The phase problem in optical interferometry: error analysis in the presence of photon noise”, A&A, 225, 277
Chelli, A. & Petrov, R.G. 1991, “Stellar diameter measurements using non-difraction limited differential speckle interferometry”, Proc. ESO Conf. High Resolution Imaging by Interferometry II, Garching, Germany.
Chelli, A. & Petrov, R.G. 1992 or 1993, “Model fitting and error analysis in sub diffraction limit differential interferometry”, to be submitted to A&A
Davis, J. 1979, “The application of high angular resolution stellar interferometry to the study of single objects in the visual region of the spectrum”, proc. IAU Colloquium No 50 on High Angular Resolution Stellar Interferometry, Davis, J. and Tango, W.J., eds. (U. Sydney Press)
Lagarde, S. 1991, “Que mesure l’interferometrie differentielle des tavelures ?”, Mémoire de stage de DEA, Université de Nice – Sophia Antipolis.
Lund, G. & Aime, C. 1988, “SNR analysis of super–resolving chromatic position difference techniques in astronomy”, Optics Comm., 67 (2), 79
Petrov, R.G., Roddier, F., & Aime, C. 1986, “Signal–to–noise ratio in differential speckle interferometry”, J. Opt. Soc. Am. A, 3 (5)
Petrov, R.G. 1989, “Differential Interferometryin Proc. NATO ASI Diffraction Limited Imaging with Very Large Telescopes, Cargse, France, Alloin, D.M., and Marietti, J.-M., eds., Kluwer Academic Pub
Petrov, R.G., Balega, Y.Y., Blazit, A., Borgnino, J., Foy, R., Lagarde, S., Martin, F., & Vassyuk, V. 1991, “First experimental results in sub-diffraction limit differential speckle interferometry”, Proc. ESO Conf. High Resolution Imaging by Interferometry II, Garching, Germany. (Note: the axes in Figure 8 are erroneously labelled: actually the x-axis is from East to West and the y-axis from North to South).
Petrov, R.G. & Cuevas, S. 1991, “Experimental concepts for sub-diffraction limit differential speckle interferometry”, Proc. ESO Conf. High Resolution Imaging by Interferometry II, Garching, Germany
Petrov, R.G., Lagarde, S., Martin, F., Blazit, A., & Foy, R. 1992 or 1993, “First experimental results in sub-diffraction limit differential speckle interferometry”, A&A, submitted
Tokovinin, A.A. 1991, “The potential of the differential speckle interferometry of binary stars”, Proc. ESO Conf. High Resolution Imaging by Interferometry II, Garching, Germany

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed