Abstract
Faint circumstellar features in the close vicinity of stars or qso’s are of considerable astrophysical interest since they can provide important informations on stellar parameters and evolutions: stellar companions give mass information; coronae many of which are likely to be much brighter than the sun’s (ref: Betelgeuse) give information on magnetic fields and fast varying phenomena at stellar surfaces; planetary nebulae may provide information on the birth of planets; disk structures similar to Saturn’s rings provide checks on theories which predict their frequent occurence; planets themselves of course are worth appreciable detection efforts since they may ultimatly provide hints on the existence of extra-terrestrial civilisations. In this article, we discuss on coronographic and lock-in detection techniques applicable in the near future to observations with the Large Space Telescope. Those techniques enhance the visibility of circumstellar features to such a degree that even planets should become marginally detectable in some favorable cases.
This is a more detailed version of material previously submitted by A. Labeyrie as a proposal to NASA (1973)
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References
Lyot: Comptes rendus, 191, 1930, p 834
A. Labeyrie: Astronomy and Astrophysics, 6, 85–87 (1970)
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© 1975 D. Reidel Publishing Company, Dordrecht-Holland
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Bonneau, D., Josse, M., Labeyrie, A. (1975). Lock-In Image Subtraction: Detectability of Circumstellar Planets with the Large Space Telescope. In: De Jager, C., Nieuwenhuijzen, H. (eds) Image Processing Techniques in Astronomy. Astrophysics and Space Science Library, vol 54. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1881-4_52
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DOI: https://doi.org/10.1007/978-94-010-1881-4_52
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