Physics – Optics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...20115105l&link_type=abstract
American Astronomical Society Meeting 201, #151.05; Bulletin of the American Astronomical Society, Vol. 35, p.576
Physics
Optics
Scientific paper
This talk describes a new concept for visible direct detection of extrasolar planets using a nulling coronagraph instrument behind a single telescope in space. In the baseline design, a 4 beam nulling interferometer is synthesized from the telescope pupil, producing a very deep theta4 null which is then filtered by a coherent array of single mode fibers to suppress the residual scattered light. A 1.2m diameter telescope is sufficient for detecting Jupiter-like planets, and a 4m telescope is capable of detecting Earth-like planets. With perfect optics, the stellar leakage of our device is less than 1e-11 of the starlight at the location of the planet. With diffraction limited telescope optics (lambda/20), suppression of the starlight to ˜1e-10 is possible. The instrumental concepts are described along with the key advantages over more traditional approaches such as apodized aperture telescopes and Lyot type coronagraphs. Imaging examples are given as well as results of preliminary laboratory demonstrations.
Beichman Charles Arnold
Levine Martin B.
Liu David T.
Martín Samuel
Mennesson Bertrand
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