Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.322..436d&link_type=abstract
Nature (ISSN 0028-0836), vol. 322, July 31, 1986, p. 436-438. NASA-supported research.
Astronomy and Astrophysics
Astronomy
22
Extrasolar Planets, Infrared Astronomy, Stellar Envelopes, A Stars, Coronagraphs, Infrared Astronomy Satellite, Light Scattering, Scattering Coefficients
Scientific paper
IRAS and near-IR coronographic data for the A5V star Beta Pic are analyzed for evidence of planetary formation. The light scattered from the central star in the system is integrated along the distance to the star to determine the disk magnitude at various distances from the star. A modified gamma distribution is applied to evaluate the scattering coefficient to test a hypothesis that the inner 30 AU of the disk has been swept out by planets. The scattering from the region around Beta Pic is compared with scattering around other A5V stars. Finally, the IR data at 0.89 micron is compared with scattering at the coronograph wavelengths. No evidence is found to support the hypothesis of clearing in the inner disk, although large particle densities can be found very close to Beta Pic. The study illustrates the effectiveness of using scattered light and IR data to discover and characterize matter distributions circumstellar disks.
Appleby John F.
Diner David Joseph
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