The density distribution in the Beta Pictoris dust disk

Details The density distribution in the Beta Pictoris dust disk The density distribution in the Beta Pictoris dust disk

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...355l..43n&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 355, June 1, 1990, p. L43-L45.

Astronomy and Astrophysics

Astronomy

13

Density Distribution, Interplanetary Dust, Spatial Distribution, Stellar Envelopes, Brightness Distribution, Infrared Astronomy Satellite, Light Scattering, Scattering Cross Sections, Stellar Radiation

Scientific paper

There has been some controversy on the density distribution n(r) at distance r from the star in the Beta Pic dust disk: n proportional to 1/r cubed (derived on the assumption that particles are isotropically reflecting) versus n proportional to 1/r (inferred from the inversion equation for the scattering function), supposing in both cases that the dust size distribution is the same everywhere. Here, the inversion equation for the observed surface brightness distribution is studied. It is found that the distribution of the scattering cross section per unit volume must be proportional to r exp (1-mu) unless the dust is much more steeply forward-scattering than the interplanetary dust responsible for the zodiacal light.

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