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Scattering And Absorption of Light in Planetary Regoliths

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A circumstellar disk around Beta pictoris.

B A Smith, R J Terrile

Science (New York, N.Y.)

|December 21, 1984

Summary

This summary is machine-generated.

Astronomers observed a large circumstellar disk around the star beta Pictoris, extending over 400 AU. This disk

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Area of Science:

Astronomy and Astrophysics
Planetary Science

Background:

A circumstellar disk was detected around the star beta Pictoris using optical observations.
Initial detection of the disk was made using the Infrared Astronomy Satellite (IRAS).
The disk extends significantly further than previously measured, reaching over 400 astronomical units (AU).

Purpose of the Study:

To optically characterize the circumstellar disk around beta Pictoris.
To understand the physical properties and extent of the beta Pictoris disk.
To investigate the implications of the disk's structure for planet formation.

Main Methods:

Optical observation of the circumstellar disk around beta Pictoris.
Analysis of surface brightness changes with radial distance to infer mass density.
Comparison of optical observations with previous infrared data from IRAS.

Main Results:

The beta Pictoris disk is observed nearly edge-on, composed of solid particles in coplanar orbits.
Mass density of the disk decreases with approximately the third power of the radius.
The disk's flattened structure suggests an association with planet formation processes.

Conclusions:

The circumstellar disk around beta Pictoris is likely associated with ongoing or recent planet formation.
The system is presumed to be relatively young, supporting the planet formation hypothesis.
The observed disk structure provides insights into the early stages of planetary system development.