Beta Pictoris debris disk
The Beta Pictoris debris disk is a vast, nearly edge-on ring of dust and rocky-icy debris around the young star Beta Pictoris, and the FIRST debris disk ever imaged around another star (1984). It is COLLISIONAL debris — comets and asteroids left from planet formation grinding one another to dust — warped and shepherded by the system's giant planets. Because we see it almost exactly edge-on, it appears as a thin bright line through the star; it is the archetype of a young planetary system caught in the act of forming.
Key facts
Science
Classification
- Type
- Collisional debris disk (seen nearly edge-on)
- What it is
- Dust and debris left from planet formation, replenished by colliding comets and asteroids — the first such disk ever imaged (1984)
- Significance
- The archetypal young planetary system — proof that other stars form planets, with giant planets found embedded in the disk itself
Structure
- Extent
- A vast disk detected out to hundreds of AU (traced to ~1,800 AU) · many times the size of the Solar System's planetary region
- Orientation
- Seen almost exactly edge-on from Earth (~89°) — a thin bright line · which is why it was the first disk to be imaged
- Warps & belts
- A warped inner disk and secondary belts — signatures of the system's giant planets gravitationally sculpting the debris
How we know
- Note
- The disk is real and directly imaged — the first debris disk ever pictured around another star. It is shown edge-on, its true orientation, as a soft dust band; the fine warps and belts are modelled/illustrative, not a photograph, and the giant planets embedded in it are shown at their real measured orbits.
Discovery & history
- Method
- Infrared excess (space telescope)
- Name
- Named for its host star, Beta Pictoris; the disk has no separate proper name.
First photographed in 1984 by Bradford Smith and Richard Terrile after IRAS detected the star's infrared excess — the disk that proved other stars really do form planetary systems, and where Beta Pic b was later found embedded.
Images
Images from open archives · credit shown per image