Protoplanetary disk
A protoplanetary disk is a rotating circumstellar disc of dense gas and dust surrounding a young star that has just formed. Protoplanetary disks have radii up to 1000 AU. Protoplanetary disks have been seen around several young stars in our galaxy.[1]
Protoplanetary disks are thought to be thin structures. They have mass that is much smaller than the young star in the center.[2]
Protoplanetary Disk Media
Atacama Large Millimeter Array image of HL Tauri
The evolutionary sequence of protoplanetary disks with substructures
A 2009 image showing fractions of stars that suggest some evidence of having a protoplanetary disk as a function of their stellar age in millions of years; The samples are nearby young clusters and associations.
Protoplanetary disk. Simulated spiral arm vs observational data.
An artist's illustration giving a simple overview of the main regions of a protoplanetary disk, delineated by the soot and frost line, which for example has been observed around the star V883 Orionis.
A model of a protoplanetary disk
Illustration of the dynamics of a proplyd
20 protoplanetary discs captured by the High Angular Resolution Project (DSHARP).
A shadow is created by the protoplanetary disc surrounding the star HBC 672 within the nebula.
Video shows the evolution of the disc around a young star like HL Tauri (artist concept).
References
- ↑ Ricci, L.. Thehubble Space Telescope/Advanced Camera for Surveys Atlas of Protoplanetary Disks in the Great Orion Nebula. The Astronomical Journal 136 (5) (2008-11-01). p. 2136–2151. doi:10.1088/0004-6256/136/5/2136.
- ↑ Armitage, Philip J.. Dynamics of Protoplanetary Disks (in en). Annual Review of Astronomy and Astrophysics 49 (1) (2011-09-22). p. 195–236. doi:10.1146/annurev-astro-081710-102521. Retrieved 2020-10-22.
