protoplanetary disk

(redirected from Protoplanetary discs)
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Related to Protoplanetary discs: Proplyds

protoplanetary disk

[‚prōd·ō‚plan·ä‚ter·ē ′disk]
(astronomy)
References in periodicals archive ?
Abstract: We describe the evolution of a protoplanetary disc from the initial accretion infall to FU Orionis outbursts to the formation of planetesimals.
Today it is known that planets form from vast discs of gas and dust encircling newborn stars, known as protoplanetary discs. These can extend for thousands of millions of kilometres.
SPHERE is a recent addition to the VLTs array of instruments and with its combination of novel technologies, it provides a powerful method to directly image the fine details of protoplanetary discs .
The age of the newly detected protoplanetary disc makes RX J1615 an outstanding system, as most other examples of protoplanetary discs detected so far are relatively old or evolved.
By building an impressive body of knowledge about these protoplanetary discs, these teams are stepping closer to understanding how planets shape the discs that form them and therefore understanding planet formation itself.
Such an intricate sculpting of rings in a protoplanetary disc has only been imaged a handful of times before, and even more excitingly, the entire system seems to be only 1.8 million years old.
Young stars are often surrounded by dense, rotating discs of gas and dust, known as protoplanetary discs, from which planets are born.
The Atacama Large Millimeter/submillimeter Array (ALMA) has made the first ever resolved observation of a water snow line within a protoplanetary disc. This line marks where the temperature in the disc surrounding a young star drops sufficiently low for snow to form.
This huge increase, combined with the resolution of ALMA at long baselines, has allowed a team led by Lucas Cieza (Millennium ALMA Disk Nucleus and Universidad Diego Portales, Santiago, Chile) to make the first ever resolved observations of a water snow line in a protoplanetary disc.
Objective: The aim of this ambitious research project is to produce the most realistic computer simulations of gaseous protoplanetary accretion discs to date, and thereby define in an assertive way the environment that shapes the assembly and early evolution of planetary systems.In their role as planet nurseries, protoplanetary discs are of key interest to planet formation theory.