protoplanetary disk

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protoplanetary disk

[‚prōd·ō‚plan·ä‚ter·ē ′disk]
(astronomy)
References in periodicals archive ?
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.
Although this star has been well-studied in the past, SPHERE allowed the team to see the stars protoplanetary disc in more detail than ever before.
Over time, the particles in these protoplanetary discs collide, combine and eventually build up into planet-sized bodies.
The heat from a typical young solar-type star means that the water within a protoplanetary disc is gaseous up to distances of around 3 au from the star less than 3 times the average distance between the Earth and the Sun or around 450 million kilometres.
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.
Team member Dr John Ilee, also of St Andrews, is working on a related European project to investigate protoplanetary discs around young stars.
Encouraged by those findings, Alexander and Pascucci then used the ALICE High Performance Computing Facility at the University of Leicester to simulate protoplanetary discs undergoing accretion of material to the central star that took the effects of photo-evaporation into account.
2003) The effect of cooling on the global stability of self-gravitating protoplanetary discs.
In their role as planet nurseries, protoplanetary discs are of key interest to planet formation theory.