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The importance of episodic accretion for low-mass star formation

Stamatellos, Dimitrios, Whitworth, Anthony Peter and Hubber, David Anthony 2011. The importance of episodic accretion for low-mass star formation. Astrophysical Journal 730 (1) , 32. 10.1088/0004-637X/730/1/32

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Abstract

A star acquires much of its mass by accreting material from a disk. Accretion is probably not continuous but episodic. We have developed a method to include the effects of episodic accretion in simulations of star formation. Episodic accretion results in bursts of radiative feedback, during which a protostar is very luminous, and its surrounding disk is heated and stabilized. These bursts typically last only a few hundred years. In contrast, the lulls between bursts may last a few thousand years; during these lulls the luminosity of the protostar is very low, and its disk cools and fragments. Thus, episodic accretion enables the formation of low-mass stars, brown dwarfs, and planetary-mass objects by disk fragmentation. If episodic accretion is a common phenomenon among young protostars, then the frequency and duration of accretion bursts may be critical in determining the low-mass end of the stellar initial mass function

Item Type: Article
Date Type: Publication
Status: Published
Schools: Advanced Research Computing @ Cardiff (ARCCA)
Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Accretion, Accretion disks; Brown dwarfs; Hydrodynamics; methods: Numerical; Radiative transfer; Stars: formation; Stars: low-mass; Stars: protostars
Publisher: IOP Science
ISSN: 0004-637X
Last Modified: 04 Jun 2017 02:00
URI: http://orca.cf.ac.uk/id/eprint/7369

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