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Can planet formation resolve the dust budget crisis in high redshift galaxies?

Forgan, D. H., Rowlands, K., Gomez, Haley, Gomez, Edward, Schofield, S. P., Dunne, Loretta and Maddox, Steve 2017. Can planet formation resolve the dust budget crisis in high redshift galaxies? Monthly Notices of the Royal Astronomical Society 472 (2) , pp. 2289-2296. 10.1093/MNRAS/STX2162

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The process of planet formation offers a rich source of dust production via grain growth in protostellar discs, and via grinding of larger bodies in debris disc systems. Chemical evolution models, designed to follow the build up of metals and dust in galaxies, do not currently account for planet formation. We consider the possibility that the apparent under-prediction of dust mass in high redshift galaxies by chemical evolution models could be in part, due to these models neglecting this process, specifically due to their assumption that a large fraction of the dust mass is removed from the interstellar medium during star formation (so-called astration). By adding a planet formation phase into galaxy chemical evolution, we demonstrate that the dust budget crisis can be partially ameliorated by a factor of 1.3-1.5 only if a)circumstellar discs prevent a large fraction of the dust mass entering the star during its birth, and b) that dust mass is preferentially liberated via jets, winds and outflows rather than accreted into planetary-mass bodies.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Publisher: Oxford University Press
ISSN: 0035-8711
Date of First Compliant Deposit: 24 August 2017
Date of Acceptance: 21 August 2017
Last Modified: 25 Nov 2020 17:06

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