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A triple star system with a misaligned and warped circumstellar disk shaped by disk tearing

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arxiv 2004.01204 v2 pith:ZPQXBA77 submitted 2020-04-02 astro-ph.SR astro-ph.GA

A triple star system with a misaligned and warped circumstellar disk shaped by disk tearing

classification astro-ph.SR astro-ph.GA
keywords disktearingmisalignedstarwarpedcircumstellarorbitalplanets
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Young stars are surrounded by a circumstellar disk of gas and dust, within which planet formation can occur. Gravitational forces in multiple star systems can disrupt the disk. Theoretical models predict that if the disk is misaligned with the orbital plane of the stars, the disk should warp and break into precessing rings, a phenomenon known as disk tearing. We present observations of the triple star system GWOrionis, finding evidence for disk tearing. Our images show an eccentric ring that is misaligned with the orbital planes and the outer disk. The ring casts shadows on a strongly warped intermediate region of the disk. If planets can form within the warped disk, disk tearing could provide a mechanism for forming wide-separation planets on oblique orbits.

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