The extremely truncated circumstellar disc of V410 X-ray 1: a precursor to TRAPPIST-1?
D. M. Boneberg, S. Facchini, C. J. Clarke, J. D. Ilee, R. A. Booth, S., Bruderer

TL;DR
This study examines the highly truncated protoplanetary disc around V410 X-ray 1, proposing it as a potential precursor to tightly-packed planetary systems like TRAPPIST-1, and explores scenarios explaining its truncation.
Contribution
It introduces a detailed analysis of a very truncated disc around a very low mass star, proposing two plausible scenarios for its origin and implications for planet formation.
Findings
The disc has an outer radius of only 0.6 au.
Both truncation and snowline scenarios fit the observed SED.
Potential for several Earth-masses of dust interior to 0.6 au.
Abstract
Protoplanetary discs around brown dwarfs and very low mass stars offer some of the best prospects for forming Earth-sized planets in their habitable zones. To this end, we study the nature of the disc around the very low mass star V410 X-ray 1, whose SED is indicative of an optically thick and very truncated dust disc, with our modelling suggesting an outer radius of only 0.6 au. We investigate two scenarios that could lead to such a truncation, and find that the observed SED is compatible with both. The first scenario involves the truncation of both the dust and gas in the disc, perhaps due to a previous dynamical interaction or the presence of an undetected companion. The second scenario involves the fact that a radial location of 0.6 au is close to the expected location of the HO snowline in the disc. As such, a combination of efficient dust growth, radial migration, and…
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