Super-Earths in the TW Hya disc - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Monthly Notices of the Royal Astronomical Society: Letters Year : 2019

Super-Earths in the TW Hya disc


We test the hypothesis that the sub-millimetre thermal emission and scattered light gaps seen in recent observations of TW Hya are caused by planet-disc interactions. We perform global three-dimensional dusty smoothed particle hydrodynamics simulations, comparing synthetic observations of our models with dust thermal emission, CO emission, and scattered light observations. We find that the dust gaps observed at 24 au and 41 au can be explained by two super-Earths (∼ 4 M). A planet of approximately Saturn-mass can explain the CO emission and the depth and width of the gap seen in scattered light at 94 au. Our model produces a prominent spiral arm while there are only hints of this in the data. To avoid runaway growth and migration of the planets we require a disc mass of ≲ 10^{-2} M_{⊙} in agreement with CO observations but 10-100 times lower than the estimate from HD line emission.
Fichier principal
Vignette du fichier
sly209.pdf (1.75 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03703885 , version 1 (24-06-2022)



Daniel Mentiplay, Daniel J. Price, Christophe Pinte. Super-Earths in the TW Hya disc. Monthly Notices of the Royal Astronomical Society: Letters, 2019, 484, pp.L130-L135. ⟨10.1093/mnrasl/sly209⟩. ⟨insu-03703885⟩
15 View
8 Download



Gmail Facebook Twitter LinkedIn More