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A kinematic excess in the annular gap and gas depleted cavity in the disc around HD 169142
Himanshi Garg, Christophe Pinte, Iain Hammond +6
We present ALMA band 6 images of the 12CO, 13CO and C18O J=2-1 line emissions for the circumstellar disc around HD 169142, at ~8 au spatial resolution. We resolve a central gas dep…
Sustained FU Orionis-type outbursts from colliding discs in stellar flybys
Elisabeth M. A. Borchert, Daniel J. Price, Christophe Pinte +1
We perform 3D hydrodynamics simulations of disc-disc stellar flybys with on-the-fly Monte Carlo radiative transfer. We show that pre-existing circumstellar discs around both stars…
Investigating 2M1155-7919B: a Nearby, Young, Low-Mass Star Actively Accreting from a Nearly Edge-on, Dusty Disk
D. Annie Dickson-Vandervelde, Joel H. Kastner, Jonathan Gagné +5
We investigate the nature of an unusually faint member of the Cha Association ( pc, age Myr), the nearest region of star formation of age 8 Myr. This objec…
The Origin of the Doppler-flip in HD 100546: a large scale spiral arm generated by an inner binary companion
Brodie J. Norfolk, Christophe Pinte, Josh Calcino +9
Companions at sub-arcsecond separation from young stars are difficult to image. However their presence can be inferred from the perturbations they create in the dust and gas of pro…
External or internal companion exciting the spiral arms in CQ Tau?
Iain Hammond, Valentin Christiaens, Daniel J. Price +9
We present new high-contrast images in near-infrared wavelengths ( = 1.04, 1.24, 1.62, 2.18 and 3.78m) of the young variable star CQ Tau, aiming to constrain the presence of…
Kinematic evidence for an embedded planet in the IM Lupi disc
Harrison J. Verrios, Daniel J. Price, Christophe Pinte +2
We test the hypothesis that an embedded giant planet in the IM Lupi protostellar disc can produce velocity kinks seen in CO line observations as well as the spiral arms seen in sca…