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High-resolution ALMA observations of V4046Sgr: a circumbinary disc with a thin ring
Rafael Martinez-Brunner, Simon Casassus, Sebastián Pérez +8
The nearby V4046 Sgr spectroscopic binary hosts a gas-rich disc known for its wide cavity and dusty ring. We present high resolution (20 mas or 1.4 au) ALMA observations of t…
The steady-state hydrodynamics of a long-lived disc: planetary system architecture and prospects of observing a circumplanetary disc shadow in V4046Sgr
Philipp Weber, Simon Casassus, Sebastián Pérez
Recent imaging of the disc around the V4046Sgr spectroscopic binary revealed concentric regions of dust rings and gaps. The object's proximity and expected equilibrated state d…
Dust entrainment in photoevaporative winds: Densities and imaging
R. Franz, B. Ercolano, S. Casassus +5
X-ray- and EUV- (XEUV-) driven photoevaporative winds acting on protoplanetary disks around young T-Tauri stars may crucially impact disk evolution, affecting both gas and dust dis…
A detailed characterization of HR 8799's debris disk with ALMA in Band 7
Virginie Faramaz, Sebastian Marino, Mark Booth +8
The exoplanetary system of HR 8799 is one of the rare systems in which multiple planets have been directly imaged. Its architecture is strikingly similar to that of the Solar Syste…
A dusty filament and turbulent CO spirals in HD135344B-SAO206462
Simon Casassus, Valentin Christiaens, Miguel Carcamo +16
Planet-disc interactions build up local pressure maxima that may halt the radial drift of protoplanetary dust, and pile it up in rings and crescents. ALMA observations of the HD135…
A faint companion around CrA-9: protoplanet or obscured binary?
V. Christiaens, M. -G. Ubeira-Gabellini, H. Cánovas +16
Understanding how giant planets form requires observational input from directly imaged protoplanets. We used VLT/NACO and VLT/SPHERE to search for companions in the transition disc…