ALMA Observations of proto-planetary disks I HD142527 – P.I. Casassus 2013 Nature 493, 191 Herbig Ae star 140 pc, 2 Myr, 1.9 M , disk mass 0.1 M  Left:

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Presentation transcript:

ALMA Observations of proto-planetary disks I HD – P.I. Casassus 2013 Nature 493, 191 Herbig Ae star 140 pc, 2 Myr, 1.9 M , disk mass 0.1 M  Left: Band 7 observations, of disk around HD142527, showing streams of gas flowing across gap in disk. Dust in outer disk in red; diffuse gas (CO) in blue; dense gas (HCO + ) in green. Synthesized beam 0”.55x0”.33. Right: Artist’s impression of the situation. © ALMA (ESO/NAOJ/NRAO)/Casassus et al Nature. ALMA Cycle0 observations + modelling show: Filamentary flow and residual gas in gap agrees with planet-formation feedback

Formalhaut -- P.I. Boley 2012 ApJL 750, L21 A3V star 7.69 pc debris ring, semi-major axis ~ 140 AU Left: Band 7 observations, of (half of) the debris disk around Formalhaut. Synthesized beam 1”.5x1”.2. Right: Sketch illustrating planets shepherding dust particles in narrow ring. © ALMA (ESO/NAOJ/NRAO) & NASA/ESA Hubble Space Tel. (left) Bill Saxton/NRAO/AUI/NSF (right) ALMA Observations of proto-planetary disks II ALMA observed half of disk, which has sharp inner- and outer edges, due to gravitational effects of two planets.

ALMA Observations of proto-planetary disks III G N – P.I. Sanchez-Monge 2013 A&A 552, L10 Fig. 1: Band 7 observations, of the high-mass star-forming region G N. Synthesized beam 0”.51x0”.46. Fig. 2. a: Peaks of CH 3 CN(19-18) K=2 line emission, with corresponding 50% Contour level. Colours correspond to l.o.s. velocity indicated on right. b: Comparison best-fit Keplerian disk and emission peaks at different velocities, for various lines. Observed hot-core tracers reveal velocity gradients. In core B, velocity field can be fitted with almost edge-on Keplerian disk (R≥2500AU, 3M  ) rotating about 18M  central mass, likely a binary system.