Dr. Stefano Facchini
Max Planck Institute for Extraterrestrial Physics, Germany
The interplay between gas and dust in protoplanetary disks
Abstract:
The high sensitivity and angular resolution of ALMA and optical and NIR imagers are providing new insights on the typical properties of protoplanetary disks. A plethora of substructures are currently being observed, ranging from rings and gaps to spirals and strong azimuthal asymmetries. Most of these features have been characterized in continuum emission, from optical to cm wavelengths, and many models have been invoked to explain their origin. A key observational diagnostic to discriminate between the different models are spatially resolved molecular line emission, which can directly probe the gas temperature and density structure. In this talk I will show how the combination of continuum and CO observations can put stringent constraints on the physical origin of these substructures, in particular rings, gaps and azimuthal asymmetries. In the hypothesis of embedded planets sculpting the disk, the combined information of gas and dust can be used to infer the mass of the purported planet(s). Both dynamical and thermal coupling between gas and dust has to be considered when interpreting the observations and correctly estimate fundamental disks properties as simple as their outer radius.
Location: 31 Fitzwilliam Place, Dublin 2
Upcoming seminars:
https://www.dias.ie/2018/03/07/astronomy-and-astrophysics-seminar-schedule-2018/
Leave a Comment
Last Updated: 11th June 2018 by Patrick Kavanagh
2018-06-12, 15:00, Dr. Stefano Facchini (MPE, Germany), The interplay between gas and dust in protoplanetary disks
Dr. Stefano Facchini
Max Planck Institute for Extraterrestrial Physics, Germany
The interplay between gas and dust in protoplanetary disks
Abstract:
The high sensitivity and angular resolution of ALMA and optical and NIR imagers are providing new insights on the typical properties of protoplanetary disks. A plethora of substructures are currently being observed, ranging from rings and gaps to spirals and strong azimuthal asymmetries. Most of these features have been characterized in continuum emission, from optical to cm wavelengths, and many models have been invoked to explain their origin. A key observational diagnostic to discriminate between the different models are spatially resolved molecular line emission, which can directly probe the gas temperature and density structure. In this talk I will show how the combination of continuum and CO observations can put stringent constraints on the physical origin of these substructures, in particular rings, gaps and azimuthal asymmetries. In the hypothesis of embedded planets sculpting the disk, the combined information of gas and dust can be used to infer the mass of the purported planet(s). Both dynamical and thermal coupling between gas and dust has to be considered when interpreting the observations and correctly estimate fundamental disks properties as simple as their outer radius.
Location: 31 Fitzwilliam Place, Dublin 2
Upcoming seminars:
https://www.dias.ie/2018/03/07
Category: Seminars, Uncategorised
Our visiting guest, Professor John McCloskey @EdinburghUni spoke to @NewstalkFM @SeanMoncrieff this afternoon about the unpredictability of volcanoes! Don’t miss his talk tonight - 6.30pm @TCD_physics, organised by @dias_geophysics. Full details: bit.ly/2AqmORP
@AdeODubhghaill You seem to have made a good start!
DIAS is the world’s foremost academic publisher in the field of #CelticStudies. 400 books have been published by our School of Celtic Studies. #DIASdiscovers
At DIAS, our mission is to push the boundaries of current understanding in our specialist disciplines and to conduct fundamental research to the highest international standards. #DIASdiscovers
Don't forget that the "Forecasting the Unpredictable: earthquake science in a crowded world" public lecture is being given tomorrow in @tcddublin by Professor John McCloskey, Chair in Natural Hazards Science at @EdinburghUni. All info at bit.ly/2QphEQJ. #DIASdiscovers
Cornelius Lanczos was a Senior Prof at the @StpDias from 1954 to 1968. #DIASdiscovers
.@petertgallagher, Senior Professor @DIAS_Astronomy has a letter in the @IrishTimes on the distinguished astronomical heritage that Ireland has in our observatories at Dunsink, Armagh and Birr, and the contribution they have made to our country. #DIASdiscovers twitter.com/petertgallaghe…
‘The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists’ – Erwin Schrodinger. Schrodinger was the first Director of Theoretical Physics at DIAS. #DIASdiscovers
At DIAS we contribute to the implementation of a range of national strategies and road maps – Innovation 2020, the National Strategy for Higher Education 2030, the Action Plan for Education and the Global Island policy. We have the future of Ireland at the core of our vision.
We have a rich legacy in space tech development at DIAS.Currently @dias_astronomy has a detector development group is developing hardware for the ARIEL satellite mission, & is collaborating to develop hardware and software for the James Webb Space Telescope. #DIASdiscovers
The Irish Script on Screen, has digitised 400 manuscripts, and has in excess of 4million hits annually from over 150 countries. Tuilleadh eolas ar seo le fáil anseo: bit.ly/2QhGaDf #DIASdiscovers @DIAS_ISOS @SCSLibrary
J.L. Synge published his ’Relativity: The General Theory’ in 1960 and for more than a decade DIAS became the leading world centre for research in general relativity. #DIASdiscovers
At DIAS our mission is to provide a neutral dedicated #research space and a conducive intellectual environment for local and international researchers to conduct advanced studies, explore ideas, and engage in unconstrained thought. #DIASdiscovers
Thank you Luke.We're certainly looking forward to it. Hoping you might make the next one. twitter.com/Luke_Drury/sta…