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
J.L. Synge was a Senior Professor in the @StpDias from 1948 to 1972. You can read some Synge's original articles detailing his research and groundbreaking discoveries on our online repository at: bit.ly/2Gzh7X6 #DIASdiscovers
'Only a 1/4 of the 120,000 people working in jobs using #STEM are women ... girls are steering clear of what could be a universe of academic and career possibilities' Great article in the @IrishTimes with a mention of our first female fellow Sheila Tinney. bit.ly/2ElqOGu
DIAS iMARL infrastructure deploying ocean bottom seismometers which detect earthquakes and major weather events, track the presence of whales and dolphins, and capture seabed images. #DIASdiscovers
Great article in today's @IrishTimes about the breakthrough in understanding #SolarStorms, that was made by DIAS in conjuction with @tcddublin and @helsinkiuni. Read it at bit.ly/2Nd86ne. #DIASdiscovers
If you missed @petertgallagher Head of @DIASAstronomy, on @drivetimerte yesterday talking about our recent breakthrough on #SolarStorms, you can listen back at: bit.ly/2Sd1Yfm #DIASdiscovers
'Intricately detailed moon photo leaves reddit users breathless' via @Forbes forbes.com/sites/fernando…
#DidYouKnow The School of Cosmic Physics at DIAS carried out the first gravity survey of Ireland and through off-shore geophysical research enabled the extension of Ireland’s ocean territory by tenfold. #DIASdiscovers
A key priority of the @SCSLibrary is the provision of reliable editions of hitherto unpublished material and texts, previously accessible only to scholars consulting the manuscripts. Learn more about the @DIAS_ISOS project at isos.dias.ie #DIASdiscovers
. @ProfBrianCox & @robinince using coffee & cream to explain how we got from the Big Bang to the universe as we know it today. Fantastic show tonight in @3ArenaDublin - masterclass in communicating complex scientific concepts effectively
@UniversalQandA Given you’re in Dublin, any comments on the legacy / influence of Schrödinger, who lived here for many years & was the first Director of @StpDias?
. @ProfBrianCox showing an image of the universe as it was 380,000 years after The Big Bang #Cosmology
“Your theory suggests there was a day without a yesterday” - Lemaître’s comment to Einstein on the Theory of Relativity, as cited by @ProfBrianCox
“9000 people have come out on a Saturday night to chat about #Cosmology - that makes me feel good about the world” - @ProfBrianCox is pleased with the turnout for his Dublin show :)
We’re excited to be @3ArenaDublin tonight for @ProfBrianCox. We know he’s a big fan of #Schrödinger, first Director of @StpDias, so looking forward to seeing if he speaks of Schrödinger‘s time in Dublin...
.@DIASDunsink Observatory is used as an outreach centre, as accommodation for visitors and for hosting research workshops and meetings. Over 4,000 visitors a year come to events such as #Solarfest, @CultureNight, @ScienceWeek and Open Nights. Learn more: bit.ly/2SAAi8s