Letters of Intent for 2015

LoI 2015-215
Protoplanetary Disks: Structure, Transport and Chemistry

Date: 3 August 2015 to 14 August 2015
Location: Honolulu, HI, United States
Contact: Hubert Klahr (klahr@mpia.de)
Coordinating division: Division F Planetary Systems and Bioastronomy
Chair of SOC: Hubert Klahr (Max-Planck-Institut für Astronomie)
Chair of LOC: ()



1.) Molecular observations as probes of gas physics and the chemical connections
to our solar system and others.
2.) Theory of transport mechanisms in disks (MHD and non-MHD) incl. “Dead- Zones”.
3.) Results from the Herschel mission, from ALMA, JVLA but also other mm arrays.
4.) VLTI and Subaru/VLT images, SEEDS - observations.
5.) Observational detection and measurement of turbulence in disks.
6.) Observation and modeling of structures in disks (zonal flows / vortices)
7.) Planet-disk interactions, disk instability, time variabilities
8.) Dust transport and size segregation
9.) Chemistry in disks, snow-lines and abundance gradients.  This should explicitly also include the dust and ices.
10.) Inner regions of disks: The interplay of accretion onto the star and planetary formation in connection with jets and outflows.



-preliminary rational as of Sep. 15th 2015-

We propose to organize an IAU symposium during the 2015 General Assembly on Hawaii, i.e. 3.5 days during the General Assembly at some time in two weeks of August 3-14, 2015 on the topic of Protoplanetary Disks, because so much progress and discoveries are happening in this field right now. We want to discuss recent observational and theoretical results on disk structure, disk transport processes and chemistry in those planet forming disks. These new results became only recently possible in the advent of new instruments and achievements in the modeling work.
One focus will be on transport and chemistry, that will be hot and new at that time with all the new ALMA (Atacama Large Millimeter Array) data coming in and the sophisticated models to decipher the data. More and more structures are getting detected and seek for a proper theoretical modeling.

Current observations observation on molecular abundance in disks serves as probes of gas physics and helps us to understand the chemical connections to our solar system and others.

A focus on the physics of the inner regions is of special interest because of the convergence of theories and observations. The link between accretion and the star on one hand but also on the other hand with planetary formation and connection with jets and outflows makes the inner region of disks a place to be investigate in details.

We contacted a range of specialists in this field to get their support for such a meeting and to have a representative input for the topic list for this IAU-Symposium. So far we have been collecting supportive letters from:

Motohide Tamura (Japan)
Carsten Dominik (Netherlands)
Ted Bergin (USA)
Neal Turner (USA)
Fabien Malbet (France)
Stephane Guilloteau (France)

Those colleagues could also potentially serve on a SOC in the further planning of this meeting, and we anticipate that the list of SOC members still will get complemented by additional members of the scientific community by the time of the final proposal.

In conclusion we advertise our IAU Symposium on Protoplanetary Disks as a timely international event to give some highlight to the observational and theoretical achievements of the community on processes in planet forming disks.