Disks, Dynamos, and Data: Confronting MHD Accretion Theory with Observations

Coordinators: Catherine Espaillat, Christian Knigge, Jim Stone, and Jean-Pierre Lasota-Hirszowicz

Accretion powers a wide range of astrophysical sources, from young stellar objects to quasars and active galactic nuclei (AGN). Over the past few decades, theoretical modeling of accretion flows has shown that magnetohydrodynamic (MHD) processes are crucial for angular momentum transport and for driving and collimating mass outflows and jets. Advances in numerical algorithms for MHD and computer hardware over this same time frame have enabled detailed time-dependent and three-dimensional modeling of MHD accretion flows, including radiation transport. In addition, new and advanced observational facilities such as ALMA, EVLA, NuSTAR, and the EHT are providing rich data sets that both challenge and constrain the theoretical models. The time is ripe for detailed comparisons between the results of MHD accretion models with the latest observational data.

This conference will bring together both theorists and observers to present and discuss the latest models and observations of accretion disks in a variety of systems, including young stellar objects, close binaries (such as dwarf novae and X-ray binaries), and AGN. The focus will be on connecting and confronting results from theory with the observational data, in order to assess the success, the puzzles, and the future of MHD accretion theory.

PLEASE NOTE: During the conference there will be an opportunity to present a poster. If you are interested in presenting a poster please visit the conference website and submit your title and abstract. Each poster board is 4 feet high x 6 feet wide. We ask that the posters be no larger than 44 inches high x 34 inches wide at the most.


2017

Monday, Feb 06, 2017

  • Chair: Jim Stone (Princeton) 08:50AM Protoplanetary Disks I Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 08:50AM Lars Bildsten (KITP) Welcome
    • 09:00AM Meredith Hughes (Wesleyan) Observational constraints on turbulence in protoplanetary disks from spatially resolved molecular-line observations
    • 09:45AM Neal Turner (JPL/Caltech) Detecting transport processes at work in protostellar disks
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM Ilsedore Cleeves (CfA/Harvard) Disk-ionization properties as revealed by molecular emission in disks
    • 11:45AM Geoffroy Lesur (Grenoble) Global dynamics of protoplanetary disks: The combined influence of non-ideal MHD and winds
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • Chair: Neal Turner (JPL/Caltech) 02:00PM Protoplanetary Disks II Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 02:00PM Xuening Bai (CfA/Harvard) Towards the most realistic MHD simulations of protoplanetary disks
    • 02:45PM Richard Nelson (Queen Mary London) Turbulence in protoplanetary disks: the roles and influence of the vertical shear (VSI) and spiral wave instabilities (SWI)
  • 03:30PM AFTERNOON BREAK KITP Courtyard

     

  • 04:00PM Main Seminar Room

     

    • 04:00PM Catherine Espaillat (Boston U.) Footprints of the magnetosphere: The star-disk connection in young accreting objects
    • 04:45PM Chris Johns-Krull (Rice) Magnetically controlled accretion onto young stars: Testing current models
  • 05:30PM SHUTTLE TO BWSCI KITP Courtyard

     

2017

Monday, Feb 06, 2017

  • Chair: Jim Stone (Princeton) 08:50AM Protoplanetary Disks I Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 08:50AM Lars Bildsten (KITP) Welcome
    • 09:00AM Meredith Hughes (Wesleyan) Observational constraints on turbulence in protoplanetary disks from spatially resolved molecular-line observations
    • 09:45AM Neal Turner (JPL/Caltech) Detecting transport processes at work in protostellar disks
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM Ilsedore Cleeves (CfA/Harvard) Disk-ionization properties as revealed by molecular emission in disks
    • 11:45AM Geoffroy Lesur (Grenoble) Global dynamics of protoplanetary disks: The combined influence of non-ideal MHD and winds
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • Chair: Neal Turner (JPL/Caltech) 02:00PM Protoplanetary Disks II Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 02:00PM Xuening Bai (CfA/Harvard) Towards the most realistic MHD simulations of protoplanetary disks
    • 02:45PM Richard Nelson (Queen Mary London) Turbulence in protoplanetary disks: the roles and influence of the vertical shear (VSI) and spiral wave instabilities (SWI)
  • 03:30PM AFTERNOON BREAK KITP Courtyard

     

  • 04:00PM Main Seminar Room

     

    • 04:00PM Catherine Espaillat (Boston U.) Footprints of the magnetosphere: The star-disk connection in young accreting objects
    • 04:45PM Chris Johns-Krull (Rice) Magnetically controlled accretion onto young stars: Testing current models
  • 05:30PM SHUTTLE TO BWSCI KITP Courtyard

     

2017

Tuesday, Feb 07, 2017

  • Chair: Catherine Espaillat (Boston U.) 09:00AM Protoplanetary Disks III Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 09:00AM Natalia Dzyurkevich (MPIA) What molecular-cloud collapse can teach us about initial conditions for planet formation in disks
    • 09:45AM Joan Najita (NOAO) Spectroscopic probes of turbulence in the planet-formation region of disks
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM Zhaohuan Zhu (UNLV) Young planets in protoplanetary disks: Theory confronts observations
    • 11:45AM Ted Bergin (Michigan), Lee Hartmann (Michigan) Discussion Session
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • Chair: Christian Knigge (Soton) 02:00PM Close Binaries I Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 02:00PM Paula Szkody (Washington) Intriguing light curves of dwarf novae: Testbeds for accretion disk theories
    • 02:45PM Matt Coleman (UCSB) Convection modifies MHD turbulence in accretion disks
  • 03:30PM AFTERNOON BREAK KITP Courtyard

     

  • 04:00PM Main Seminar Room

     

    • 04:00PM Nick Higginbottom (Soton) Thermal disk winds in X-ray binaries: Realistic heating and cooling rates give rise to slow, but massive outflows
    • 04:45PM Daniel Proga (UNLV) Radiation driven winds from MHD accretion disks
  • 05:30PM POSTER SESSION / RECEPTION KITP Courtyard

     

  • 06:00PM SPECIAL EVENTS DINNER KITP Courtyard

     

  • 08:00PM SHUTTLE TO BWSCI KITP Courtyard

     

2017

Wednesday, Feb 08, 2017

  • Chair: Paula Szkody (U. Washington) 09:00AM Close Binaries (II) Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 09:00AM Fiona Harrison (Caltech) Ultraluminous X-ray sources: Recent progress and new puzzles
    • 09:45AM Aleksander Sadowski (MIT) Simulations of radiative accretion flows at the lowest and not-so-low accretion rates
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM Paul Groot (Radboud) Observations of spiral density waves and dynamic behavior of accretion disks in (ultra) compact binaries
    • 11:45AM Christian Knigge (Univ. of Southampton), J.-P. Lasota (CNRS) Discussion Session
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • 02:00PM FREE AFTERNOON-SHUTTLE AVAILABLE TO BWSCI KITP Courtyard

     

2017

Thursday, Feb 09, 2017

  • Chair: Charles Gammie (Illinois) 09:00AM Disks in AGN I Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 09:00AM Chris Done (Durham) Black-hole observations and MRI simulations
    • 09:45AM Omer Blaes (UCSB) Theoretical issues in luminous AGN accretion flows
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM Chelsea MacLeod (CfA/Harvard) A systematic search for changing-look quasars in SDSS
    • 11:45AM George Chartas (College of Charleston) Quasar accretion-disk tomography
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • Chair: Monika Moscibrodzka (Radboud) 02:00PM Disks in AGN II Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 02:00PM Chris Reynolds (Maryland) Towards a first principles understanding of variability from accreting black holes
    • 02:45PM Anna Pancoast (CfA/Harvard) Disks in the broad-line region of AGN
  • 03:30PM AFTERNOON BREAK KITP Courtyard

     

  • 04:00PM Main Seminar Room

     

    • 04:00PM Alexander Tchekhovskoy (LBL) What makes a good jet?
    • 04:45PM Yan-fei Jiang (KITP) Resolving puzzles of AGN observations based on 3D global radiation MHD simulations of accretion disks
  • 05:30PM POSTER SESSION / RECEPTION KITP Courtyard

     

  • 06:00PM SPECIAL EVENTS DINNER KITP Courtyard

     

  • 08:00PM SHUTTLE TO BWSCI KITP Courtyard

     

2017

Friday, Feb 10, 2017

  • Chair: Omer Blaes (UCSB) 09:00AM Disks in AGN III Main Seminar Room

    Talks are 30 min + 15 min discussion

    • 09:00AM Charles Gammie (Illinois) Simulations of low accretion rate-black holes
    • 09:45AM Monika Moscibrodzka (Radboud) Polarization of light and Faraday rotation in GRMHD simulations of the jet launching zone of M87
  • 10:30AM MORNING BREAK KITP Courtyard

     

  • 11:00AM Main Seminar Room

     

    • 11:00AM Jason Dexter (MPE) Testing MHD accretion theory with event-horizon scale observations of low-luminosity AGN
    • 11:45AM Chris Done (Durham Univ.), Chris Reynolds (Maryland) Discussion Session
  • 12:30PM LUNCH BREAK KITP Courtyard

     

  • 02:00PM CONFERENCE END-SHUTTLE TO BWSCI *Also available to SB Airport and SB Airbus, Goleta location (See Registration Desk to sign up.) KITP Courtyard

     

2017

Saturday, Feb 11, 2017

No talks scheduled.

2017

Sunday, Feb 12, 2017

No talks scheduled.