LWS Workshop 2013

  Understanding the Dynamics of the Sun using Helioseismology and MHD Simulations

NASA Ames Research Center, Moffett Field, CA, USA

   February 11 - 15, 2013

The goals of this workshop are to discuss and stimulate further development of helioseismology methods, solar interior models, and realistic numerical simulations. These goals are particularly important for analysis of the continuous data flow from the Solar Dynamics Observatory, development and verification of helioseismology methods, and for theoretical interpretation of observations and inversion results.

The workshop will be held at the NASA Ames Research Park, Bld. 152 (200 Daley Road, Moffett Field, Mountain View, CA 94035, USA). 

For providing access to the NASA Research Center during the workshop we request that all Foreign National (non-US citizens and non-Green-Card holders) contact Nagi Mansour (Nagi.N.Mansour@nasa.gov) and Gina Morello (gina.f.morello@nasa.gov) by e-mail  as soon as possible.

For directions, maps, and access see: http://sun.stanford.edu/LWS2013/logistics.html

For the local information, maps, hotels etc, please, check the the NASA Ames Conference Center web site: http://naccenter.arc.nasa.gov/.

Workshop Agenda

Monday, Feb.11
4:30 pm-6:30 pm - Registration and Reception at the NASA Visitor's Exploration Center, located at the main gate to NASA's Ames Research Center at Moffett Field, California.

Tuesday, Feb.12
9:00am - 9:10am - Opening

Session 1: MHD Simulations and Space Weather Applications

9:10am - 10:10am: The Coronal Global Evolutionary Model (CGEM) - George Fisher (UC Berleley)

10:10am - 10:40am: A Convective Dynamo Simulation of a Cyclic Solar Dynamo - Yuhong Fan (NCAR)

10:40am - 11:00am: Coffee break

11:00am - 11:30am: Approach to Integrate Global-Sun Models of Magnetic Flux Emergence and Transport for Space Weather Studies - Nagi Mansour (NASA Ames Research Center)

11:30am - 12:30pm: Active Region Emergence - Robert Stein (Michigan State University)

12:30pm - 2:00pm: Lunch break

2:00pm - 2:30pm: Solar-Cycle Variation of Zonal and Meridional Flow - Rudolf Komm (NSO)

2:30pm - 3:00pm: On the Storage of Dynamo-Generated Magnetic Tubes in Differentially Rotating Stars - Edisher Kaghashvili (Atmospheric and Environmental Research, Inc)

3:00pm - 3:30pm: Energy Buildup in Active Regions: A Comparison of AR11158 with a Simulation of Magnetic Flux Emergence - Ward Manchester (University of Michigan)

3:30pm - 4:00pm: Numerical Simulations of Small-Scale Magnetic Fields on the Sun - Irina Kitiashvili (Stanford University)

4:00pm - 4:30pm: Coffee break

4:30pm - 5:00pm: Magnetic Helicity in the Emerging Active Regions in the Sun: A Statistical Study - Yang Liu (Stanford University)

5:00pm - 5:30pm: Circular Ribbon Flares and Homologous Jets - Haimin Wang (NJIT)

5:30pm - 6:00pm: On the Acceleration of Solar Energetic Particles During Halloween Storms - Ahmed Hady (Cairo University)

Wednesday, Feb.13

Session 2: Advances in Helioseismology Analyses and Data Processing

9:00am - 10:00am: Review of Ring-Diagram Analysis - Richard Bogart (Stanford University)

10:00am - 10:30am: Assessing Results From the Ring-Diagram Fitting Methods - Kiran Jain (NSO)

10:30am - 11:00am: Coffee break

11:00am - 11:30am: Understanding the Dynamics of Supergranulation Using Helioseismology and Linear Acoustic Simulations - Thomas Duvall (NASA/GSFC)

11:30am - 12:00noon: Alignment of Sub-Surface Convection from Ring-Diagram Analysis - Benjamin Greer (JILA, CU Boulder)

12:00noon - 12:30pm: Comparison of Meridional and Zonal Subsurface Flow Results via Ring Diagram Analysis from the 60' Solar Tower at MWO to Reprocessed MDI Results - Stephen Pinkerton (USC)

12:30pm - 2:00pm: Lunch break

2:00pm - 3:00pm: Review of Time-Distance Helioseismology and Detection of Equator-ward Meridional Flows in the Solar Interior - Junwei Zhao (Stanford University)

3:00pm - 3:30pm: How Best to Utilize Time-Distance Inversions? - Jason Jackiewicz (New Mexico State University)

3:30pm - 4:00pm: Time-Distance Helioseismology of Realistic Solar Simulations - Kyle DeGrave (New Mexico State University)

4:00pm - 4:30pm: Coffee break

4:30pm - 5:00pm: On the Nature of Detected Pre-emergence Signatures of Magnetic Flux - Stathis Ilonidis (Stanford University)

5:00pm - 5:30pm: Perturbations in the Wave Parameters Near Active Regions - Cristina Rabello-Soares (UFMG, Brazil)

5:30pm - 6:00pm: Characteristics of Chromospheric Activity Over Nearly Two Hale Cycles - Jeff Scargle (NASA Ames Research Center)

Thursday, Feb.14

Session 3: Helioseismology and Global Dynamics

9:00am - 10:00am: On Using Numerical Wave-Propagation Simulations to Address  the Sunspot Seismology Controversy  - Doug Braun (CoRA)

10:00am - 10:30am: Preparing the Helioseismic Far-Side Maps for Input to Solar Models - Irene Gonzalez Hernandez (NSO)

10:30am - 11:00am: Coffee break

11:00am - 11:30am: Measurements of Scattering Matrix of Sunspots - Dean-Yi Chou (National Tsing Hua University, Taiwan)

11:30am - 12:00noon: Magnetic and Thermal Effects of MHD Wave Propagation, Scattering, and Transformation in Different Models of Sunspots - Konstantin Parchevsky (Stanford University)

12:00noon - 12:30pm: Analysis of Sunquakes Events Observed From SDO - Alexander Kosovichev (Stanford University)

12:30pm - 2:00pm: Lunch break

2:00pm - 3:00pm: Review of Global Dynamics and Dynamo Modeling - Mark Miesch (NCAR)

3:00pm - 3:30pm: Non-Standard Thermodynamic Structure of the Solar Subsurface Shear Layer - Edward Rhodes (USC)

3:30pm - 4:00pm: Solar Differential Rotation, Hints to Reproduce a Near-surface Shear Layer in Global Simulations - Gustavo Guerrero (Stanford University)

4:00pm - 4:30pm: Coffee break

4:30pm - 5:00pm:  Center-to-limb Variations in Travel Time Measurements and Deep Meridional Flow - Shukur Kholikov (NSO)

5:00pm - 5:30pm: Synthetic Helioseismology Data from Numerical Simulations of Wave Propagation Through Meridional and Large-scale Flows - Thomas Hartlep (Stanford University)

6:00pm - 8:00pm: Group dinner at a local restaurant in Mountain View

Friday, Feb.15
Splinter Group Meetings at Stanford

1. SDO Local Helioseismology Data Analysis (Cedar Meeting Room): Rick Bogart
2. Numerical MHD Simulations (Cypress Meeting Room): Nagi Mansour
3. LWS Flare Dynamics FST (Physics & Astrophysics, 133): Haimin Wang

Registered Participants

For further information about the workshop, please, contact Nagi Mansour (Nagi.N.Mansour@nasa.gov), Rudi Komm (rkomm@nso.edu) or Alexander Kosovichev (sasha@sun.stanford.edu).