National Aeronautics and Space Administration

Living With A Star

Targeted Research and Technology

Coupling of Particle Acceleration and Atmospheric Response Processes in Solar Flares: Combined Kinetic-fluid Modeling and Multiwavelength Observations

ROSES ID: NNH11ZDA001N      Selection Year: 2012      

Program Element: Focused Science Topic

Principal Investigator: Vahe Petrosian

Affiliation(s): Stanford University

Project Member(s):
Liu, Wei Co-I Bay Area Environmental Research Institute
Mariska, John T Collaborator null
De Pontieu, Bart Collaborator Lockheed Martin Solar & Astrophysics Lab
Pereira, Tiago M D Collaborator Universitetet i Oslo


We propose to investigate the coupling between particle acceleration and the dynamic response of the lower solar atmosphere to the energy input during flares. We propose a combined kinetic-particle and hydrodynamic simulation, and analysis of observations from different wavelengths. This work directly addresses the ``Focused Science Topic (a) Flare Dynamics in the Lower Solar Atmosphere" in the 2011 LWS TR&T solicitation. We seek answers to the following Compelling Science Questions:

1. What is the fundamental mechanism that accelerate particles in solar flares?

2. How does the lower solar atmosphere, particularly the chromosphere, respond to the impulsive energy input?

3. How are the particle acceleration and atmospheric response coupled together and affect each other?

Answering these questions will enable us to constrain the acceleration mechanism, understand the process of evaporation and seismic wave generation. The major strengths of the proposed work lie in our expertise in particle acceleration and the unique contribution this will provide for the LWS focused science topic, and our past experience in the coupling between acceleration and hydrodynamic response.


Performance YearReferenceInvestigation TypeActions
1Omodei, N.; Petrosian, V.; Pesce-Rollins, M.; the Fer...
not set


Performance YearReferenceActions
1Liu, Wei; Petrosian, V.; Chen, Q.; Mariska, J.; (2012...

Export to PDF