Publications:

1. “Flares and Their Underlying Magnetic Complexity”, A.J. Engell, M. Siarkowski, M Gryciuk, J. Sylwester, B. Sylwester, L. Golub, K. Korreck, J. Cirtain, 2010, ApJ, 726:12

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2. “Hinode/XRT and STEREO Observations of a Diffuse Coronal “Wave” -Coronal Mass Ejection-Dimming Event”, G.D.R. Attrill, A.J. Engell, M.J. Wills-Davey, P. Grigis, P. Testa, 2009, ApJ, 704:1296-1308

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3. “Computer Vision for the Solar Dynamics Observatory”, P.C.H. Martens et al., 2010, Solar Phys.

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4.“Structure and Dynamics of the 2010 July 11 Eclipse White-light Corona”, J.M. Pasachoff, V. Rusin, H. Druckmüllerovå, M. Saniga, M. Lu, C. Malamut, D.B. Seaton, L, Golub, A.J. Engell, S.W. Hills, R. Lucas, 2011, ApJ, 734:114 download here

Publications:

Alexander (Alec) Julian Engell

Office: EPS 247

Telephone: (978) 621-5880

B.A., Earth and Planetary Science, Harvard College

Ph.D. Candidate, Physics (Solar Physics), Montana State University

Previous Work: High Energy Astrophysics Division, Harvard-Smithsonian Center for Astrophysics, Solar Physics, Support Scientist 2009-2011

Advisor: Petrus (Piet) Martens, http://solar.physics.montana.edu/martens/

Present Research:

Automatic Feature Detection and Analysis for SDO and Other Solar Observatories:

My module for the Feature Finding Team focuses on the location of the polarity inversion or neutral line on the solar disk using magnetograms from HMI onboard SDO. See Publication #3, section 14. I am presently combining several outputs from other modules (filaments, flares, and sigmoids) in order to achieve large statistical surveys with SDO data. My advisors for this project are Petrus Martens and Rafal Angryk (http://www.cs.montana.edu/angryk/)

Determining Photospheric Surface Diffusion from HMI Magnetograms:

By utilizing the 2D diffusion equation and relating it to the magnetic moment of active regions without flux emergence we have found initial values of 256 km^2 s^-1 with a standard variation of 3.6 km^2 s^-1. This is only an initial study of three active regions over the course of five days. Our intent is to utilize as many idealized active regions from HMI to give a statistical significant study. My advisor for this project is Dana Longcope (http://solar.physics.montana.edu/dana/).