Richard A. Frazin

Office:

1411C SRB

Phone:

647-9689

Fax:

647-3083

Email:

rfrazin@umich.edu

Education:

PhD, Astronomy, University of Illinois at Urbana-Champaign
MS, Physics, Georgia State University
BS, Physics, Mathematics and Astronomy, University of Wisconsin-Madison 

Research:

I have always been fascinated by how scientists learn about the Universe we all share.  After all, no one  can measure the  temperature in the center of a star or see subatomic particles.  This curiosity about the scientific learning process naturally led me to questions about the information content of various types of data.  In particular, I have been researching issues that involve retrieving 3D (and more D) information from many types of 2D images of the Sun.

Specializations and Research Interests

• Tomographic Reconstruction of the 3D solar corona from mutli-spacecraft/multi-wavelength data
• Time-dependent tomography
• Data Assimilation
• Statistical signal processing in astrophysics

Publications

(Selected)

1. Cohen, O., Sokolov, I.V., Roussev, I.I., Arge, C.N., Manchester, W.B., Gombosi, T.I., Frazin, R.A., Park, H., Butala, M.D., Kamalabadi, F. & Velli, M., “A Semi-Empirical Magnetohydrodynamical Model of the Solar Wind,” The Astrophysical Journal Letters, vol. 654, pp. 163-166 (2007)
2. Frazin, R.A., Butala, M.D., Kemball, A. & Kamalabadi, F., “Time-Dependent Reconstruction of Non-Stationary Objects with Tomographic or Interferometric Measurements,” The Astrophysical Journal Letters, vol. 635, pp. 197-200 (2005)
3. Frazin, R.A. & Kamalabadi, F. “Rotational Tomography for 3D Reconstruction of the White-Light and EUV Corona in the post-SOHO Era,” Solar Physics, vol. 228, pp. 221-239 (2005)
4. Frazin, R.A., Kamalabadi, F. & Weber, M.A., “On the Combination of Differential Emission Measure Analysis and Rotational Tomography for 3D Solar EUV Imaging,” The Astrophysical Journal, vol. 628, pp. 1070-1080 (2005)
5. Butala, M.D., Frazin, R.A. & Kamalabadi, F. “Three-Dimensional Estimates of the Coronal Electron Density at Times of Extreme Solar Actvity,” Journal of Geophysical Research, 110, DOI: 10.1029/2004JA010938 (2005)
6. Frazin, R.A. & Kamalabadi, F. “On the Use of Total Brightness Measurements for Tomography of the Solar Corona,” The Astrophysical Journal, vol. 628, pp. 1061-1069 (2005)
7. Frazin, R.A., Fischer, D.G., & Carney, P.S. “Information Content of the Near-Field: Three-Dimensional Samples,” in preparation for The Journal of the Optical Society of America A (2005)