Dr. Edward J. Wollack

Astrophysics Science Division
NASA/GSFC
Code 665, Observational Cosmology Laboratory
Greenbelt, MD 20771

tel: 301-286-1379
fax: 301-286-7230
e-mail: Edward.J.Wollack @ nasa.gov

Present Position

Astrophysicist, NASA Goddard Space Flight Center

Brief Bio

Dr. Wollack's research activities are directed toward the development and use of precision imaging systems for astrophysics. In 2002 he received the NASA Exceptional Achievement Medal for his contributions to the WMAP (Wilkinson Microwave Anisotropy Probe) Mission. Prior to these efforts, at the National Radio Astronomy Observatory, Central Development Laboratory in Charlottesville, Virginia he concentrated on low noise millimeter-wavelength receivers. Here he contributed to the design, fabrication, and characterization of cryogenic millimeter-wave High-Electron-Mobility-Transistor (HEMT) amplifiers for ground based and space-based applications.

Educational Background

Ph.D. Physics (1994), Princeton
B.S. Physics with honors, minor Mathematics (1987), University of Minnesota, Institute of Technology

Research Interests

• Cosmic Microwave Background: spectrum, anisotropy, polarization
• Astrophysical Observational: large scale galactic emission, mapping techniques
• Low-Noise Instrumentation: long-wavelength optics, radiometry and precision flux calibration
• Sensors: detection of millimeter/submillimeter radiation, device noise theory, coupling structure and absorbers, electromagnetic modeling, novel symmetric-waveguide-polarization-diplexers and modulators

Current Projects

Wilkinson Microwave Anisotropy Probe (WMAP), Science Team
Atacama Cosmology Telescope (ACT)
Detector Development for Long Wave Astronomical Applications

Selected Publications

"Design and Calibration of a Cryogenic Blackbody Calibrator at Centimeter Wavelengths", A. Kogut, E. Wollack, D.J. Fixsen, M. Limon, P. Mirel, S. Levin, M. Seiffert, and P.M. Lubin, 2004, Review of Scientific Instruments, 75:5079.

“Wilkinson Microwave Anisotropy Probe: First-Year Results from WMAP,” C.L. Bennett, M. Halpern, G. Hinshaw, N. Jarosik, A. Kogut, M. Limon, S.S. Meyer, L. Page, D.N. Spergel, G.S. Tucker, E. Wollack, E.L. Wright, C. Barnes, M.R. Greason, R.S. Hill, E. Komatsu, M.R. Nolta, N. Odegard, H.V. Peiris, L. Verde, J.L. Weiland, 2003, ApJ Suppl. Series, Special Reprint, 148:1—436.

“Characteristics of Broad-Band InP Millimeter-Wave Amplifiers for Radiometry,” Wollack, E.J. and Pospieszalski, M.W., 1998, IEEE MTT-S, Vol. 2, pp. 669—672.

“Galactic Microwave Emission at Degree Angular Scales,” A. de Oliveira-Costa, A. Kogut, M.J. Devlin, C.B. Netterfield, L.A. Page, E.J. Wollack, 1997, ApJ, 482: L17—L20.

“An Instrument for Investigation of the Cosmic Microwave Background Radiation at Intermediate Angular Scales,” E.J. Wollack, M.J. Devlin, N. Jarosik, N., C.B. Netterfield, L. Page, D. Wilkinson, 1997, ApJ, 476: 440—457.

“A Measurement of the Angular Power Spectrum of the Anisotropy in the Cosmic Microwave Background,” C.B. Netterfield, M.J. Devlin, N. Jarosik, L. Page, E.J. Wollack, 1997, ApJ, 474: 47—66.

“An Absolute Measurement of the Cosmic Background Radiation Temperature at 20 Centimeters,” S.T. Staggs, N.C. Jarosik, D. Wilkinson, E.J. Wollack, 1996, ApJ, 458: 407—418.

“High-Electron-Mobility-Transistor Gain Stability and its Design Implications for Wide Band Millimeter Wave Receivers,” E.J. Wollack, 1995, Rev. Sci. Instrum., 66(8): 4305—4312.

“A Measurement of the Anisotropy in the Cosmic Microwave Background Radiation at Degree Angular Scales,” E.J. Wollack, N.C. Jarosik, C.B. Netterfield, L.A. Page, D. Wilkinson, 1993, ApJ, 419: L49—L5.