Concepedia
Statistics
Publications
12
Citations
506
H-Index
Active since
1994
Affiliations
National Solar Observatory(Current)
U.S. National Science Foundation
Association of Universities for Research in Astronomy
California State University, Northridge
M. J. Penn is an author at National Solar Observatory specializing in astrophysics, engineering, and solar activity.
Top concepts
EngineeringAstrophysicsSolar ActivitySolar VariabilitySunspot StudiesNatural SciencesPhysicsPhotometrySolar ConvectionMagnetohydrodynamics
Publications per year
1994–2019
Temporal Changes in Sunspot Umbral Magnetic Fields and Temperatures
M. J. Penn, W. Livingston · The Astrophysical Journal · 2006 · 104 citations · Full text
High-resolution Intensity Spectra, Solar Variability, Engineering +14
He<scp>i</scp>10830 A Line Polarimetry: A New Tool to Probe the Filament Magnetic Fields
H. Lin, M. J. Penn, J. R. Kuhn · The Astrophysical Journal · 1998 · 79 citations · Full text
Large-scale Structures and their Role in Solar Activity
K. Sankarasubramanian, M. J. Penn, Alexei Pevtsov · ASPC · 2005 · 68 citations
Solar Physic, Solar Activity, Solar Variability +1
Imaging spectropolarimetry of the He I 1083 nanometer line in a flaring solar active region
M. J. Penn, J. R. Kuhn · The Astrophysical Journal · 1995 · 63 citations
Removing instrumental polarization from infrared solar polarimetric observations
J. R. Kuhn, Krishnan Balasubramaniam, Greg Kopp et al. · Solar Physics · 1994 · 36 citations
Natural Sciences, Spectroscopy, Instrumental Polarization +2
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