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- Publications
- Influence
Is the solar chromospheric magnetic field force-free?
- T. Metcalf, L. Jiao, A. Mcclymont, R. Canfield, H. Uitenbroek
- Physics
- 1995
The Relationship Between X-Ray Radiance and Magnetic Flux
- A. Pevtsov, G. Fisher, +4 authors T. Metcalf
- Physics
- 1 December 2003
We use soft X-ray and magnetic field observations of the Sun (quiet Sun, X-ray bright points, active regions, and integrated solar disk) and active stars (dwarf and pre-main-sequence) to study the… Expand
Latitudinal variation of helicity of photospheric magnetic fields
- A. Pevtsov, R. Canfield, T. Metcalf
- Physics
- 20 February 1995
Using a 1988-1994 data set of original photospheric vector magnetograms as well as published data, we have studied the average magnetic helicity of 69 diverse active regions, adopting the linear… Expand
NONLINEAR FORCE-FREE FIELD MODELING OF A SOLAR ACTIVE REGION AROUND THE TIME OF A MAJOR FLARE AND CORONAL MASS EJECTION
- C. Schrijver, M. Derosa, +14 authors J. Thalmann
- Physics
- 30 November 2007
Solar flares and coronal mass ejections are associated with rapid changes in field connectivity and are powered by the partial dissipation of electrical currents in the solar atmosphere. A critical… Expand
Nonlinear Force-Free Modeling of Coronal Magnetic Fields Part I: A Quantitative Comparison of Methods
- C. Schrijver, M. Derosa, +6 authors T. Wiegelmann
- Physics
- 1 May 2006
We compare six algorithms for the computation of nonlinear force-free (NLFF) magnetic fields (including optimization, magnetofrictional, Grad–Rubin based, and Green's function-based methods) by… Expand
Coronal Heating in Active Regions as a Function of Global Magnetic Variables
- G. Fisher, D. Longcope, D. Longcope, T. Metcalf, A. Pevtsov
- Physics
- 1 December 1998
A comparison of X-ray images of the Sun and full disk magnetograms shows a correlation between the locations of the brightest X-ray emission and the locations of bipolar magnetic active regions. This… Expand
Nonlinear Force-Free Modeling of Coronal Magnetic Fields. II. Modeling a Filament Arcade and Simulated Chromospheric and Photospheric Vector Fields
- T. Metcalf, M. Derosa, +6 authors James M. McTtiernan
- Physics
- 1 February 2008
We compare a variety of nonlinear force-free field (NLFFF) extrapolation algorithms, including optimization, magneto-frictional, and Grad – Rubin-like codes, applied to a solar-like reference model.… Expand
A TRACE White Light and RHESSI Hard X-Ray Study of Flare Energetics
- L. Fletcher, I. Hannah, H. Hudson, T. Metcalf
- Physics
- 20 February 2007
In this paper we investigate the formation of the white-light (WL) continuum during solar flares and its relationship to energy deposition by electron beams inferred from hard X-ray emission. We… Expand
A Concise History of Modern India
- B. Metcalf, T. Metcalf
- History
- 26 November 2001
List of illustrations Preface to the second edition Preface to the first edition Glossary Chronology 1. Sultans, Mughals and pre-colonial Indian society 2. Mughal twilight: the emergence of regional… Expand
Energy partition in two solar flare/CME events
- A. Emslie, H. Kucharek, +12 authors T. Zurbuchen
- Physics
- 1 October 2004
Using coordinated observations from instruments on the Advanced Composition Explorer (ACE), the Solar and Heliospheric Observatory (SOHO), and the Ramaty High Energy Solar Spectroscopic Imager… Expand
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