The relationship between chromospheric emissions and magnetic field strength (2009)
Loukitcheva, Maria A., Solanki, Sami K., White, Stephen M.
Aims. We analyze observational data from 4 instruments to study the correlations between chromospheric emission, spanning the heights from the temperature minimum region to the middle chromosphere,...
Dynamically Driven Evolution of the Interstellar Medium in M51 (2009)
Koda, Jin, Scoville, Nick, Sawada, Tsuyoshi, La Vigne, Misty A., Voguel, Stuart N., Potts, Ashley E., ...
Massive star formation occurs in giant molecular clouds (GMCs); an understanding of the evolution of GMCs is a prerequisite to develop theories of star formation and galaxy evolution. We report the...
A Smoking Gun in the Carina Nebula (2009)
Hamaguchi, Kenji, Corcoran, Michael F., Ezoe, Yuichiro, Townsley, Leisa, Broos, Patrick, Gruendl, Robert, ...
The Carina Nebula is one of the youngest, most active sites of massive star formation in our Galaxy. In this nebula, we have discovered a bright X-ray source that has persisted for ~30 years. The...
A Resolved Ring of Debris Dust around the Solar Analog HD 107146 (2009)
Corder, Stuartt, Carpenter, John M., Sargent, Anneila I., Zauderer, B. Ashley, Wright, Melvyn C. H., White, Stephen M., ...
We present resolved images of the dust continuum emission from the debris disk around the young (80-200 Myr) solar-type star HD 107146 with CARMA at λ = 1.3 mm and the CSO at λ = 350 μ. Both...
Solar Radio Bursts and Space Weather (2008)
Abstract. Space Weather is the study of the conditions in the solar wind that can affect life on the surface of the Earth, particularly the increasingly technologically sophisticated devices that are...
ABSTRACT RADIO MEASUREMENTS OF CORONAL MAGNETIC FIELDS (2008)
The measurement of magnetic field strengths in the solar corona using radio observations is reviewed. This is a well established technique that exploits the fact that the electron gyrofrequency for...
Chapter 5 CORONAL MAGNETIC FIELD MEASUREMENTS THROUGH GYRORESONANCE EMISSION (2008)
Abstract This article reviews the use of gyroresonance emission at radio wavelengths to measure coronal magnetic fields. The spiralling motion of electrons in the 200– 2000 G fields in the solar...
Stephen M. White, Robert P. Lin, Dale E. Gary, James M. Mctiernan, Hugh S. Hudson, ...
Observations of a solar flare which occurred at 2022 UT on 1992 January 7, during the December 91/January 92 Max'91 Campaign, are presented here. This flare was observed simultaneously in Hff,...
Millimeter Interferometer Observations of Flares (2007)
This paper addresses the current state of millimeter interferometry of solar flares and the issues which can be addressed by such observations. Millimeter interferometers such as BIMA detect...
Jeffrey W. Brosius, Joseph M. Davila, J. Thomas, Stephen M. White
We observed NOAA region 7563 simultaneously with Goddard Space Flight Centers Solar EUV Rocket Telescope and Spectrogaph (SERTS) and with the Very Large Array (VLA) on 1993 August 17. SERTS obtained...
SIGNATURES OF CORONAL CURRENTS IN MICROWAVE IMAGES (2007)
Jeongwoo Lee, Stephen M. White, N. Gopalswamy, M. R. Kundu
Abstract. Microwave emission from solar active regions at frequencies above 4 GHz is dominated by gyroresonance opacity in strong coronal magnetic fields, which allows us to use radio observations to...
Coronal Currents, Magnetic Fields and Heating in a Solar Active Region (2007)
Jeongwoo Lee, A. N. Mcclymont, Stephen M. White, M. R. Kundu
Abstract. We compare microwave images of a solar active region with state-of-the-art fullynonlinear force-free extrapolations of the photospheric fields in order to study the link between coronal...
Abstract. This review discusses methods for determining solar coronal magnetic fields, with an emphasis on radio measurements of field strengths in solar active regions. 1.
FIRST IMAGES OF IMPULSIVE MILLIMETER EMISSION AND SPECTRAL ANALYSIS OF THE (2007)
Dale E. Gary, Stephen M. White, Robert P. Lin, Imke De Pater
Abstract. We present here the first images of impulsive millimeter emission of a flare. The flare on 1994 August 18 was simultaneously observed at millimeter (86 GHz), microwave (1-18 GHz), and soft...
A Test for Coronal Magnetic Field Extrapolations (2007)
Jeongwoo Lee, Stephen M. White, Mukul R. Kundu, A. N. Mcclymont
As models for the physical properties of the corona above solar active regions grow more sophisticated, we will require better means for testing them. In this paper we discuss and apply such a test...
Stephen M. White, Robert P. Lin, Imke De Pater, K. Shibasaki, Hugh S. Hudson, ...
We present the first high spatial resolution images of a solar flare at millimeter wavelengths. On 1994 August 17, a GOES soft X-ray class M1 flare was observed by the Berkeley-Illinois-Maryland...
MICROWAVE MODE COUPLING ABOVE ACTIVE REGIONS AS A CORONAL DENSITY DIAGNOSTIC (2007)
Jeongwoo Lee, Stephen M. White, M. R. Kundu, A. N. Mcclymont
Abstract. It is well recognized that the phenomenon of depolarization (the conversion of polarized radio emission into unpolarized emission) of microwaves over solar active regions can be used to...
Millimeter Continuum Observations of Stars (2007)
Roberto Pallavicini, Stephen M. White
Abstract. We review the scientific advances to be expected from millimeter continuum observations of stars by a Large Southern Array (LSA). We discuss briefly several topics including millimeter...
R. P. Lin, Imke De Pater, Stephen M. White, K. Shibasaki, H. Nakajima
Abstract. We present a comprehensive analysis of the 1994 August 17 flare, the first flare imaged at millimeter (86 GHz) wavelengths. The temporal evolution of this flare displays a prominent...
Spatial Distribution And Temporal Evolution Of (2007)
Coronal Bright Points, Jie Zhang, Mukul R. Kundu, Stephen M. White
We present a statistical study of the spatial distribution and temporal evolution of coronal bright points (BPs) by analyzing a continuous set of observations of a quiet-Sun region of size 780 ## 780...
Solar radioastronomy with the LOFAR (LOw Frequency ARray) (2007)
Radio Telescope Stephen, Stephen M. White, Namir E. Kassim, William C. Erickson
The Low Frequency Array (LOFAR) will be a radio astronomy interferometric array operating in the approximate frequency range 10-240 MHz. It will have a large collecting area achieved using active...
Stellar Coronae in the Chandra and XMM-Newton Era (2007)
Asp Conference Series, F. Favata, J. Drake, Stephen M. White
We briefly review the status of radio observations of the solar atmosphere with an emphasis on relevance to stellar observations.
The imaging capabilities of the Frequency Agile Solar (2007)
Radiotelescope Stephen White, Stephen M. White, Jeongwoo Lee, Markus J. Aschw, Timothy S. Bastian
The Frequency Agile Solar Radiotelescope (FASR) will observe the Sun over a wide range of radio frequencies and make high spatial resolution images at many frequencies nearly simultaneously. FASR...
Jeffrey W. Brosius, Stephen M. White
We measure coronal magnetic field strengths of 1750 G at a height of 8000 km above a large sunspot in NOAA AR 10652 at the west solar limb on 2004 July 29 using coordinated observations with the Very...
Stephen M. White, Roger J. Thomas, Richard A. Schwartz
Abstract. We investigate the conversion of the 0.5–4 and 1–8 ˚A soft X–ray flux measurements made by detectors on the Geostationary Operational Environmental Satellites (GOES) into temperature...
Linhui Sui, Gordon D. Holman, Stephen M. White, Jie Zhang
We carried out a multiwavelength analysis of the solar limb flare on 2002 April 15. The observations all indicate that the flare occurred in an active region with an asymmetric dipole magnetic...
Ayumi Asai, Hiroshi Nakajima, Masumi Shimojo, Stephen M. White, Hugh S. Hudson, R. P. Lin
We present a detailed examination on the nonthermal emissions during the preflare phase of the X4.8 flare that occurred on 2002 July 23. The microwave (17 GHz and 34 GHz) data obtained with Nobeyama...
Jeffrey W. Brosius, Stephen M. White
We obtained coordinated observations of the large sunspot in NOAA Region 8539 on 1999 May 9 and 13 with the Very Large Array and three instruments (CDS, EIT, MDI) aboard the Solar and Heliospheric...
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Thesis (M.A.)--San Diego State University, 1995.
Thesis (Ph. D.)--University of Idaho, 1984.
Thesis (M.S.)--University of Idaho, 1981.