5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of OsloNO150 papers
- Bay Area Environmental Research InstituteUS127 papers
- Goddard Space Flight CenterUS95 papers
- NASA Research ParkUS82 papers
- NSF NCAR High Altitude ObservatoryUS82 papers
- NSF National Center for Atmospheric ResearchUS70 papers
- National Astronomical Observatory of JapanJP65 papers
- Center for Astrophysics Harvard & SmithsonianUS61 papers
- Stanford UniversityUS61 papers
- Centre National de la Recherche ScientifiqueFR59 papers
- Max Planck Institute for Solar System ResearchDE56 papers
- Marshall Space Flight CenterUS44 papers
19 papers · 1 filter
On mathematical theory of selection: Continuous time population dynamics
Georgy P. Karev
Mathematical theory of selection is developed within the frameworks of general models of inhomogeneous populations with continuous time. Methods that allow us to study the distribu…
Driving major solar flares and eruptions: a review
C. J. Schrijver
This review focuses on the processes that energize and trigger major solar flares and flux-rope destabilizations. Numerical modeling of specific solar regions is hampered by uncert…
Solar surface emerging flux regions: a comparative study of radiative MHD modeling and Hinode SOT observations
M. C. M. Cheung, M. Schuessler, T. D. Tarbell +1
We present results from numerical modeling of emerging flux regions on the solar surface. The modeling was carried out by means of 3D radiative MHD simulations of the rise of buoya…
Chromospheric Anemone Jets as Evidence of Ubiquitous Reconnection
Kazunari Shibata, Tahei Nakamura, Takuma Matsumoto +19
The heating of the solar chromosphere and corona is a long-standing puzzle in solar physics. Hinode observations show the ubiquitous presence of chromospheric anemone jets outside…
A Coherence-Based Approach for Tracking Waves in the Solar Corona
Scott W. McIntosh, Bart De Pontieu, Steven Tomczyk
We consider the problem of automatically (and robustly) isolating and extracting information about waves and oscillations observed in EUV image sequences of the solar corona with a…
Magnetic Landscape of Sun's Polar Region
S. Tsuneta, K. Ichimoto, Y. Katsukawa +11
We present the magnetic landscape of the polar region of the Sun that is unprecedented in terms of high spatial resolution, large field of view, and polarimetric precision. These o…
Disintegration of Magnetic Flux in Decaying Sunspots as Observed with the Hinode SOT
M. Kubo, B. W. Lites, K. Ichimoto +8
Continuous observations of sunspot penumbrae with the Solar Optical Telescope aboard \textit{Hinode} clearly show that the outer boundary of the penumbra fluctuates around its aver…
Hinode Observations of Magnetic Elements in Internetwork Areas
A. G. de Wijn, B. W. Lites, T. E. Berger +3
We use sequences of images and magnetograms from Hinode to study magnetic elements in internetwork parts of the quiet solar photosphere. Visual inspection shows the existence of ma…
Energy flux of Alfven waves in weakly ionized plasma
J. Vranjes, S. Poedts, B. P. Pandey +1
The overshooting convective motions in the solar photosphere are frequently proposed as the source for the excitation of Alfvén waves. However, the photosphere is a) very weakly io…
Characteristics of Anemone Active Regions Appearing in Coronal Holes Observed with {\it Yohkoh} Soft X-ray Telescope
Ayumi Asai, Kazunari Shibata, Hirohisa Hara +1
Coronal structure of active regions appearing in coronal holes is studied by using the data obtained with the Soft X-Ray Telescope (SXT) aboard {\it Yohkoh} from 1991 November to 1…
STEREO/SECCHI Stereoscopic Observations Constraining the Initiation of Polar Coronal Jets
S. Patsourakos, E. Pariat, A. Vourlidas +2
We report on the first stereoscopic observations of polar coronal jets made by the EUVI/SECCHI imagers on board the twin STEREO spacecraft. The significantly separated viewpoints (…
Numerical simulations of rotating axisymmetric sunspots
G. J. J. Botha, F. H. Busse, N. E. Hurlburt +1
A numerical model of axisymmetric convection in the presence of a vertical magnetic flux bundle and rotation about the axis is presented. The model contains a compressible plasma d…
Search for high velocities in the disk counterpart of type II spicules
Ø. Langangen, B. De Pontieu, M. Carlsson +3
Recently, De Pontieu et al. (2007b) discovered a class of spicules that evolves more rapidly than previously known spicules, with rapid apparent motions of 50--150 km s, t…
Frequent Occurrence of High-speed Local Mass Downflows on the Solar Surface
T. Shimizu, B. W. Lites, Y. Katsukawa +7
We report on new spectro-polarimetric measurements with simultaneous filter imaging observation, revealing the frequent appearance of polarization signals indicating high-speed, pr…
Can We Improve the Preprocessing of Photospheric Vector Magnetograms by the Inclusion of Chromospheric Observations?
T. Wiegelmann, J. K. Thalmann, C. J. Schrijver +2
The solar magnetic field is key to understanding the physical processes in the solar atmosphere. Nonlinear force-free codes have been shown to be useful in extrapolating the corona…
Transient horizontal magnetic fields in solar plage regions
R. Ishikawa, S. Tsuneta, K. Ichimoto +9
We report the discovery of isolated, small-scale emerging magnetic fields in a plage region with the Solar Optical Telescope aboard Hinode. Spectro-polarimetric observations were c…
First Stereoscopic Coronal Loop Reconstructions from Stereo Secchi Images
L. Feng, B. Inhester, S. K. Solanki +4
We present the first reconstruction of the three-dimensional shape of magnetic loops in an active region from two different vantage points based on simultaneously recorded images.…
Emergence of a Helical Flux Rope Under an Active Region Prominence
Takenori J. Okamoto, Saku Tsuneta, Bruce W. Lites +12
Continuous observations were obtained of active region 10953 with the Solar Optical Telescope (SOT) on board the \emph{Hinode} satellite during 2007 April 28 to May 9. A prominence…
Reappraising Transition Region Line Widths in light of Recent Alfvén Wave Discoveries
Scott W. McIntosh, Bart De Pontieu, Theodore D. Tarbell
We provide a new interpretation of ultraviolet transition region emission line widths observed by the SUMER instrument on the Solar and Heliospheric Observatory (SOHO). This invest…