Search Publications
Missions
Journals
Publication Years
Hall magnetohydrodynamic effects for three-dimensional magnetic reconnection with finite width along the direction of the current
Nakamura, R.; Kubota, Y.; Nakamura, T. K. M. +2 more
We performed three-dimensional Hall magnetohydrodynamic (MHD) simulations of magnetic reconnection with finite width along the direction perpendicular to the antiparallel magnetic field (i.e., the direction of the electric current). Previous similar simulations including the Hall term have shown that the localized reconnection region itself can br…
New Solar Wind Diagnostic Using Both in Situ and Spectroscopic Measurements
Lepri, S. T.; Zurbuchen, T. H.; Landi, E. +1 more
We develop a new diagnostic technique that utilizes, at the same time, two completely different types of observations—in situ determinations of solar wind charge states and high-resolution spectroscopy of the inner solar corona—in order to study the temperature, density, and velocity of the solar wind as a function of height in the inner corona be…
Geological map and stratigraphy of asteroid 21 Lutetia
Massironi, Matteo; Pajola, Maurizio; Tubiana, Cecilia +15 more
The OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) images acquired during the recent Rosetta fly-by of Lutetia (10th of July 2010), enabled us to unravel the long geological history of the asteroid. This is recorded on its highly varied surface which displays geological units of disparate ages. In particular, using images of t…
A Statistical Study on the Morphology of Rays and Dynamics of Blobs in the Wake of Coronal Mass Ejections
Feng, S. W.; Chen, Y.; Li, B. +4 more
In this paper, with a survey through the Large Angle and Spectrometric Coronagraph (LASCO) data from 1996 to 2009, we present 11 events with plasma blobs flowing outwards sequentially along a bright coronal ray in the wake of a coronal mass ejection. The ray is believed to be associated with the current-sheet structure that formed as a result of s…
Adiabatic electron heating in the magnetotail current sheet: Cluster observations and analytical models
Petrukovich, A. A.; Zelenyi, L. M.; Nakamura, R. +1 more
We consider the electron distribution in current sheets observed by Cluster mission in the Earth magnetotail. We use the statistics of 70 fast (less than 20 minutes) and 12 slow (more than one hour) crossings of horizontal current sheets. We demonstrate that for both types electron temperature decreases with increase of magnetic field ∣Bx
Local Helioseismology of Sunspots: Current Status and Perspectives
Kosovichev, Alexander G.
Mechanisms of the formation and stability of sunspots are among the longest-standing and intriguing puzzles of solar physics and astrophysics. Sunspots are controlled by subsurface dynamics, hidden from direct observations. Recently, substantial progress in our understanding of the physics of the turbulent magnetized plasma in strong-field regions…
Constraints on cosmic-ray efficiency in the supernova remnant RCW 86 using multi-wavelength observations
Giordano, F.; Lemoine-Goumard, M.; Uchiyama, Y. +4 more
Context. Several young supernova remnants (SNRs) have recently been detected in the high-energy (HE; 0.1 < E < 100 GeV) and very-high-energy (VHE; E > 100 GeV) gamma-ray domains. As exemplified by RX J1713.7-3946, the nature of this emission has been hotly debated, and direct evidence for the efficient acceleration of cosmic-ray protons a…
A noon-to-midnight electric field and nightside dynamics in Saturn's inner magnetosphere, using microsignature observations
Krupp, N.; Dougherty, M. K.; Roussos, E. +5 more
We have created a new, updated catalog of energetic electron microsignature events caused by the moons Tethys and Dione. We used electron data of the MIMI-LEMMS detector that is onboard the Cassini spacecraft, in the energy range 20-300 keV and for the period from July 2004 to January 2011. The present study looks at how the location of a moon's w…
Temporal and Spectral Evolution in X- and γ-Rays of Magnetar 1E 1547.0-5408 since its 2008 October Outburst: The Discovery of a Transient Hard Pulsed Component after its 2009 January Outburst
Kuiper, L.; Hermsen, W.; den Hartog, P. R. +1 more
The magnetar 1E 1547.0-5408 exhibited outbursts in 2008 October and 2009 January. In this paper, we present in great detail the evolution of the temporal and spectral characteristics of the persistent total and pulsed emission of 1E 1547.0-5408 between ~1 and 300 keV starting on 2008 October 3 and ending in 2011 January. We analyzed data collected…
X-Ray Observations of the Young Pulsar J1357—6429 and Its Pulsar Wind Nebula
Pavlov, George G.; Kargaltsev, Oleg; Chang, Chulhoon +1 more
We observed the young pulsar J1357—6429 with the Chandra and XMM-Newton observatories. The pulsar spectrum fits well a combination of an absorbed power-law model (Γ = 1.7 ± 0.6) and a blackbody model (kT = 140+60 - 40 eV, R ~ 2 km at the distance of 2.5 kpc). Strong pulsations with pulsed fraction of 42% ± 5%, apparently asso…