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Magnetic Field Strength in the Upper Solar Corona Using White-light Shock Structures Surrounding Coronal Mass Ejections
Cho, K. -S.; Moon, Y. -J.; Gopalswamy, N. +2 more
To measure the magnetic field strength in the solar corona, we examined 10 fast (>=1000 km s-1) limb coronal mass ejections(CMEs) that show clear shock structures in Solar and Heliospheric Observatory/Large Angle and Spectrometric Coronagraph images. By applying the piston-shock relationship to the observed CME's standoff distance an…
Fermi-LAT Observations and a Broadband Study of Supernova Remnant CTB 109
Slane, Patrick; Castro, Daniel; Ellison, Donald C. +1 more
CTB 109 (G109.1-1.0) is a Galactic supernova remnant (SNR) with a hemispherical shell morphology in X-rays and in the radio band. In this work, we report the detection of γ-ray emission coincident with CTB 109, using 37 months of data from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. We study the broadband characteristics…
Survival of flux transfer event (FTE) flux ropes far along the tail magnetopause
Eastwood, J. P.; Fear, R. C.; Phan, T. D. +4 more
During intervals of southward IMF, magnetic reconnection can result in the formation of flux transfer events (FTEs) on the dayside magnetopause which travel along the magnetopause in the anti-sunward direction. Of particular interest is their fate and the role they play transporting solar wind plasma into the magnetosphere. We present the discover…
Nonstorm time scattering of ring current protons by electromagnetic ion cyclotron waves
Xiao, Fuliang; Yang, Chang; Zhou, Qinghua +4 more
We report correlated observation of enhanced electromagnetic ion cyclotron (EMIC) waves and dynamic evolution of ring current proton flux collected by Cluster satellite near the location L = 4.5 during March 26-27, 2003, a nonstorm period (Dst> -10). Energetic (5-30 keV) proton fluxes are found to drop rapidly (e.g., a half hour) at …
The radio-X-ray relation as a star formation indicator: results from the Very Large Array-Extended Chandra Deep Field-South
Brandt, W. N.; Tozzi, P.; Xue, Y. Q. +10 more
In order to trace the instantaneous star formation rate (SFR) at high redshift, and thus help in understanding the relation between the different emission mechanisms related to star formation, we combine the recent 4-Ms Chandra X-ray data and the deep Very Large Array radio data in the Extended Chandra Deep Field-South region. We find 268 sources …
The interplanetary magnetic structure that guides solar relativistic particles
Klein, K. -L.; Démoulin, P.; Dasso, S. +1 more
Context. Relating in-situ measurements of relativistic solar particles to their parent activity in the corona requires understanding the magnetic structures that guide them from their acceleration site to the Earth. Relativistic particle events are observed at times of high solar activity, when transient magnetic structures such as interplanetary …
Enhanced atmospheric oxygen outflow on Earth and Mars driven by a corotating interaction region
Barabash, S.; Lundin, R.; Woch, J. +10 more
Solar wind controls nonthermal escape of planetary atmospheric volatiles, regardless of the strength of planetary magnetic fields. For both Earth with a strong dipole and Mars with weak remnant fields, the oxygen ion (O+) outflow has been separately found to be enhanced during corotating interaction region (CIR) passage. Here we compare…
Kinetic simulations of finite gyroradius effects in the lunar plasma environment on global, meso, and microscales
Barabash, Stas; Jarvinen, Riku; Kallio, Esa +12 more
The recent in situ particle measurements near the Moon by Chandrayaan-1 and Kaguya missions as well as the earlier observation by the Lunar Prospector have shown that the Moon-solar wind interaction is more complicated than believed earlier. The new observations have arisen the need for a detailed modelling of the near surface plasma-surface proce…
AKARI Infrared Camera Survey of the Large Magellanic Cloud. I. Point-source Catalog
Onaka, Takashi; Tanabé, Toshihiko; Ita, Yoshifusa +10 more
We present a near- to mid-infrared point-source catalog of five photometric bands at 3.2, 7, 11, 15, and 24 µm for a 10 deg2 area of the Large Magellanic Cloud (LMC) obtained with the Infrared Camera on board the AKARI satellite. To cover the survey area the observations were carried out at three separate seasons from 2006 May to …
Central kinematics of the globular cluster NGC 2808: upper limit on the mass of an intermediate-mass black hole
Kissler-Patig, M.; de Zeeuw, P. T.; Neumayer, N. +5 more
Context. Globular clusters are an excellent laboratory for stellar population and dynamical research. Recent studies have shown that these stellar systems are not as simple as previously assumed. With multiple stellar populations as well as outer rotation and mass segregation they turn out to exhibit high complexity. This includes intermediate-mas…