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Diagnostics of Coronal Bright Points using IRIS, AIA, and HMI Observations
Dwivedi, B. N.; Kayshap, P.
We perform the detailed imaging and spectroscopic analysis of two coronal bright points (CBPs). These CBPs are dominated by bright dots or elongated bright features. Their rapid temporal variations lead to a continuous change in their overall morphology at chromospheric and transition-region (TR) temperatures. A 3D potential magnetic field extrapo…
High Radiation Pressure on Interstellar Dust Computed by Light-scattering Simulation on Fluffy Agglomerates of Magnesium-silicate Grains with Metallic-iron Inclusions
Kimura, Hiroshi
Recent space missions have provided information on the physical and chemical properties of interstellar grains such as the ratio β of radiation pressure to gravity acting on the grains in addition to the composition, structure, and size distribution of the grains. Numerical simulation on the trajectories of interstellar grains captured by Stardust…
Oxygen Ions O+ Energized by Kinetic Alfvén Eigenmode During Dipolarizations of Intense Substorms
Dandouras, I.; André, M.; Reme, H. +7 more
Singly charged oxygen ions, O+, energized by kinetic Alfvén wave eigenmode (KAWE) in the plasma sheet boundary layer during dipolarizations of two intense substorms, 10:07 UT on 31 August 2004 and 18:24 UT on 14 September 2004, are investigated by Cluster spacecraft in the magnetotail. It is found that after the beginning of the expansi…
Pseudo-automatic Determination of Coronal Mass Ejections’ Kinematics in 3D
Stenborg, Guillermo; Dal Lago, Alisson; Echer, Ezequiel +2 more
Coronal mass ejection (CME) events are among the main drivers of geomagnetic disturbances, and hence play a central role in the Sun-Earth system. Their monitoring and, in particular, the determination of their speed and direction of propagation are key issues for the forecasting of space weather near to Earth. We have implemented a method to track…
Dynamical history of a binary cluster: Abell 3653
Hudaverdi, Murat; Caglar, Turgay
We study the dynamical structure of a bimodal galaxy cluster Abell 3653 at z = 0.1089 using optical and X-ray data. Observations include archival data from the Anglo-Australian Telescope, X-ray observatories XMM-Newton and Chandra. We draw a global picture for A3653 using galaxy density, X-ray luminosity and temperature maps. The galaxy distributi…
Beaming of intense AKR seen from the Interball-2 spacecraft
Panchenko, M.; Mutel, R.; Christopher, I. +2 more
We present results of intense auroral kilometric radiation (AKR) sources direction finding based on single-spacecraft k→ vector source location performed in the frame of Interball-2 mission (POLRAD experiment on board Auroral Probe). With our swept frequency analyzer we are not able to work with single AKR bursts generated in small, elementary sou…
Measuring Velocities in the Early Stage of an Eruption: Using “Overlappogram” Data from Hinode EIS
Warren, Harry; Harra, Louise K.; Doschek, George A. +4 more
In order to understand the onset phase of a solar eruption, plasma parameter measurements in the early phases are key to constraining models. There are two current instrument types that allow us to make such measurements: narrow-band imagers and spectrometers. In the former case, even narrow-band filters contain multiple emission lines, creating s…
Aerosols optical properties in Titan's detached haze layer before the equinox
West, Robert A.; Seignovert, Benoît; Lavvas, Panayotis +2 more
UV observations with Cassini ISS Narrow Angle Camera of Titan's detached haze is an excellent tool to probe its aerosols content without being affected by the gas or the multiple scattering. Unfortunately, its low extent in altitude requires a high resolution calibration and limits the number of images available in the Cassini dataset. However, we…
The interplanetary magnetic field observed by Juno enroute to Jupiter
Connerney, John E. P.; Gruesbeck, Jacob R.; Gershman, Daniel J. +1 more
The Juno spacecraft was launched on 5 August 2011 and spent nearly 5 years traveling through the inner heliosphere on its way to Jupiter. The Magnetic Field Investigation was powered on shortly after launch and obtained vector measurements of the interplanetary magnetic field (IMF) at sample rates from 1 to 64 samples/second. The evolution of the …
Short time-scale variables in the Gaia era: detection and characterization by structure function analysis
Wevers, Thomas; Rimoldini, Lorenzo; Mowlavi, Nami +7 more
We investigate the capabilities of the ESA Gaia mission for detecting and characterizing short time-scale variability, from tens of seconds to a dozen hours. We assess the efficiency of the variogram analysis, for both detecting short time-scale variability and estimating the underlying characteristic time-scales from Gaia photometry, through exte…