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Analyzing the propagation of EUV waves and their connection with type II radio bursts by combining numerical simulations and multi-instrument observations
Dolla, L.; Downs, C.; Marqué, C. +1 more
Context. EUV (EIT) waves are wavelike disturbances of enhanced extreme ultraviolet (EUV) emission that propagate away from an eruptive active region across the solar disk. Recent years have seen much debate over their nature, with three main interpretations: the fast-mode magneto-hydrodynamic (MHD) wave, the apparent wave (reconfiguration of the m…
Recurrent Solar Energetic Particle Flux Enhancements Observed near Earth and Mars
Bhardwaj, Anil; Lee, Christina O.; Thampi, Smitha V. +3 more
The period 2016 August 1 to November 15 was characterized by the presence of corotating interaction regions (CIRs) and a few weak coronal mass ejections (CMEs) in the heliosphere. In this study we show recurrent energetic electron and proton enhancements observed near Earth (1 au) and Mars (1.43-1.38 au) during this period. The observations near E…
The Coronal Mass Ejection Visibility Function of Modern Coronagraphs
St. Cyr, O. C.; Vourlidas, Angelos; Xie, H. +1 more
We analyze the detection capability of coronal mass ejections (CMEs) for all currently operating coronagraphs in space. We define as CMEs events that propagate beyond 10 solar radii with morphologies broadly consistent with a magnetic flux-rope presence. We take advantage of multi-viewpoint observations over five month-long intervals, correspondin…
Kinematic distinction of the two subpopulations of X-ray pulsars
Prišegen, M.
Context. The population of Be/X-ray binaries shows strong evidence of bimodality, especially in the spin period of neutron stars. Several physical mechanisms may produce this bimodality. The most favored candidate mechanisms are two distinct supernova channels or different accretion modes of the neutron stars in Be/X-ray binaries. Investigating th…
First detection of X-ray line emission from Type IIn supernova 1978K with XMM-Newton's RGS
Katsuda, Satoru; Takahashi, Koh; Yoshida, Takashi +2 more
We report on robust measurements of elemental abundances of the Type IIn supernova SN 1978K, based on the high-resolution X-ray spectrum obtained with the Reflection Grating Spectrometer (RGS) onboard XMM-Newton. The RGS clearly resolves a number of emission lines, including N Ly $\alpha$ , O Ly $\alpha$ , O Ly $\beta$ , Fe xvii, Fe xviii, Ne He $…
Pattern recognition in time series for space missions: A rosetta magnetic field case study
Glassmeier, K. -H.; Richter, I.; Ostaszewski, K. +4 more
Time series analysis is a technique widely employed in space science. In unpredictable environments like space, scientific analysis relies on large data sets to enable interpretation of observations. Artificial signal interferences caused by the spacecraft itself further impede this process. The most time consuming part of these studies is the eff…
Tests of AGN Feedback Kernels in Simulated Galaxy Clusters
Voit, G. Mark; Glines, Forrest W.; O'Shea, Brian W.
In cool-core galaxy clusters with central cooling times much shorter than a Hubble time, condensation of the ambient central gas is regulated by a heating mechanism, probably an active galactic nucleus. Previous analytical work has suggested that certain radial distributions of heat input may result in convergence to a quasi-steady global state th…
Saturn's south polar cloud composition and structure inferred from 2006 Cassini/VIMS spectra and ISS images
Baines, K. H.; Sromovsky, L. A.; Fry, P. M.
We used 0.85-5.1 µm 2006 observations by Cassini's Visual and Infrared Mapping Spectrometer (VIMS) to constrain the unusual vertical structure and compositions of cloud layers in Saturn's south polar region, the site of a powerful vortex circulation, shadow-casting cloud bands, and evidence for ammonia ice clouds without lightning. Finding a…
Survey of 1-Hz waves in the near-Venusian space: Venus Express observations
Zhang, T. L.; Chen, Y. Q.; Wang, G. Q. +2 more
With 32 Hz magnetic field data of Venus Express from May 2006 to August 2012, the global spatial distributions of 1-Hz waves in the near-Venusian space are presented in this paper. The occurrence rate of 1-Hz waves is maximized near the Venusian bow shock and decreases in the upstream with the distance away from the shock. Downstream of Venusian b…
The MEFISTO and WPT Electric Field Sensors of the Plasma Wave Investigation on the BepiColombo Mio Spacecraft
Kallio, E.; Wahlund, J. -E.; Bylander, L. +13 more
This paper describes the design of MEFISTO (Mercury Electric Field In-Situ Tool) and WPT (Wire Probe Antenna) electric field sensors for Plasma Wave Investigation (PWI) on the BepiColombo Mio spacecraft (Mercury Magnetospheric Orbiter, MMO). The two sensors will enable the first observations of electric fields, plasma waves and radio waves in and …