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Source Regions of the Type II Radio Burst Observed During a CME-CME Interaction on 2013 May 22
Krupar, V.; Gopalswamy, N.; Mäkelä, P. +2 more
We report on our study of radio source regions during the type II radio burst on 2013 May 22 based on direction-finding analysis of the Wind/WAVES and STEREO/WAVES (SWAVES) radio observations at decameter-hectometric wavelengths. The type II emission showed an enhancement that coincided with the interaction of two coronal mass ejections (CMEs) lau…
Systematic processing of Mars Express HRSC panchromatic and colour image mosaics: Image equalisation using an external brightness reference
Jaumann, R.; van Gasselt, S.; Dumke, A. +8 more
After more than ten years in orbit at Mars, the coverage from the High Resolution Stereo Camera (HRSC) on the European Space Agency's Mars Express is sufficient to begin constructing mosaic products on a global scale. We describe our systematic processing procedure and, in particular, the technique used to bring images affected by atmospheric dust…
Stellar Boron Abundances near the Main-sequence Turnoff of the Open Cluster NGC 3293 and Implications for the Efficiency of Rotationally Driven Mixing in Stellar Envelopes
Langer, Norbert; Proffitt, Charles R.; Lennon, Daniel J. +1 more
Spectra from the Hubble Space Telescope Cosmic Origins Spectrograph and the Space Telescope Imaging Spectrograph covering the B III resonance line have been obtained for 10 early-B stars near the turnoff of the young Galactic open cluster NGC 3293. This is the first sample of boron abundance determinations in a single, clearly defined population o…
Observation and Analysis of Ballistic Downflows in an M-class Flare with the Interface Region Imaging Spectrograph
Brannon, Sean R.
Despite significant advances in instrumentation, there remain no studies that analyze observations of on-disk flare loop plasma flows covering the entire evolution from chromospheric evaporation, through plasma cooling, to draining downflows. We present results from an imaging and spectroscopic observation from the Interface Region Imaging Spectro…
Operating modes and cooling capabilities of the 3-stage ADR developed for the Soft-X-ray Spectrometer instrument on Astro-H
Kelley, Richard L.; Porter, Frederick S.; DiPirro, Michael J. +8 more
A 3-stage adiabatic demagnetization refrigerator (ADR) (Shirron et al., 2012) is used on the Soft X-ray Spectrometer instrument (Mitsuda et al., 2010) on Astro-H (Takahashi et al., 2010) [3] to cool a 6 × 6 array of X-ray microcalorimeters to 50 mK. The ADR is supported by a cryogenic system (Fujimoto et al., 2010) consisting of a superfluid heliu…
Geometrical beaming of stellar mass ULXs
Middleton, Matthew J.; King, Andrew
The presence or lack of eclipses in the X-ray light curves of ultraluminous X-ray sources (ULXs) can be directly linked to the accreting system geometry. In the case where the compact object is stellar mass and radiates isotropically, we should expect eclipses by a main-sequence to sub-giant secondary star on the recurrence time-scale of hours to …
Electrostatic and electromagnetic fluctuations detected inside magnetic flux ropes during magnetic reconnection
Wang, Shui; Li, Xing; Huang, Can +6 more
A series of magnetic flux ropes embedded in the ion diffusion region of a magnetotail magnetic reconnection event were investigated in this paper. Waves near the lower hybrid frequency were measured within each of the flux ropes and can be associated with the enhancements of energetic electrons in some of the flux ropes. The waves in the largest f…
Characteristics of quasi-monochromatic ULF waves in the Venusian foreshock
Zhang, Tielong; Mazelle, Christian; Lu, Quanming +5 more
The statistical properties of ULF waves observed upstream of Venus foreshock are investigated. The study is restricted to waves which are observed well below the local proton cyclotron frequency. Using the magnetic field observations from Venus Express between May 2006 and February 2012, 115 quasi-monochromatic ULF wave trains have been identified…
Dark matter implications of the WMAP-Planck Haze
Pierpaoli, Elena; Egorov, A. E.; Gaskins, Jennifer M. +1 more
Gamma rays and microwave observations of the Galactic Center and surrounding areas indicate the presence of anomalous emission, whose origin remains ambiguous. The possibility of dark matter annihilation explaining both signals through prompt emission at gamma rays and secondary emission at microwave frequencies from interactions of high-energy el…
Three-dimensional development of front region of plasma jets generated by magnetic reconnection
Nakamura, R.; Baumjohann, W.; Shinohara, I. +2 more
A three-dimensional fully kinetic particle-in-cell simulation of antiparallel magnetic reconnection is performed to investigate the three-dimensional development of reconnection jet fronts treating three instabilities: the lower hybrid drift instability (LHDI), the ballooning/interchange instability (BICI), and the ion-ion kink instability. Suffic…