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Identification of emission sources of umbral flashes using phase congruency
Feng, Song; Ji, Kai-Fan; Yang, Yun-Fei +1 more
The emission sources of umbral flashes (UFs) are believed to be closely related to running umbral and penumbral waves, and are concluded to be associated with umbral dots in the solar photosphere. Accurate identification of emission sources of UFs is crucial for investigating these physical phenomena and their inherent relationships. A relatively …
Dayside episodic ion outflow from Martian magnetic cusps and/or magnetosheath boundary motion associated with plasma oscillations
Gurnett, D. A.; Lundin, R.; Winningham, J. D. +4 more
The radar sounder on the Mars Express Spacecraft is able to make measurements of electron densities in the Martian ionosphere from both local electron plasma oscillations and remote soundings. A study of thousands of orbits shows that in some cases the electron plasma oscillations disappear and reappear abruptly near the upper boundary of the days…
Observations of the early stages in the formation of an LBV shell
González, Ricardo F.; Koenigsberger, Gloria
Luminous blue variables are massive stars that undergo a series of eruptive events through which they shed their outer layers before becoming Wolf-Rayet stars. During the eruptive events, their winds are denser and expand slower than in the non-eruptive state. In this paper we apply a model for the interaction of the post-eruption fast wind with t…
Hubble Space Telescope Detection of the Double Pulsar System J0737-3039 in the Far-ultraviolet
Pavlov, George G.; Kargaltsev, Oleg; Durant, Martin
We report on detection of the double pulsar system J0737-3039 in the far-UV with the Advanced Camera for Surveys/Solar-blind Channel detector aboard Hubble Space Telescope. We measured the energy flux F = (4.6 ± 1.0) × 10-17 erg cm-2 s-1 in the 1250-1550 Å band, which corresponds to the extinction-corrected luminos…
Western Oceanus Procellarum as seen by C1XS on Chandrayaan-1
Howe, C. J.; Kellett, B. J.; Crawford, I. A. +3 more
We present the analysis of an X-ray fluorescence (XRF) observation of the western part of Oceanus Procellarum on the Moon’s nearside made by the Chandrayaan-1 X-ray Spectrometer on 10th February 2009. Through forward modelling of the X-ray spectra, we provide estimates of the MgO/SiO2 and Al2O3/SiO2 rati…
Near-infrared Brightness of the Galilean Satellites Eclipsed in Jovian Shadow: A New Technique to Investigate Jovian Upper Atmosphere
Honda, C.; Egami, E.; Surace, J. +12 more
Based on observations from the Hubble Space Telescope and the Subaru Telescope, we have discovered that Europa, Ganymede, and Callisto are bright around 1.5 µm even when not directly lit by sunlight. The observations were conducted with non-sidereal tracking on Jupiter outside of the field of view to reduce the stray light subtraction uncert…
A multiwavelength study of the hierarchical triple HD 181068. A test bed for studying star-planet interaction?
Schmitt, J. H. M. M.; Czesla, S.; Schneider, P. C. +1 more
HD 181068 is the only compact, triply eclipsing, hierarchical triple system containing a giant star that is known to date. With its central, highly active G-type giant orbited by a close pair of main-sequence dwarfs, the system is ideal for studying tidal interactions. We carried out a multiwavelength study to characterize the magnetic activity of…
XMM-Newton publication statistics
Parmar, A. N.; Ness, J. -U.; Smith, R. +5 more
We assessed the scientific productivity of XMM-Newton by examining XMM-Newton publications and data usage statistics. We analyse 3272 refereed papers, published until the end of 2012, that directly use XMM-Newton data. The SAO/NASA Astrophysics Data System (ADS) was used to provide additional information on each paper including the number of citat…
Titan's plasma environment: 3D hybrid kinetic modeling of the TA flyby and comparison with CAPS-ELS and RPWS LP observations
Hartle, R. E.; Sittler, E. C.; Cooper, J. F. +2 more
In this report we discuss the global plasma environment of the TA flyby from the perspective of 3D hybrid modeling. In our model the background, pickup, and ionospheric ions are considered as particles, whereas the electrons are described as a fluid. Inhomogeneous photoionization, electron-impact ionization and charge exchange are included in our …
On the possible correlation of Galactic very-high energy source locations and enhancements of the surface density in the Galactic plane
Torres, D. F.; de Oña Wilhelmi, E.; Pedaletti, G.
Aims: The association of very-high energy sources with regions of the sky rich in dust and gas has been noticed in the study of individual very-high energy (VHE; E ≳ 100 GeV) sources. However, the statistical significance of this correlation for the whole population of TeV detections has not been assessed yet. Here, we present a study of the …