Search Publications
Spontaneous emission of electromagnetic and electrostatic fluctuations in magnetized plasmas: Quasi-parallel modes
Kim, Sunjung; Yoon, Peter H.; Choe, G. S.
The present paper is devoted to the theoretical and numerical analysis of the spontaneously emitted electromagnetic fluctuations characterized by quasi-parallel wave vectors relative to the ambient magnetic field. The formulation is based upon the Klimontovich plasma kinetic theory. The comparative study is carried out between the spontaneously em…
Gaia transient detection efficiency: hunting for nuclear transients
Harrison, D. L.; Walton, N. A.; Wyrzykowski, Ł. +5 more
We present a study of the detectability of transient events associated with galaxies for the Gaia European Space Agency astrometric mission. We simulated the on-board detections, and on-ground processing for a mock galaxy catalogue to establish the properties required for the discovery of transient events by Gaia, specifically tidal disruption eve…
Spatial distribution of jovian clouds, hazes and colors from Cassini ISS multi-spectral images
Hueso, R.; Sánchez-Lavega, A.; Pérez-Hoyos, S. +1 more
The Cassini spacecraft made a gravity assist flyby of Jupiter in December 2000. The Imaging Science Subsystem (ISS) acquired images of the planet that covered the visual range with filters sensitive to the distribution of clouds and hazes, their altitudes and color. We use a selection of these images to build high-resolution cylindrical maps of th…
Reconstruction of small-scale galaxy cluster substructure with lensing flexion
Bradač, Maruša; Cain, Benjamin; Levinson, Rebecca
We present reconstructions of galaxy-cluster-scale mass distributions from simulated gravitational lensing data sets including strong lensing, weak lensing shear, and measurements of quadratic image distortions - flexion. The lensing data is constructed to make a direct comparison between mass reconstructions with and without flexion. We show that…
Solar cycle variations in ion composition in the dayside ionosphere of Titan
Wahlund, J. -E.; Edberg, N. J. T.; Waite, J. H. +4 more
One Titanian year spans over two complete solar cycles, and the solar irradiance has a significant effect on ionospheric densities. Solar cycle 24 has been one of the quietest cycles on record. In this paper we show data from the Cassini ion and neutral mass spectrometer (INMS) and the radio and plasma wave science Langmuir probe spanning the time…
The Cold Dust Content of the Oxygen-rich Supernova Remnant G292.0+1.8
Ghavamian, Parviz; Williams, Brian J.
We present far-infrared images of the Galactic oxygen-rich supernova remnant (SNR) G292.0+1.8, acquired with the PACS and SPIRE instruments of the Herschel Space Observatory. We find that the SNR shell is detected in the PACS blue (100 µm) band, but not in the red (160 µm) band, broadly consistent with results from AKARI observations. …
A Decameter Stationary Type IV Burst in Imaging Observations on 2014 September 6
Koval, Artem; Stanislavsky, Aleksander; Chen, Yao +3 more
First-of-its-kind radio imaging of a decameter solar stationary type IV radio burst has been presented in this paper. On 2014 September 6 the observations of type IV burst radio emission were carried out with the two-dimensional heliograph based on the Ukrainian T-shaped radio telescope (UTR-2), together with other telescope arrays. Starting at ∼0…
Ion Bernstein waves in the magnetic reconnection region
Glassmeier, K. -H.; Nakamura, R.; Baumjohann, W. +3 more
Four-dimensional energy spectra and a diagram for dispersion relations are determined for the first time in a magnetic reconnection region in the magnetotail using data from four-spacecraft measurements by the Cluster mission on a spatial scale of 200 km, about 0.1 ion inertial lengths. The energy spectra are anisotropic with an extension in the p…
Cluster observations of non-time continuous magnetosonic waves
Boardsen, Scott A.; Sibeck, David G.; Walker, Simon N. +3 more
Equatorial magnetosonic waves are normally observed as temporally continuous sets of emissions lasting from minutes to hours. Recent observations, however, have shown that this is not always the case. Using Cluster data, this study identifies two distinct forms of these non-temporally continuous emissions. The first, referred to as rising tone emi…
Multi-wavelength Study of HESS J1741-302
Kargaltsev, Oleg; Sonbas, Eda; Hare, Jeremy +2 more
We present the results of two Chandra X-ray Observatory (CXO) observations of TeV γ-ray source HESS J1741-302. We investigate whether there is any connection between HESS J1741-302 and the sources seen at lower energies. One of the brightest X-ray sources in the HESS J1741-302 field, CXOU J174112.1-302908, appears to be associated with a low-mass …