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Effects of radial motion on interchange injections at Saturn
Krupp, N.; Thomsen, M. F.; Jackman, C. M. +12 more
Charged particle injections are regularly observed in Saturn's inner magnetosphere by Cassini. They are attributed to an ongoing process of flux-tube interchange driven by the strong centrifugal force associated with Saturn's rapid rotation. Numerical simulations suggest that these interchange injections can be associated with inward flow channels…
Jupiter's X-ray and EUV auroras monitored by Chandra, XMM-Newton, and Hisaki satellite
Hasegawa, H.; Fujimoto, M.; Masters, A. +17 more
Jupiter's X-ray auroral emission in the polar cap region results from particles which have undergone strong field-aligned acceleration into the ionosphere. The origin of precipitating ions and electrons and the time variability in the X-ray emission are essential to uncover the driving mechanism for the high-energy acceleration. The magnetospheric…
SPT0346-52: Negligible AGN Activity in a Compact, Hyper-starburst Galaxy at z = 5.7
Béthermin, M.; Brandt, W. N.; Murphy, E. J. +20 more
We present Chandra ACIS-S and Australia Telescope Compact Array (ATCA) radio continuum observations of the strongly lensed dusty, star-forming galaxy SPT-S J034640-5204.9 (hereafter SPT0346-52) at z = 5.656. This galaxy has also been observed with ALMA, HST, Spitzer, Herschel, Atacama Pathfinder EXperiment, and the Very Large Telescope. Previous o…
Multi-band morpho-Spectral Component Analysis Deblending Tool (MuSCADeT): Deblending colourful objects
Starck, J. -L.; Courbin, F.; Joseph, R.
We introduce a new algorithm for colour separation and deblending of multi-band astronomical images called MuSCADeT which is based on Morpho-spectral Component Analysis of multi-band images. The MuSCADeT algorithm takes advantage of the sparsity of astronomical objects in morphological dictionaries such as wavelets and their differences in spectra…
Two-point observations of low-frequency waves at 67P/Churyumov-Gerasimenko during the descent of PHILAE: comparison of RPCMAG and ROMAP
Goetz, Charlotte; Tsurutani, Bruce T.; Richter, Ingo +11 more
The European Space Agency's spacecraft ROSETTA has reached its final destination, comet 67P/Churyumov-Gerasimenko. Whilst orbiting in the close vicinity of the nucleus the ROSETTA magnetometers detected a new type of low-frequency wave possibly generated by a cross-field current instability due to freshly ionized cometary water group particles. Du…
Multi-viewpoint Observations of a Widely distributed Solar Energetic Particle Event: The Role of EUV Waves and White-light Shock Signatures
Hillaris, A.; Patsourakos, S.; Nindos, A. +4 more
On 2012 March 7, two large eruptive events occurred in the same active region within 1 hr from each other. Each consisted of an X-class flare, a coronal mass ejection (CME), an extreme-ultraviolet (EUV) wave, and a shock wave. The eruptions gave rise to a major solar energetic particle (SEP) event observed at widely separated (∼120°) points in the…
Comparing [C II] , HI, and CO Dynamics of Nearby Galaxies
Boquien, M.; Armus, L.; Walter, F. +12 more
The H I and CO components of the interstellar medium (ISM) are usually used to derive the dynamical mass {M}{{dyn}} of nearby galaxies. Both components become too faint to be used as a tracer in observations of high-redshift galaxies. In those cases, the 158 µm line of atomic carbon ([C II]) may be the only way to derive {M}{…
KROSS: mapping the Hα emission across the star formation sequence at z ≈ 1
Swinbank, A. M.; Magdis, Georgios E.; Bureau, Martin +7 more
We present first results from the KMOS (K-band Multi-Object Spectrograph) Redshift One Spectroscopic Survey, an ongoing large kinematical survey of a thousand, z ∼ 1 star-forming galaxies, with VLT KMOS. Out of the targeted galaxies (∼500 so far), we detect and spatially resolve Hα emission in ∼90 and 77 per cent of the sample, respectively. Based…
PICS: Simulations of Strong Gravitational Lensing in Galaxy Clusters
Florian, Michael K.; Gladders, Michael D.; Li, Nan +5 more
Gravitational lensing has become one of the most powerful tools available for investigating the “dark side” of the universe. Cosmological strong gravitational lensing, in particular, probes the properties of the dense cores of dark matter halos over decades in mass and offers the opportunity to study the distant universe at flux levels and spatial…
Hot prominence detected in the core of a coronal mass ejection: Analysis of SOHO/UVCS Lα and SOHO/LASCO visible-light observations
Heinzel, P.; Anzer, U.; Jejčič, S. +2 more
Context. The paper deals with the physics of erupting prominences in the core of coronal mass ejections (CME).
Aims: We determine the physical parameters of an erupting prominence embedded in the core of a CME using SOHO/UVCS hydrogen Lα and Lβ lines and SOHO/LASCO visible light observations. In particular we analyze the CME event observed on…