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The origin and evolution of Saturn’s 2011-2012 stratospheric vortex
Fletcher, Leigh N.; Sánchez-Lavega, A.; García-Melendo, E. +12 more
The planet-encircling springtime storm in Saturn’s troposphere (December 2010-July 2011, Fletcher, L.N. et al. [2011]. Science 332, 1413-1414; Sánchez-Lavega, A. et al. [2011]. Nature 475, 71-74; Fischer, G. et al. [2011]. Nature 475, 75-77) produced dramatic perturbations to stratospheric temperatures, winds and composition at mbar pressures that…
Spontaneous Chiral Symmetry Breaking of Hall Magnetohydrodynamic Turbulence
Galtier, Sébastien; Meyrand, Romain
Hall magnetohydrodynamics (MHD) is investigated through three-dimensional direct numerical simulations. We show that the Hall effect induces a spontaneous chiral symmetry breaking of the turbulent dynamics. The normalized magnetic polarization is introduced to separate the right- (R) and left-handed (L) fluctuations. A classical k-7/3 s…
X-Ray View of the Shock Front in the Merging Cluster Abell 3376 with Suzaku
Fukazawa, Yasushi; Nakazawa, Kazuhiro; Ohashi, Takaya +3 more
We report on a Suzaku measurement of the shock feature associated with the western radio relic in the merging cluster A 3376. The temperature profile is characterized by an almost flat radial shape with kT ∼ 4 keV within 0.5r200 and a rise by about 1 keV inside the radio relic. Across the relic region (0.6-0.8r200), the tempe…
Source-plane Reconstruction of the Bright Lensed Galaxy RCSGA 032727-132609
Rigby, Jane R.; Barrientos, L. Felipe; Sharon, Keren +4 more
We present new Hubble Space Telescope/Wide Field Camera 3 imaging data of RCSGA 032727-132609, a bright lensed galaxy at z = 1.7 that is magnified and stretched by the lensing cluster RCS2 032727-132623. Using this new high-resolution imaging, we modify our previous lens model (which was based on ground-based data) to fully understand the lensing …
Most Mars minerals in a nutshell: Various alteration phases formed in a single environment in Noctis Labyrinthus
Murchie, Scott L.; Mustard, John F.; Le Mouélic, Stéphane +7 more
A closed depression in the Noctis Labyrinthus region of Mars (at 10.4°S, 98.6°W), believed to have formed in the Late Hesperian, holds an inner pit partially filled with several hundred meters of stratified material. Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) visible-near infrared reflectance data reveal signatures of numerous hy…
A Remarkable Long-term Light Curve and Deep, Low-state Spectroscopy: Swift and XMM-Newton Monitoring of the NLS1 Galaxy Mkn 335
Fabian, Andrew C.; Komossa, S.; Gallo, Luigi C. +5 more
The narrow-line Seyfert 1 galaxy (NLS1) Mkn 335 is remarkable because it has repeatedly shown deep, long X-ray low states that show pronounced spectral structure. It has become one of the prototype active galactic nuclei (AGNs) in deep minimum X-ray states. Here we report on the continuation of our ongoing monitoring campaign with Swift and the ex…
Non-diffusive resonant acceleration of electrons in the radiation belts
Artemyev, A. V.; Agapitov, O. V.; Krasnoselskikh, V. V. +2 more
We describe a mechanism of resonant electron acceleration by oblique high-amplitude whistler waves under conditions typical for the Earth radiation belts. We use statistics of spacecraft observations of whistlers in the Earth radiation belts to obtain the dependence of the angle θ between the wave-normal and the background magnetic field on magnet…
Unidentified sources in the Fermi-LAT second source catalog: the case for DM subhalos
Horns, Dieter; Zechlin, Hannes-S.
The Large Area Telescope (LAT) aboard the Fermi satellite allows us to study the high-energy γ-ray sky with unprecedented sensitivity. However, the origin of 31% of the detected γ-ray sources remains unknown. This population of unassociated γ-ray sources may contain new object classes, among them sources of photons from self-annihilating or decayi…
The Assembly History of Disk Galaxies. II. Probing the Emerging Tully-Fisher Relation during 1 < z < 1.7
Treu, Tommaso; Ellis, Richard S.; Newman, Andrew B. +3 more
Through extended integrations using the recently installed deep depletion CCD on the red arm of the Keck I Low Resolution Imaging Spectrograph, we present new measurements of the resolved spectra of 70 morphologically selected star-forming galaxies with i AB < 24.1 in the redshift range 1 <~ z < 1.7. Using the formalism introdu…
IDCS J1426.5+3508: Sunyaev-Zel'dovich Measurement of a Massive Infrared-selected Cluster at z = 1.75
Stern, D.; Carlstrom, J. E.; Leitch, E. M. +14 more
We report 31 GHz CARMA observations of IDCS J1426.5+3508, an infrared-selected galaxy cluster at z = 1.75. A Sunyaev-Zel'dovich (SZ) decrement is detected toward this cluster, indicating a total mass of M 200, m = (4.3 ± 1.1) × 1014 M ⊙ in agreement with the approximate X-ray mass of ~5 × 1014 M ⊙<…