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ZFIRE: The Kinematics of Star-forming Galaxies as a Function of Environment at z ∼ 2
Kewley, Lisa J.; Allen, Rebecca J.; Kacprzak, Glenn G. +12 more
We perform a kinematic analysis of galaxies at z ∼ 2 in the COSMOS legacy field using near-infrared (NIR) spectroscopy from Keck/MOSFIRE as part of the ZFIRE survey. Our sample consists of 75 Ks-band selected star-forming galaxies from the ZFOURGE survey with stellar masses ranging from log(M ⋆/M ⊙) = 9.0-11.0, 28 of which ar…
Commentary on accessing 3-D currents in space: Experiences from Cluster
Dunlop, M. W.; Haaland, S.; Dong, X. -C. +1 more
The curlometer was introduced to estimate the electric current density from four-point measurements in space; anticipating the realization of the four spacecraft Cluster mission which began full science operations in February 2001. The method uses Ampère's law to estimate current from the magnetic field measurements, suitable for the high-conducti…
How Janus' orbital swap affects the edge of Saturn's A ring?
Nicholson, Philip D.; French, Richard G.; Hedman, Matthew M. +6 more
We present a study of the behavior of Saturn's A ring outer edge, using images and occultation data obtained by the Cassini spacecraft over a period of 8 years from 2006 to 2014. More than 5000 images and 170 occultations of the A ring outer edge are analyzed. Our fits confirm the expected response to the Janus 7:6 Inner Lindblad resonance (ILR) b…
Probing a panoply of curvaton-decay scenarios using CMB data
Grin, Daniel; Smith, Tristan L.
In the curvaton scenario, primordial curvature perturbations are produced by a second field that is subdominant during inflation. Depending on how the curvaton decays [possibly producing baryon number, lepton number, or cold dark matter (CDM)], mixtures of correlated isocurvature perturbations are produced, allowing the curvaton scenario to be tes…
Solar Jet-Coronal Hole Collision and a Closely Related Coronal Mass Ejection
Chen, Yao; Zheng, Ruisheng; Du, Guohui +1 more
Jets are defined as impulsive, well-collimated upflows, occurring in different layers of the solar atmosphere with different scales. Their relationship with coronal mass ejections (CMEs), another type of solar impulsive events, remains elusive. Using high-quality imaging data from the Atmospheric Imaging Assembly/Solar Dynamics Observatory, we sho…
Activity from the Be/X-ray binary system V0332+53 during its intermediate-luminosity outburst in 2008
Garrido, R.; Özbey Arabacı, M.; Camero-Arranz, A. +7 more
Aims: We present a study of the Be/X-ray binary system V 0332+53 with the main goal of characterizing its behaviour mainly during the intermediate-luminosity X-ray event in 2008. In addition, we aim to contribute to the understanding of the behaviour of the donor companion by including optical data from our dedicated campaign starting in 2006…
Observed IRIS Profiles of the h and k Doublet of Mg II and Comparison with Profiles from Quiescent Prominence NLTE Models
Heinzel, Petr; Kleint, Lucia; Vial, Jean-Claude +2 more
With the launch of the Interface Region Imaging Spectrograph (IRIS) mission, it is now possible to obtain high-resolution solar prominence spectra and to begin to distinguish the contributions of the many (apparent or not) threads that structure prominences. We aim at comparing unique observations obtained in the Mg II h and k lines of a polar cro…
Characterization of Saturn's bow shock: Magnetic field observations of quasi-perpendicular shocks
Dougherty, M. K.; Masters, A.; Sulaiman, A. H.
Collisionless shocks vary drastically from terrestrial to astrophysical regimes resulting in radically different characteristics. This poses two complexities. First, separating the influences of these parameters on physical mechanisms such as energy dissipation. Second, correlating observations of shock waves over a wide range of each parameter, e…
The ultraluminous X-ray source NGC 5643 ULX1: a large stellar mass black hole accreting at super-Eddington rates?
Pintore, Fabio; Middleton, Matthew J.; Sutton, Andrew D. +3 more
A sub-set of the brightest ultraluminous X-ray sources (ULXs), with X-ray luminosities well above 1040 erg s-1, typically have energy spectra which can be well described as hard power laws, and short-term variability in excess of ∼10 per cent. This combination of properties suggests that these ULXs may be some of the best can…
Suzaku and XMM-Newton observations of the newly discovered early-stage cluster merger of 1E2216.0-0401 and 1E2215.7-0404
Urdampilleta, I.; Kaastra, J. S.; Mernier, F. +6 more
We present the results of Suzaku and XMM-Newton X-ray observations of the cluster pair