Search Publications
Investigating magnetospheric interaction effects on Titan's ionosphere with the Cassini orbiter Ion Neutral Mass Spectrometer, Langmuir Probe and magnetometer observations during targeted flybys
Luhmann, J. G.; Russell, C. T.; Dougherty, M. K. +13 more
In the ∼6 years since the Cassini spacecraft went into orbit around Saturn in 2004, roughly a dozen Titan flybys have occurred for which the Ion Neutral Mass Spectrometer (INMS) measured that moon's ionospheric density and composition. For these, and for the majority of the ∼60 close flybys probing to altitudes down to ∼950 km, Langmuir Probe elec…
Non-standard Energy Spectra of Shock-accelerated Solar Particles
Vainio, Rami; Valtonen, Eino; Kocharov, Leon +3 more
We consider a numerical model for the shock acceleration of energetic ions in the magnetic environment of the solar corona. The model is motivated by observations of the deka-to-hecto-MeV proton energy spectra, ion and electron timing, and abundances in the beginning of major solar energetic particle (SEP) events, prior to the event's main phase a…
Morphometry of Great Basin pluvial shore landforms: Implications for paleolake basins on Mars
Zimbelman, James R.; Irwin, Rossman P., III
Many basins with relict contributing valley networks and outlet valleys in the Martian highlands indicate past flowing and ponded water on the surface. These likely paleolakes motivate an investigation of pluvial shore landforms in the Great Basin region of the western United States, as confident identification of strandlines on Mars would facilit…
The Infrared Properties of Sources Matched in the WISE All-sky and Herschel ATLAS Surveys
Gardner, Jonathan P.; Tsai, Chao-Wei; Cava, Antonio +34 more
We describe the infrared properties of sources detected over ~36 deg2 of sky in the GAMA 15 hr equatorial field, using data from both the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) and Wide-field Infrared Survey (WISE). With 5σ point-source depths of 34 and 0.048 mJy at 250 µm and 3.4 µm, respectively, we a…
Charging of ice grains in Saturn's E ring: theory and observations
Misra, Shikha; Mishra, S. K.; Sodha, M. S.
We have developed a theoretical model for a physical understanding of the charging of ice grains in the plasma of Saturn's E ring. The evaluated results are compared with the available observations and measurements from the Cassini, Hubble Space Telescope, Voyager and Pioneer campaigns. In this formulation, we implement the uniform potential theor…
INTEGRAL and Swift Observations of the Be X-Ray Binary 4U 1036-56 (RX J1037.5-5647) and its Possible Relation with γ-Ray Transients
Torres, Diego F.; Li, Jian; Chen, Yupeng +3 more
We present timing, spectral, and long-term temporal analysis of the high-mass X-ray binary 4U 1036-56 using INTEGRAL and Swift observations. We show that it is a weak hard X-ray source spending a major fraction of the time in quiescence and only occasionally characterized by X-ray outbursts. The outburst activity we report here lasts several days,…
Large-scale deformational systems in the South Polar Layered Deposits (Promethei Lingula, Mars): "Soft-sediment" and Deep-Seated Gravitational Slope Deformations Mechanisms
Marinangeli, Lucia; Guallini, Luca; Brozzetti, Francesco
The present study is the first attempt at a detailed structural and kinematic analysis of large-scale deformational systems observed in the South Polar Layered Deposits (SPLDs) in the Promethei Lingula (PL) margins (Mars). By systematically collecting attitude data referable to previously unknown deformational structures and defining the cross-cut…
Constraining stellar assembly and active galactic nucleus feedback at the peak epoch of star formation
Ryan, R. E.; O'Connell, R. W.; Hathi, N. P. +9 more
We study stellar assembly and feedback from active galactic nuclei (AGN) around the epoch of peak star formation (1 ≲z≲ 2), by comparing hydrodynamic simulations to rest-frame UV-optical galaxy colours from the Wide Field Camera 3 (WFC3) Early Release Science (ERS) programme. Our adaptive mesh refinement simulations include metal-dependent radiati…
Observational Limits on the Gas Mass of a z = 4.9 Galaxy
Smail, Ian; Swinbank, A. M.; Bower, R. G. +6 more
We present the results of a search for molecular gas emission from a star-forming galaxy at z = 4.9. The galaxy benefits from magnification of 22 ± 5 × due to strong gravitational lensing by the foreground cluster MS1358+62. We target the CO(5-4) emission at a known position and redshift from existing Hubble Space Telescope/Advanced Camera for Sur…
Golden gravitational lensing systems from the Sloan Lens ACS Survey - II. SDSS J1430+4105: a precise inner total mass profile from lensing alone
Seitz, Stella; Eichner, Thomas; Bauer, Anne
We study the Sloan Lens ACS (SLACS) survey strong-lensing system SDSS J1430+4105 at zl = 0.285. The lensed source (zs = 0.575) of this system has a complex morphology with several subcomponents. Its subcomponents span a radial range from 4 to 10 kpc in the plane of the lens. Therefore, we can constrain the slope of the total …