Search Publications
In situ evidence for interplanetary magnetic field induced tail twisting associated with relative displacement of conjugate auroral features
Rème, H.; Sato, N.; Ogawa, Y. +4 more
We provide in situ evidence for a twisted near-Earth tail configuration that is responsible for the time sequence of conjugate auroral features associated with relative interhemispheric displacement during a weak substorm, as reported by Motoba et al. (2010). We analyzed the magnetic field data observed using four Cluster satellites in the vicinit…
The various contributions in Venus rotation rate and LOD
Souchay, J.; Lebonnois, S.; Rambaux, N. +1 more
Context. Thanks to the Venus Express Mission, new data on the properties of Venus could be obtained, in particular concerning its rotation.
Aims: In view of these upcoming results, the purpose of this paper is to determine and compare the major physical processes influencing the rotation of Venus and, more particularly, the angular rotation r…
Distance and temperature from absolute light curves of three eclipsing binaries
Wilson, R. E.; Raichur, H.
Although solutions of arbitrarily scaled eclipsing binary (EB) light curves yield the temperature of only one component (given the other temperature), absolute light curves in two or more bands can directly give temperatures of both stars if combined with radial velocity data and matched to an absolute flux model. Accurate band-to-band flux calibr…
What causes the flux excess in the heliospheric magnetic field?
Smith, Edward J.
Ulysses results indicate that the total magnetic flux inside the heliosphere, Φ, can be obtained from the radial field component measured at a single spacecraft multiplied by the square of the radial distance and averaged over a solar rotation, < r2BR >. However, that result is contrary to a large increase in Φ with dis…
Multilayer simulations for accurate geological interpretations of SHARAD radargrams
Franco, M.; Spagnuolo, M. G.; Grings, F. +3 more
SHARAD (SHAllow RADar) is a nadir-looking Synthetic Aperture Ground Penetrating Radar on board NASA's 2005 Mars Reconnaissance Orbiter. There are three main characteristics that define the performance of this instrument: ground penetration (due to the operational frequency, the observed echoes can be related to reflections from surface or subsurfa…
Longitudinal Drifts of Streamers across the Heliospheric Current Sheet
Morgan, Huw
Potential field source surface (PFSS) extrapolations of the photospheric magnetic field provide a qualitatively correct model of the coronal magnetic structure. We show that the magnetic structure provided by PFSS describes a framework within which high-density coronal streamers are distributed. However, the density structures have considerable fr…
Comparison of Titan's north polar lakes with terrestrial analogs
Byrne, Shane; Sharma, Priyanka
The discovery of hydrocarbon lakes in the polar regions of Titan offers a unique opportunity to compare terrestrial lakes with those in an extraterrestrial setting. We selected 114 terrestrial lakes formed by different processes as analogs for comparison with the 190 Titanian lakes that we had mapped in our previous study. Using the Shuttle Radar …
Simulation of cometary jets in interaction with the solar wind
Glassmeier, K. -H.; Koenders, C.; Motschmann, U. +3 more
The influence of cometary jets on the solar wind interaction is studied with a 3D hybrid simulation. Anisotropic outgassing patterns were until recently not considered in cometary simulations, despite strong anisotropies found at observations. Comet 67P Churyumov-Gerasimenko, the target of the ROSETTA mission, was chosen as a case study for a simu…
Pulsations in the atmosphere of the rapidly oscillating star 33 Lib
Shulyak, D.; Ryabchikova, T.; Hareter, M. +4 more
In 2009, the rapidly oscillating peculiar A-type (roAp) star 33 Lib was the target of an intense observing campaign, combining ground-based spectroscopy with space photometry obtained with the Microvariability and Oscillation of STars (MOST) satellite. We collected 780 spectra using the Echelle Spectro Polarimetric Device for the Observation of St…
A Search for Lyman Break Galaxies in the Chandra Deep Field South Using Swift Ultraviolet/Optical Telescope
Gronwall, Caryl; Hornschemeier, Ann E.; Basu-Zych, Antara R. +2 more
While the Swift satellite is primarily designed to study gamma-ray bursts, its ultraviolet and optical imaging and spectroscopy capabilities are also being used for a variety of scientific programs. In this study, we use the UV/Optical Telescope (UVOT) instrument on board Swift to discover 0.5 < z < 2 Lyman break galaxies (LBGs). UVOT has co…