Search Publications
The Rich Dynamics of Jupiter’s Great Red Spot from JunoCam: Juno Images
Hansen, C. J.; Bolton, S.; Hueso, R. +6 more
We have used high-resolution images obtained with JunoCam onboard the Juno spacecraft during its close flyby of Jupiter on 2017 July 11, to study the dynamics of the Great Red Spot (GRS) at the upper cloud level. We have measured the horizontal velocity and vorticity fields using the clouds as tracers of the flow. We have analyzed a variety of clo…
Isochrone fitting in the Gaia era
Hekker, Saskia; Mints, Alexey
Context. Currently, galactic exploration is being revolutionized by a flow of new data: Gaia provides measurements of stellar distances and kinematics; growing numbers of spectroscopic surveys provide values of stellar atmospheric parameters and abundances of elements; and Kepler and K2 missions provide asteroseismic information for an increasing …
Global MHD Simulations of the Earth's Bow Shock Shape and Motion Under Variable Solar Wind Conditions
Eastwood, J. P.; Schwartz, S. J.; Mejnertsen, L. +2 more
Empirical models of the Earth's bow shock are often used to place in situ measurements in context and to understand the global behavior of the foreshock/bow shock system. They are derived statistically from spacecraft bow shock crossings and typically treat the shock surface as a conic section parameterized according to a uniform solar wind ram pr…
Long-lasting injection of solar energetic electrons into the heliosphere
Temmer, M.; Veronig, A.; Gómez-Herrero, R. +3 more
Context. The main sources of solar energetic particle (SEP) events are solar flares and shocks driven by coronal mass ejections (CMEs). While it is generally accepted that energetic protons can be accelerated by shocks, whether or not these shocks can also efficiently accelerate solar energetic electrons is still debated. In this study we present …
Constraining the polarization content of gravitational waves with astrometry
O'Beirne, Logan; Cornish, Neil J.
Gravitational waves perturb the paths of photons, impacting both the time of flight and the arrival direction of light from stars. Pulsar timing arrays can detect gravitational waves by measuring the variations in the time of flight of radio pulses, while astrometry missions such as Gaia can detect gravitational waves from the time-varying changes…
Expected spectral characteristics of (101955) Bennu and (162173) Ryugu, targets of the OSIRIS-REx and Hayabusa2 missions
Pinilla-Alonso, N.; Licandro, J.; Campins, H. +9 more
NASA's OSIRIS-REx and JAXA's Hayabusa2 sample-return missions are currently on their way to encounter primitive near-Earth asteroids (101955) Bennu and (162173) Ryugu, respectively. Spectral and dynamical evidence indicates that these near-Earth asteroids originated in the inner part of the main belt. There are several primitive collisional famili…
Effects of non-Kozai mutual inclinations on two-planet system stability through all phases of stellar evolution
Gänsicke, Boris T.; Dobbs-Dixon, Ian; Veras, Dimitri +1 more
Previous full-lifetime simulations of single-star multi-planet systems across all phases of stellar evolution have predominately assumed coplanar or nearly coplanar orbits. Here we assess the consequences of this assumption by removing it and exploring the effect of giant branch mass loss on the stability of two-planet systems with small to modera…
Filament Eruption with a Deflection of Nearly 90 Degrees
Yang, Jiayan; Chen, Hechao; Dai, Jun +2 more
Using the data from the Solar Dynamics Observatory, the Ahead of Solar Terrestrial Relations Observatory, the Global Oscillation Network Group (GONG), and the Large Angle and Spectrometric Coronagraphs, the nearly 90° deflected eruption of a filament and the following coronal mass ejection (CME) occurring on the northern edge of AR 11123 on 2010 N…
Kepler Object of Interest Network. II. Photodynamical modelling of Kepler-9 over 8 years of transit observations
Mallonn, M.; Becker, A. C.; Ribas, I. +14 more
Context. The Kepler Object of Interest Network (KOINet) is a multi-site network of telescopes around the globe organised to follow up transiting planet-candidate Kepler objects of interest (KOIs) with large transit timing variations (TTVs). Its main goal is to complete their TTV curves, as the Kepler telescope no longer observes the original Keple…
Mapping UV properties throughout the Cosmic Horseshoe: lessons from VLT-MUSE
Carniani, Stefano; Pettini, Max; James, Bethan L. +3 more
We present the first spatially resolved rest-frame ultraviolet (UV) study of the gravitationally lensed galaxy, the `Cosmic Horseshoe' (J1148+1930) at z = 2.38. Our gravitational lens model shows that the system is made up of four star-forming regions, each ∼4-8 kpc2 in size, from which we extract four spatially exclusive regional spect…