Search Publications
Missions
Journals
Publication Years
The climatology of carbon monoxide on Mars as observed by NOMAD nadir-geometry observations
Vandaele, Ann Carine; Liuzzi, Giuliano; Daerden, Frank +10 more
More than a full Martian year of observations have now been made by the Nadir Occultation for MArs Discovery (NOMAD) instrument suite on-board the ExoMars Trace Gas Orbiter. Radiative transfer modeling of NOMAD observations taken in the nadir geometry enable the seasonal and global-scale variations of carbon monoxide gas in the Martian atmosphere …
Polar Vortices in Planetary Atmospheres
Teanby, Nicholas A.; Mitchell, Dann M.; Seviour, William J. M. +4 more
Among the great diversity of atmospheric circulation patterns observed throughout the solar system, polar vortices stand out as a nearly ubiquitous planetary-scale phenomenon. In recent years, there have been significant advances in the observation of planetary polar vortices, culminating in the fascinating discovery of Jupiter's polar vortex clus…
Solar Modulation of Galactic Cosmic-Ray Protons Based on a Modified Force-field Approach
Qin, Gang; Shen, Zhenning; Yang, Hao +4 more
In this work, a modified force-field approach is established to investigate the long-term solar modulation of galactic cosmic-ray (GCR) protons. In this approach, the solar modulation potential φ is assumed to be energy dependent. As φ also depends on the local interstellar spectrum (LIS), a new proton LIS model is first presented based on data fr…
Propagation of Ultralow Frequency Waves from the Ion Foreshock into the Magnetosphere During the Passage of a Magnetic Cloud
Pfau-Kempf, Yann; Ganse, Urs; Battarbee, Markus +12 more
We have examined the properties of ultralow frequency (ULF) waves in space (the ion foreshock, magnetosheath, and magnetosphere) and at dayside magnetometer stations (L = 1.6-6.5) during Earth's encounter with a magnetic cloud in the solar wind, which is characterized by magnetic fields with large magnitudes (∼14 nT) and small cone angles (∼30°). …
NEOExchange - an online portal for NEO and Solar System science
Lister, T. A.; Gomez, E.; Chatelain, J. +4 more
Las Cumbres Observatory (LCO) has deployed a homogeneous telescope network of ten 1-m telescopes to four locations in the northern and southern hemispheres, with a planned network size of twelve 1-m telescopes at 6 locations. This network is very versatile and is designed to respond rapidly to target of opportunity events and also to perform long …
Determining the source and eruption dynamics of a stealth CME using NLFFF modelling and MHD simulations
Yardley, S. L.; Pagano, P.; Mackay, D. H. +1 more
Context. Coronal mass ejections (CMEs) that exhibit weak or no eruption signatures in the low corona, known as stealth CMEs, are problematic as upon arrival at Earth they can lead to geomagnetic disturbances that were not predicted by space weather forecasters.
Aims: We investigate the origin and eruption of a stealth event that occurred on 2…
A parsec-scale faint jet in the nearby changing-look Seyfert galaxy Mrk 590
Komossa, S.; Paragi, Zsolt; Yuan, Feng +9 more
Broad Balmer emission lines in active galactic nuclei (AGN) may display dramatic changes in amplitude, even disappearance and re-appearance in some sources. As a nearby galaxy at a redshift of z = 0.0264, Mrk 590 suffered such a cycle of Seyfert type changes between 2006 and 2017. Over the last 50 yr, Mrk 590 also underwent a powerful continuum ou…
The Impact of Turbulence on Physics of the Geomagnetic Tail
Antonova, Elizaveta E.; Stepanova, Marina V.
There is a vast amount of evidence that suggests that the geomagnetic tail is like a turbulent wake behind an obstacle. Large-scale vortices in the wake are able to generate turbulent transport that takes place both along the plasma sheet, in the X and Y directions, and across the plasma sheet, in the Z direction. Thus, turbulent fluctuations in a…
Superresolving Herschel imaging: a proof of concept using Deep Neural Networks
Serjeant, Stephen; Wang, Wei-Hao; Lim, Chen-Fatt +4 more
Wide-field submillimetre surveys have driven many major advances in galaxy evolution in the past decade, but without extensive follow-up observations the coarse angular resolution of these surveys limits the science exploitation. This has driven the development of various analytical deconvolution methods. In the last half a decade Generative Adver…
Magnetohydrodynamic Modeling of the Solar Corona with an Effective Implicit Strategy
Shen, Fang; Feng, Xueshang; Xiang, Changqing +4 more
In this paper, we design an effective and robust model to solve the 3D single-fluid solar wind plasma magnetohydrodynamics (MHD) problem of low plasma β. This MHD model is formulated on a six-component composite grid system free of polar singularities. The computational domain ranges from the solar surface to the super-Alfvénic region. As common t…