Search Publications
The Host Galaxies of Tidal Disruption Events
Zabludoff, Ann I.; French, K. Decker; Graur, Or +2 more
Recent studies of Tidal Disruption Events (TDEs) have revealed unexpected correlations between the TDE rate and the large-scale properties of the host galaxies. In this review, we present the host galaxy properties of all TDE candidates known to date and quantify their distributions. We consider throughout the differences between observationally-i…
Atmospheric Dynamics of Hot Giant Planets and Brown Dwarfs
Showman, Adam P.; Parmentier, Vivien; Tan, Xianyu
Groundbased and spacecraft telescopic observations, combined with an intensive modeling effort, have greatly enhanced our understanding of hot giant planets and brown dwarfs over the past ten years. Although these objects are all fluid, hydrogen worlds with stratified atmospheres overlying convective interiors, they exhibit an impressive diversity…
X-Ray Properties of TDEs
Komossa, S.; Jonker, P. G.; Auchettl, K. +1 more
Observational astronomy of tidal disruption events (TDEs) began with the detection of X-ray flares from quiescent galaxies during the ROSAT all-sky survey of 1990-1991. The flares complied with theoretical expectations, having high peak luminosities (Lx up to ≥4 ×1044erg/s), a thermal spectrum with k T ∼few×105K, a…
Diffuse and Pulsating Aurora
Miyoshi, Yoshizumi; Nishimura, Yukitoshi; Katoh, Yuto +14 more
This chapter reviews fundamental properties and recent advances of diffuse and pulsating aurora. Diffuse and pulsating aurora often occurs on closed field lines and involves energetic electron precipitation by wave-particle interaction. After summarizing the definition, large-scale morphology, types of pulsation, and driving processes, we review o…
Dust-to-Gas and Refractory-to-Ice Mass Ratios of Comet 67P/Churyumov-Gerasimenko from Rosetta Observations
Pätzold, Martin; Choukroun, Mathieu; Thomas, Nicolas +9 more
This chapter reviews the estimates of the dust-to-gas and refractory-to-ice mass ratios derived from Rosetta measurements in the lost materials and the nucleus of 67P/Churyumov-Gerasimenko, respectively. First, the measurements by Rosetta instruments are described, as well as relevant characteristics of 67P. The complex picture of the activity of …
Investigating Mercury's Environment with the Two-Spacecraft BepiColombo Mission
André, N.; Kallio, E.; Barabash, S. +76 more
The ESA-JAXA BepiColombo mission will provide simultaneous measurements from two spacecraft, offering an unprecedented opportunity to investigate magnetospheric and exospheric dynamics at Mercury as well as their interactions with the solar wind, radiation, and interplanetary dust. Many scientific instruments onboard the two spacecraft will be com…
Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team
Liu, Yang; Mangold, Nicolas; Johnson, Jeffrey R. +64 more
The Mars 2020 Perseverance rover landing site is located within Jezero crater, a ∼50 km diameter impact crater interpreted to be a Noachian-aged lake basin inside the western edge of the Isidis impact structure. Jezero hosts remnants of a fluvial delta, inlet and outlet valleys, and infill deposits containing diverse carbonate, mafic, and hydrated…
Perpendicular Transport of Energetic Particles in Magnetic Turbulence
Shalchi, Andreas
Scientists have explored how energetic particles such as solar energetic particles and cosmic rays move through a magnetized plasma such as the interplanetary and interstellar medium since more than five decades. From a theoretical point of view, this topic is difficult because the particles experience complicated interactions with turbulent magne…
SIMBIO-SYS: Scientific Cameras and Spectrometer for the BepiColombo Mission
Langevin, Y.; Poulet, F.; Jorda, L. +93 more
The SIMBIO-SYS (Spectrometer and Imaging for MPO BepiColombo Integrated Observatory SYStem) is a complex instrument suite part of the scientific payload of the Mercury Planetary Orbiter for the BepiColombo mission, the last of the cornerstone missions of the European Space Agency (ESA) Horizon + science program.
A Review of Possible Planetary Atmospheres in the TRAPPIST-1 System
Demory, Brice-Olivier; Leconte, Jérémy; Turbet, Martin +4 more
TRAPPIST-1 is a fantastic nearby (∼39.14 light years) planetary system made of at least seven transiting terrestrial-size, terrestrial-mass planets all receiving a moderate amount of irradiation. To date, this is the most observationally favourable system of potentially habitable planets known to exist. Since the announcement of the discovery of t…