Protoplanetary disks are vital objects in star and planet formation, possessing all the material which may form a planetary system orbiting the new star. We investigate the synthesis of complex […]
astro-ph.EP]
Posted inIcy Worlds
New insights on Titan's interior from its obliquity
We constructed a 6-degrees of freedom rotational model of Titan as a 3-layer body consisting of a rigid core, a fluid global ocean, and a floating ice shell. The ice […]
Posted inBiosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones
A Low-order Model of Water Vapor, Clouds, and Thermal Emission for Tidally Locked Terrestrial Planets
We developed an idealized two-column model to investigate the climate of tidally locked terrestrial planets with Earth-like atmospheres in the habitable zone of M-dwarf stars. The model is able to […]
Posted inAstrochemistry, Exoplanets, -moons, -comets, Habitable Zones
Abiotic oxygen-dominated atmospheres on terrestrial habitable zone planets
Detection of life on other planets requires identification of biosignatures, i.e., observable planetary properties that robustly indicate the presence of a biosphere. One of the most widely accepted biosignatures for […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Plant Biology
Photosynthetic Potential of Planets in 3:2 Spin Orbit Resonances
Photosynthetic life requires sufficient photosynthetically active radiation (PAR) to metabolise. On Earth, plant behaviour, physiology and metabolism are sculpted around the night-day cycle by an endogenous biological circadian clock. The […]
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones
Earth as an Extrasolar Transiting Planet: Detection of Water Vapor & Biogenic Species
The atmospheric composition of transiting exoplanets can be characterized during transit by spectroscopy. or an Earth twin, models predict that oxygen and ozone biogenic gases should be detectable, as well […]
Posted inExoplanets, -moons, -comets, Habitable Zones
Migration of Earth-size planets in 3D Radiative Discs
In this paper, we address the migration of small mass planets in 3D radiative disks. Indeed, migration of small planets is known to be too fast inwards in locally isothermal […]
Posted inExoplanets, -moons, -comets, Habitable Zones
Possibilities of Life Around Alpha Centauri B
We make a preliminary assessment on the habitability of potential rocky exoplanets around Alpha Centauri B. We use several indexes: the Earth Similarity Index, a mathematical model for photosynthesis, and […]
Posted inExoplanets, -moons, -comets, Habitable Zones
Dynamical Test for Terrestrial Planets in Habitable Zone of HD 204313
With improvements in exoplanet detection techniques, the number of multiple planet systems discovered is increasing, while the detection of potentially habitable Earth-mass planets remains complicated and thus requires new search […]
Posted inAstrochemistry, Meteorites & Asteroids, Panspermia
Nature's Starships: Observed Abundances and Relative Frequencies of Amino Acids in Meteorites
The class of meteorites called carbonaceous chondrites are examples of material from the solar system which have been relatively unchanged from the time of their initial formation. These meteorites have […]