[astro-ph.EP] Protoplanetary discs emerging from collapsing molecular clouds are capable of forming planetesimals at the water snowline during both the cloud collapse and Class II disc phases; such a scenario […]
water snowline
![Planet growth and migration tracks for the formation of WASP-19 b starting from different initial orbital locations. Solid parts of the tracks indicate the pebble-accretion phase before the planet reached pebble isolation mass, while dotted parts indicate the subsequent gas-accretion phase. Different symbols indicate different disc viscosities (α = 10−3 , 5 × 10−4 , and 10−4 ). The colour of each track represents the resulting atmospheric C/O ratio of the planet. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/The-majority.png?resize=1200%2C720&ssl=1)
Posted inExoplanets, -moons, -comets
The Majority Of Hot Jupiters Formed Beyond The Water Ice Line
[astro-ph.EP] Atmospheric compositions of giant exoplanets can retain information about their formation environments, as volatile species condense at different temperatures in protoplanetary discs.
Posted inAriel Mission, Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Missions & Hardware, Status Report, Stellar Cartography
The Origins Of Planets For ArieL (OPAL) Key Science Project: The End-to-end Planet Formation Campaign For The ESA Space Mission Ariel
The growing body of atmospheric observations of exoplanets from space and ground-based facilities showcases how the great diversity of the planetary population is not limited to their physical properties but […]
Posted inAstrochemistry, Astrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Interstellar, Press Release
Zooming Into The Water Snowline: High Resolution Water Observations of the HL Tau disk
Water is one of the central molecules for the formation and habitability of planets. In particular, the region where water freezes-out, the water snowline, could be a favorable location to […]
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Habitable Zones, Interstellar, Press Release
A Submillimeter Survey Of CS Excitation In Protoplanetary Disks: Evidence Of X-ray-Driven Sulfur Chemistry
The sulfur chemistry in protoplanetary disks influences the properties of nascent planets, including potential habitability.
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Icy Worlds, Imaging & Spectroscopy, Status Report
Dust And Water In V883 Ori: Relics Of A Retreating Snowline
V883 Ori is an FU-Orionis-type outburst system characterized by a shoulder at 50-70 au in its ALMA band 6 and 7 intensity profiles.
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Status Report
Water Snowline in Young Stellar Objects with Various Density Structures Using Radiative Transfer Models
Tracing the water snowline in low-mass young stellar objects (YSOs) is important because dust grain growth is promoted and the chemical composition varies at the water snowline, which influences planet […]
Posted inAstrochemistry, Astronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Understanding JWST Water Spectra: What Can Thermochemical Models Tell Us About The (Cold) Water In Protoplanetary Disks?
Rotational H2O spectra as observed with JWST/MIRI provide a good probe of the temperature and column density structure of the inner disk. H2O emission can also be influenced by dynamical […]
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Icy Worlds, Status Report
Cosmic Cascades: How Disk Substructure Regulates The Flow Of Water To Inner Planetary Systems
The influx of icy pebbles to the inner regions of protoplanetary disks constitutes a fundamental ingredient in most planet formation theories.
Posted inAstrochemistry, Astrogeology, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Gas Giants, Icy Worlds, Status Report
Linking Planet Formation To Exoplanet Characteristics: C/O As A Diagnostic Of Planet Formation
Gas-giant exoplanets are test cases for theories of planet formation as their atmospheres are proposed to carry signatures of their formation within the protoplanetary disk.