Results 81 to 90 of about 73,704 (164)

Deciphering the “Missing Xenon Paradox” in Celestial Bodies: A Multifaceted Perspective Toward Demystifying This Enigma

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Xenon (Xe) is a heavy noble gas with intriguing chemical properties, such as having several stable isotopes and the ability to form compounds under extreme conditions. Despite the predictions based on cosmochemical models that suggest xenon should be relatively abundant in planetary reservoirs, empirical data indicate a significant depletion ...
Avinash Kumar Both, Avradip Ghosh, Chin Li Cheung   +2 more
wiley   +1 more source

Modeling Gas Distribution in Protoplanetary Accretion Disks [PDF]

, 2010
Protoplanetary accretion disks are disks of dust and gas which surround and feed material onto a forming star in the earliest stages of its evolution. One of the most useful methods for studying these disks is near infrared spectroscopy of rovibrational ...
Lewis, Josiah, Kronberg, Martin, Brittain, Sean D   +2 more
core   +1 more source

Magnetohydrodynamical Opening of Dust Traps in Protoplanetary Disks

The Astrophysical Journal
Observed ring-like structures in protoplanetary disks are often interpreted as local pressure maxima, which induce efficient dust concentration. We revisit this paradigm considering the effect of the large-scale magnetic field stresses on the gas ...
Sergey Khaibrakhmanov, Vitaly Akimkin
doaj   +1 more source

Just a Phase? Weakening Vertical Shear Instability Explains Class II Disk Morphologies: Simulations with Dust Coagulation, Sedimentation, Thermal Relaxation, and Backreaction

The Astrophysical Journal Letters
The vertical shear instability (VSI) is known to create turbulence and strong vertical mixing in protoplanetary disks if thermal relaxation is sufficiently fast.
Thomas Pfeil, Alexandros Ziampras, Shangjia Zhang, Philip J. Armitage, Yan-Fei Jiang   +4 more
doaj   +1 more source

The diversification and dissipation of protoplanetary disks

Astronomy & Astrophysics
Protoplanetary disk evolution exhibits trends with stellar mass, but also diversity of structure, and lifetime, with implications for planet formation and demographics. We show how varied outcomes can result from evolving structures in the inner disk that attenuate stellar soft X-rays that otherwise drive photoevaporation in the outer disk.
Eric Gaidos, Lukas Gehrig, Manuel Güdel
openaire   +2 more sources

Sizing up protoplanetary disks [PDF]

, 2020
This thesis focuses on protoplanetary disks: flattened structures of gas and dust around young stars in which planets are expected to form and grow. Physical-chemical models that compute the thermal structure and chemical composition of protoplanetary ...
Trapman, L.
core  

Molecular Line Observations of Protoplanetary Disks

, 2013
We summarize in this poster a long-term study of the chemistry as a powerful tool to constrain the protoplanetary disk physics.
Henning, Thomas, Guilloteau, S., Ohashi, Nagayoshi, Piétu, Vincent, Chapillon, E., Dutrey, Anne, Boehler, Y., Wakelam, Valentine, Hersant, F., Gueth, Frédéric, Schreyer, Katharina, Parise, Bérengère, Semenov, Dimitry, Launhardt, Ralf, Guélin, Michel   +14 more
core   +4 more sources

Puffed-up Edges of Planet-opened Gaps in Protoplanetary Disks. II. The Role of the Planet’s Orbital Eccentricity

The Astrophysical Journal
Eccentric planets constitute a large population of the known exoplanets and may drive significant substructures in protoplanetary disks through planet–disk interactions if their eccentricities are excited early in the planet formation process.
Jiaqing Bi, Min-Kai Lin
doaj   +1 more source

Light Echoes of Time-resolved Flares and Application to Kepler Data

The Open Journal of Astrophysics
Light echoes of stellar flares provide an intriguing option for exploring protoplanetary disks in young stellar systems. Previous work on light echoes of circumstellar disks made use of delta-function flares for modeling.
Austin King, Benjamin C. Bromley
doaj   +1 more source

Unlocking a Bayesian View on Protoplanetary Disks [PDF]

Protoplanetary disks are a natural by-product of the star-formation process. These disks of dust and gas orbit the emerging star and are the birthplace of planets.
Käufer, Till
core   +1 more source