Results 61 to 70 of about 18,502 (219)

Dust in protoplanetary disks: observations [PDF]

EPJ Web of Conferences, 2015
Solid particles, usually referred to as dust, are a crucial component of interstellar matter and of planet forming disks surrounding young stars. Despite the relatively small mass fraction of ≈1% (in the solar neighborhood of our galaxy; this number may differ substantially in other galaxies) that interstellar grains represent of the total mass budget ...
openaire   +2 more sources

Disk2Planet: A Robust and Automated Machine Learning Tool for Parameter Inference in Disk–Planet Systems

The Astrophysical Journal
We introduce Disk2Planet, a machine-learning-based tool to infer key parameters in disk–planet systems from observed protoplanetary disk structures. Disk2Planet takes as input the disk structures in the form of 2D density and velocity maps, and outputs ...
Shunyuan Mao, Ruobing Dong, Kwang Moo Yi, Lu Lu, Sifan Wang, Paris Perdikaris   +5 more
doaj   +1 more source

Kinematic Evidence of an Embedded Protoplanet in HD 142666 Identified by Machine Learning

The Astrophysical Journal, 2023
Observations of protoplanetary disks have shown that forming exoplanets leave characteristic imprints on the gas and dust of the disk. In the gas, these forming exoplanets cause deviations from Keplerian motion, which can be detected through molecular ...
J. P. Terry, C. Hall, S. Abreau, S. Gleyzer   +3 more
doaj   +1 more source

A Search for Mid-Infrared Molecular Hydrogen Emission from Protoplanetary Disks [PDF]

, 2007
We observed the Herbig Ae/Be stars UX Ori, HD 34282, HD 100453, HD 101412, HD 104237 and HD 142666, and the T Tauri star HD 319139 and searched for H2 0-0 S(2) emission at 12.278 micron and H2 0-0 S(1) emission at 17.035 micron with VISIR, ESO-VLT's high-
A. Carmona, Acke, Acke, Beckwith, Bitner, Boss, C. P. Dullemond, Chen, Chiang, Chiang, Cohen, de Zeeuw, Dent, Dullemond, Dullemond, Dunkin, Glassgold, Haisch, Haisch, Henning, Hollenbach, J. Bouwman, Jensen, Jonkheid, Kamp, L. B. F. M. Waters, Lagage, Lahuis, Laor, M. E. van den Ancker, M. Goto, Martin-Zaïdi, Meeus, Nomura, Nomura, Palla, Pascucci, Piétu, Pollack, Richter, Sako, Sheret, Sicilia-Aguilar, Stempels, Takahashi, Th. Henning, Thi, van den Ancker, W. F. Thi, Wolniewicz, Ya. Pavlyuchenkov   +50 more
core   +4 more sources

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

Formation, Orbital and Internal Evolutions of Young Planetary Systems [PDF]

, 2016
The growing body of observational data on extrasolar planets and protoplanetary disks has stimulated intense research on planet formation and evolution in the past few years.
Bai, Xuening, Baruteau, Clément, Mollière, Paul, Mordasini, Christoph   +3 more
core   +4 more sources

Small‐scale elemental abundance variations in Ryugu particles from touchdown 1

Meteoritics &Planetary Science, Volume 61, Issue 4, Page 580-599, April 2026.
Abstract Ryugu materials closely resemble CI chondrites' mineralogical, chemical, and isotopic compositions; yet minor but resolvable differences in certain elemental abundances are evident. In this study, the bulk chemical compositions of eight individual Ryugu particles (1.5–4.3 mg) from the first touchdown site (TD1) were determined using triple ...
Karina López García, Tetsuya Yokoyama, Ikshu Gautam, Makiko K. Haba, Tsuyoshi Iizuka, Nao Nakanishi, Ryota Fukai   +6 more
wiley   +1 more source

Gap Formation in the Dust Layer of 3D Protoplanetary Disks

, 2007
We numerically model the evolution of dust in a protoplanetary disk using a two-phase (gas+dust) Smoothed Particle Hydrodynamics (SPH) code, which is non-self-gravitating and locally isothermal. The code follows the three dimensional distribution of dust
A. Crida, A.J. Weinberger, D.N.C. Lin, G. Bryden, G. Schneider, H. Beust, J. Papaloizou, J.-F. Gonzalez, L. Barrière-Fouchet, L. Fouchet, M. Val-Borro de, N. Calvet, N.I. Shakura, P. Varnière, R. Alexander, S. T. Maddison, S. Wolf, S.-J. Paardekooper, V. Piétu, W. Kley, W.K.M. Rice, W.K.M. Rice   +21 more
core   +2 more sources

Petrography and mineral chemistry of Northeast Africa 053—A remnant of Martian crystal mush

Meteoritics &Planetary Science, Volume 61, Issue 4, Page 621-643, April 2026.
Abstract In Earth's igneous systems, crystal mushes, crystal‐rich frameworks permeated by silicate melt, represent a common and fundamental stage in the evolution of magma bodies. However, whether crystal mushes occur within Martian igneous systems and play a comparable role is unknown. Here, we present a comprehensive petrography and mineral chemistry
Xhonatan Shehaj, Eleonora Ammannito, Giovanni Pratesi   +2 more
wiley   +1 more source

Discovery of Jet–Bubble–Disk Interaction: Jet Feedback on a Protoplanetary Disk Via an Expanding Bubble in WSB 52

The Astrophysical Journal
While stellar jets and outflows are fueled by accretion from disks, their direct influence on disks remain unexplored. Here, we revisit Atacama Large Millimeter/submillimeter Array observations of ^12 CO ( J  = 2–1) line emission for the young stellar ...
Masataka Aizawa, Ryuta Orihara, Munetake Momose   +2 more
doaj   +1 more source