Results 1 to 10 of about 16,494 (193)

Photoprocesses in protoplanetary disks [PDF]

Faraday Discussions, 2006
Circumstellar disks are exposed to intense ultraviolet radiation from the young star. In the inner disks, the UV radiation can be enhanced by more than seven orders of magnitude compared with the average interstellar field, resulting in a physical and ...
Aikawa, Augereau, Bastiaan Jonkheid, Bergin, Brittain, Buenker, Calvet, Chiang, Clampin, Connors, D?Alessio, Dent, Draine, Dunning, Dutrey, Ewine F. van Dishoeck, Feigelson, Geers et al., Gorti, Greaves, Gredel, Guest, Habing, Hauschildt, Herbig, Hollenbach, Honjou, Huebner, Jonkheid, Jonkheid, Kamp, Kamp, Kamp, Kessler-Silacci, Kirby, Kirby, Koch, Koch, Lavendy, Lee, Lee, Lee, Lee, Lee, Lepp, Li, Lyons, Marc C. van Hemert, Markwick, Min, Muzerolle, Nee, Nee, Ogawa, Okabe, Pouilly, R?melt, Roberge, Roberge, Shen, Shih, Spaans, St?uber, St?uber, Suto, Suto, Suto, Suto, Sylvester, Theodorakopoulos, Thi, van Boekel, van Dishoeck, van Dishoeck, van Dishoeck, van Dishoeck, van Dishoeck, van Zadelhoff, Watanabe, Weidenschilling, Willacy, Yoshino   +81 more
core   +3 more sources

Silica in Protoplanetary Disks [PDF]

The Astrophysical Journal, 2008
Mid-infrared spectra of a few T Tauri stars (TTS) taken with the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope show prominent narrow emission features indicating silica (crystalline silicon dioxide).
A. Li, A. R. Basu, Alexander, Armus, B. A. Sargent, Barkume, Barsony, Benzerara, Binns, Bohren, Bouvier, Bowen, Bowen, Brearley, C. J. Bohac, C. Tayrien, Calvet, Calvet, Chen, Chiar, Cohen, D'Alessio, D'Alessio, D. M. Watson, de Pater, de Zeeuw, Dodd, Dorschner, E. Furlan, Edgar, Emery, Fabian, Furlan, G. C. Sloan, Grün, Hanner, Harker, Harker, Heaney, Hemley, Henning, Herbig, Honda, Houck, J. D. Green, Jaeger, K. H. Kim, Kamp, Kastner, Kemper, Kimura, Klein, Koike, Li, Li, Luhman, Luhman, M. K. McClure, Marshall, Metchev, Mikouchi, Mutschke, Norton, P. Manoj, Palik, Pascucci, Pilipp, Plyusnina, Posch, Prato, Preibisch, Reipurth, Rietmeijer, Rietmeijer, Rietmeijer, Sargent, Schaefer, Silverstone, Tuttle, Uchida, W. J. Forrest, Werner, Wilking   +82 more
core   +2 more sources

Volatiles in protoplanetary disks [PDF]

, 2014
Volatiles are compounds with low sublimation temperatures, and they make up most of the condensible mass in typical planet-forming environments. They consist of relatively small, often hydrogenated, molecules based on the abundant elements carbon ...
Bergin, Edwin A., Brittain, Sean, Marty, Bernard, Mousis, Olvier, Oberg, Karin L., Pontoppidan, Klaus M., Salyk, Colette   +6 more
core   +4 more sources

Chemistry in Protoplanetary Disks [PDF]

Chemical Reviews, 2013
This comprehensive review summarizes our current understanding of the evolution of gas, solids and molecular ices in protoplanetary disks. Key findings related to disk physics and chemistry, both observationally and theoretically, are highlighted.
Henning, Thomas, Semenov, Dmitry
exaly   +6 more sources

Vortex migration in protoplanetary disks [PDF]

The Astrophysical Journal, 2010
We consider the radial migration of vortices in two-dimensional isothermal gaseous disks. We find that a vortex core, orbiting at the local gas velocity, induces velocity perturbations that propagate away from the vortex as density waves.
Abramowitz, Barge, Barranco, Bryden, Geoffroy Lesur, Godon, Goodman, John C. B. Papaloizou, Johnson, Johnson, Klahr, Koller, Lovelace, Papaloizou, Petersen, Petersen, Sijme-Jan Paardekooper, Tanaka, Ward, Weidenschilling   +19 more
core   +8 more sources

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 ...
Waters L.B.F.M.
doaj   +2 more sources

Herschel evidence for disk flattening or gas depletion in transitional disks [PDF]

, 2014
Transitional disks are protoplanetary disks characterized by reduced near- and mid-infrared emission with respect to full disks. This characteristic spectral energy distribution indicates the presence of an optically thin inner cavity within the dust ...
Andrews, S., Dent, W. R. F., Espaillat, C., Kamp, I., Keane, J. T., Meeus, G., Pascucci, I., Thi, W. -F., Woitke, P.   +8 more
core   +13 more sources

Finding Substructures in Protostellar Disks in Ophiuchus

The Astronomical Journal, 2023
High-resolution, millimeter observations of disks at the protoplanetary stage reveal substructures such as gaps, rings, arcs, spirals, and cavities. While many protoplanetary disks host such substructures, only a few at the younger protostellar stage ...
Arnaud Michel, Sarah I. Sadavoy, Patrick D. Sheehan, Leslie W. Looney, Erin G. Cox, John J. Tobin, Nienke van der Marel, Dominique M. Segura-Cox   +7 more
doaj   +1 more source

Protoplanetary Disk Chemistry

Annual Review of Astronomy and Astrophysics, 2023
Planets form in disks of gas and dust around young stars. The disk molecular reservoirs and their chemical evolution affect all aspects of planet formation, from the coagulation of dust grains into pebbles to the elemental and molecular compositions of the mature planet.
Öberg, Karin I., Facchini, Stefano, Anderson, Dana E.   +2 more
openaire   +2 more sources

A numerical approach to model chemistry of complex organic molecules in a protoplanetary disk

Open Astronomy, 2022
Multiphase astrochemical modeling presents a numerical challenge especially for the simulation of objects with the wide range of physical parameters such as protoplanetary disks.
Kiskin Mikhail Yu., Vasyunin Anton I., Akimkin Vitaly V.   +2 more
doaj   +1 more source