Results 121 to 130 of about 18,502 (219)

Oxygen Isotope Constraints on the Importance of Photochemical Processing in Protoplanetary Disks

The Astronomical Journal
Observations have revealed evidence of photochemical processing in protoplanetary disks. This processing occurs in the photon-dominated layer, the optically thin regions of the disk high above the disk midplane. It remains unclear, however, how much this
Fred J. Ciesla, Eric Van Clepper, Jennifer Bergner, Edwin Bergin   +3 more
doaj   +1 more source

Survival of protoplanetary disks in Upper Scorpius from population synthesis models with external photoevaporation

Astronomy & Astrophysics
We present population synthesis models of viscous protoplanetary disks subject to mild external far-ultraviolet (FUV) radiation fields (FUV = 1–100 G0).
Ping Jingyi, Anania Rossella, Pinilla Paola, Vioque Miguel   +3 more
doaj   +1 more source

JWST Imaging of Edge-on Protoplanetary Disks. II. Appearance of Edge-on Disks with a Tilted Inner Region: Case Study of IRAS04302+2247

The Astrophysical Journal
We present James Webb Space Telescope imaging from 2 to 21 μ m of the edge-on protoplanetary disk around the embedded young star IRAS04302+2247. The structure of the source shows two reflection nebulae separated by a dark lane.
Marion Villenave, Karl R. Stapelfeldt, Gaspard Duchêne, François Ménard, Schuyler G. Wolff, Marshall D. Perrin, Christophe Pinte, Ryo Tazaki, Deborah L. Padgett   +8 more
doaj   +1 more source

Planet Formation Regulated by Galactic-scale Interstellar Turbulence

The Astrophysical Journal Letters
Planet formation occurs over a few Myr within protoplanetary disks of dust and gas, which are often assumed to evolve in isolation. However, extended gaseous structures have been uncovered around many protoplanetary disks, suggestive of late-stage infall
Andrew J. Winter, Myriam Benisty, Sean M. Andrews   +2 more
doaj   +1 more source

Insight into the Formation of β Pic b through the Composition of Its Parent Protoplanetary Disk as Revealed by the β Pic Moving Group Member HD 181327

The Astronomical Journal
It has been suggested that β Pic b has a supersolar metallicity and subsolar C/O ratio. Assuming solar carbon and oxygen abundances for the star β Pic and therefore the planet’s parent protoplanetary disk, β Pic b’s C/O ratio suggests that it formed via ...
Henrique Reggiani, Jhon Yana Galarza, Kevin C. Schlaufman, David K. Sing, Brian F. Healy, Andrew McWilliam, Joshua D. Lothringer, Laurent Pueyo   +7 more
doaj   +1 more source

Chemistry in Protoplanetary Disks

, 2010
14 pages, 2 figures, 2 tables, pre-final chapter to be published in Encyclopedia of Astrobiology by Gargaud, M.; Cernicharo, J.; Viso, M.; Cleaves II, H.J.; Pinti, D.; Amils, R.; Kobayashi, K.; Irvine, W.M. (Eds.), Springer, 2011 (ISBN: 978-3-642-11279-9)
openaire   +2 more sources

Enhanced Pebble Drift across Planet-opened Gaps in Windy Protoplanetary Disks

The Astrophysical Journal
When a giant planet forms in a protoplanetary disks, it carves a gap around its orbit separating the disk into two parts: an inner disk and an outer disk.
Lorraine Nicholson, Jaehan Bae
doaj   +1 more source

Asymmetric Temperature Variations In Protoplanetary Disks. I. Linear Theory, Corotating Spirals, and Ring Formation

The Astrophysical Journal
Protoplanetary disks can exhibit asymmetric temperature variations due to phenomena such as shadows cast by the inner disk or localized heating by young planets. We investigate the disk features induced by these asymmetric temperature variations. We find
Zhaohuan Zhu, Shangjia Zhang, Ted M. Johnson   +2 more
doaj   +1 more source

JWST MIRI MRS Images of Disk Winds, Water, and CO in an Edge-on Protoplanetary Disk

The Astrophysical Journal Letters
We present JWST MIRI MRS observations of the edge-on protoplanetary disk around the young subsolar-mass star Tau 042021, acquired as part of the Cycle 1 GO program “Mapping Inclined Disk Astrochemical Signatures.” These data resolve the mid-IR spatial ...
Nicole Arulanantham, M. K. McClure, Klaus Pontoppidan, Tracy L. Beck, J. A. Sturm, D. Harsono, A. C. A. Boogert, M. Cordiner, E. Dartois, M. N. Drozdovskaya, C. Espaillat, G. J. Melnick, J. A. Noble, M. E. Palumbo, Y. J. Pendleton, H. Terada, E. F. van Dishoeck   +16 more
doaj   +1 more source

Molecular Gas Tracers in Young and Old Protoplanetary Disks

The Astrophysical Journal
Molecular emission is used to investigate both the physical and chemical properties of protoplanetary disks. Therefore, to derive disk properties accurately, we need a thorough understanding of the behavior of the molecular probes upon which we rely ...
Dana E. Anderson, L. Ilsedore Cleeves, Geoffrey A. Blake, Chunhua Qi, Edwin A. Bergin, John M. Carpenter, Kamber R. Schwarz, Claire Thilenius, Ke Zhang   +8 more
doaj   +1 more source