Results 151 to 160 of about 71,588 (268)

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

Chemistry in Protoplanetary Disks

Reviews in Mineralogy and Geochemistry
Chapter 2 accepted for publication in the Reviews in Mineralogy and Geochemistry (RiMG) Volume 90 on "Exoplanets: Compositions, Mineralogy, and Evolution" edited by Natalie Hinkel, Keith Putirka, and Siyi Xu; 24 pages and 4 ...
openaire   +2 more sources

Physical Processes in Protoplanetary Disks [PDF]

, 2019
This review introduces physical processes in protoplanetary disks relevant to accretion and the initial stages of planet formation. After a brief overview of the observational context, I introduce the elementary theory of disk structure and evolution, review the gas-phase physics of angular momentum transport through turbulence and disk winds, and ...
openaire   +3 more sources

Magnetic fields in protoplanetary disks

, 2007
Magnetic fields likely play a key role in the dynamics and evolution of protoplanetary discs. They have the potential to efficiently transport angular momentum by MHD turbulence or via the magnetocentrifugal acceleration of outflows from the disk surface,
A. Johansen, A. Toomre, A.C. Quillen, A.E. Glassgold, B.T. Draine, C. Fendt, C. Hayashi, C.F. Gammie, C.P. Dullemond, D. Semenov, D. Semenov, E.H. Levy, E.T. Johnson, F.J. Ciesla, H. Nomura, J. Igea, J.E. Chambers, J.F. Chapman, L. Spitzer Jr., M. Ilgner, M. Wardle, M. Wardle, M. Wardle, M. Wardle, Mark Wardle, N. Calvet, N.J. Turner, R. Nishi, R.D. Blandford, R.H. Durisen, S. Fromang, S. Matsumura, S.A. Balbus, S.A. Balbus, S.A. Balbus, S.J. Weidenschilling, S.M. Andrews, T. Fleming, T. Sano, T. Sano, T. Sano, T. Umebayashi, T. Umebayashi, T.G. Cowling, Y. Kitamura   +44 more
core   +1 more source

Chondrules reveal large-scale outward transport of inner Solar System materials in the protoplanetary disk. [PDF]

Proc Natl Acad Sci U S A, 2020
Williams CD, Sanborn ME, Defouilloy C, Yin QZ, Kita NT, Ebel DS, Yamakawa A, Yamashita K.   +7 more
europepmc   +1 more source

The Magnetorotational Instability across the Dead Zone of Protoplanetary Disks [PDF]

, 2001
M. Reyes‐Ruiz
openalex   +1 more source

The Morphologies and Lifetimes of Transitional Protoplanetary Disks [PDF]

arXiv, 2010
I describe new constraints on the lifetimes and morphologies of transitional protoplanetary disks from observations of 1--10 Myr old stars with the \textit{Spitzer Space Telescope}. New Spitzer results clearly show evidence for two kinds of transitional disks and thus two main disk evolutionary pathways: disks which form an inner hole/gap and clear ...
arxiv  

Radial mixing in protoplanetary accretion disks [PDF]

, 2001
H. P. Gail
openalex   +1 more source

Constraints on the Gas-phase C/O Ratio of DR Tau's Outer Disk from CS, SO, and C2H Observations

The Astrophysical Journal
Millimeter wavelength observations of Class II protoplanetary disks often display strong emission from hydrocarbons and high CS/SO values, providing evidence that the gas-phase C/O ratio commonly exceeds 1 in their outer regions.
Jane Huang, Edwin A. Bergin, Romane Le Gal, Sean M. Andrews, Jaehan Bae, Luke Keyte, J. A. Sturm   +6 more
doaj   +1 more source

Three‐dimensional Simulations of a Planet Embedded in a Protoplanetary Disk [PDF]

, 2001
W. Kley, Gennaro D’Angelo, Thomas Henning   +2 more
openalex   +1 more source