Results 71 to 80 of about 398,118 (263)

Shadows, gaps, and ring-like structures in protoplanetary disks [PDF]

, 2011
We study the structure of passively heated disks around T Tauri and Herbig Ae stars, and present a vectorized Monte Carlo dust radiative transfer model of protoplanetary disks. The vectorization provides a speed up factor of 100 when compared to a scalar
Acke, Alexander, Alexander, Asplund, Beckwith, Bertout, Bjorkman, Bouwman, Brown, Brown, Calvet, Charnoz, Chiang, Cieza, Draine, Draine, Dullemond, Dullemond, Dullemond, Dullemond, Dullemond, Dullemond, D’Alessio, Edgar, Eisner, Espaillat, F. Heymann, Fitzpatrick, Fleck, Fukagawa, Furlan, Furlan, Gail, Hayashi, Huelamo, Ida, Isella, Ivezic, Kalas, Kama, Kemper, Kenyon, Kessler-Silacci, Klahr, Krijt, Krügel, Lagrange, Lommen, Lommen, Lubow, Lucy, Malfait, Mayama, McCaughrean, Millan-Gabet, Min, Min, Miroshnichenko, Mizuno, Mulders, Muzerolle, Najita, Najita, Natta, Natta, Nomura, Oliveira, Olofsson, Ozernoy, Pascucci, Pinte, Pinte, Pinte, Pontoppidan, Pontoppidan, R. Siebenmorgen, Ratzka, Ricci, Robitaille, Robitaille, Schegerer, Schegerer, Schisano, Siebenmorgen, Siebenmorgen, Sterzik, Strom, Testi, Thalmann, Tielens, Tutukov, van Boekel, van den Ancker, Verhoeff, Vinkovic, Visser, Voshchinikov, Walker, Waters, Watson, Watson, Whitney, Witt, Wolf, Zubko   +104 more
core   +2 more sources

Atomistic Modeling of Methyl Formate and Glycolaldehyde Formation on Interstellar Dirty Ice Mantles via a “Radical + Ice” Mechanism

ChemPlusChem, Volume 90, Issue 11, November 10, 2025.
The presence of interstellar complex organic molecules (COMs) has been baffling astrochemists for a long time. Methyl formate and glycolaldehyde are widely detected but their abundances mismatch kinetic astrochemical model predictions. Here, the formation of these two COMs is characterized onto a mixed ice surface, highlighting the importance of ...
Jessica Perrero, Stefano Pantaleone, Piero Ugliengo, Albert Rimola   +3 more
wiley   +1 more source

Development of 1D Non-ideal MHD Simulation Code Towards understanding Long-term Evolution of Protoplanetary Disk

The Astrophysical Journal
We developed a one-dimensional magnetohydrodynamic (MHD) simulation code to investigate the long-term evolution of protoplanetary disks with low computational cost.
Yudai Kobayashi, Daisuke Takaishi, Yusuke Tsukamoto, Shantanu Basu   +3 more
doaj   +1 more source

Heating and cooling processes in disks*

EPJ Web of Conferences, 2015
This chapter summarises current theoretical concepts and methods to determine the gas temperature structure in protoplanetary disks by balancing all relevant heating and cooling rates.
Woitke Peter
doaj   +1 more source

Physicochemical Constraints on the Abiotic Polymerization of Nucleotides Into RNA

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 11, November 2025.
Abstract One of the key steps in the origin of life is the polymerization of nucleotides into nucleic acids like RNA. We have quantified the energetic impact of temperature, pressure, and composition on the polymerization of nucleotides into RNA using the Gibbs function. These Gibbs energies have been used to calculate the probability that a nucleotide
D. E. LaRowe, J. M. Dick
wiley   +1 more source

LAMOST Reveals Long-lived Protoplanetary Disks

The Astronomical Journal
While both observations and theories demonstrate that protoplanetary disks are not expected to live much longer than ∼10 Myr, several examples of prolonged disks have been observed in the past.
Xiao-Long Wang, Min Fang, Yao Liu, Miao-Miao Zhang, Wen-Yuan Cui   +4 more
doaj   +1 more source

The Structure and Evolution of Protoplanetary Disks: an infrared and submillimeter view

, 2015
Circumstellar disks are the sites of planet formation, and the very high incidence of extrasolar planets implies that most of them actually form planetary systems.
Cieza, Lucas A.
core   +1 more source

Unlocking CO Depletion in Protoplanetary Disks. I. The Warm Molecular Layer [PDF]

, 2018
CO is commonly used as a tracer of the total gas mass in both the interstellar medium and in protoplanetary disks. Recently, there has been much debate about the utility of CO as a mass tracer in disks. Observations of CO in protoplanetary disks reveal a
K. Schwarz, E. Bergin, L. Cleeves, Ke Zhang, K. Oberg, G. Blake, Dana Anderson University of Michigan, H. C. F. Astrophysics, C. I. O. Technology.   +8 more
semanticscholar   +1 more source

Accumulation of Dust on a Surface and the Subsequent Formation of Compact Aggregate Piles

Journal of Geophysical Research: Planets, Volume 130, Issue 10, October 2025.
Abstract Dust aggregation is a prominent topic in space physics, yet the accumulation of dust on surfaces in airless environments remains poorly understood. It is commonly assumed that, during the initial stages of dust deposition, particles spread uniformly to form a monolayer.
G. Griffin, J. Martinez, P. Adamson, L. Matthews, T. W. Hyde   +4 more
wiley   +1 more source

Chemistry of Complex Organic Molecules in the V883 Ori Disk Revealed by ALMA Band 3 Observations

The Astronomical Journal
Complex organic molecules (COMs) in protoplanetary disks are key to understanding the origin of volatiles in comets in our solar system, yet the chemistry of COMs in protoplanetary disks remains poorly understood.
Yoshihide Yamato, Shota Notsu, Yuri Aikawa, Yuki Okoda, Hideko Nomura, Nami Sakai   +5 more
doaj   +1 more source