Results 111 to 120 of about 71,588 (268)
Chemistry of Complex Organic Molecules in the V883 Ori Disk Revealed by ALMA Band 3 Observations
The Astronomical JournalComplex 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 +5 more
doaj +1 more source
The Formation of Protoplanetary Disks through Pre-Main Sequence Bondi-Hoyle Accretion [PDF]
Protoplanetary disks are traditionally described as finite mass reservoirs left over by the gravitational collapse of the protostellar core, a view that strongly constrains both disk evolution and planet formation models. We propose a different scenario where protoplanetary disks of pre-main sequence stars are primarily assembled by Bondi-Hoyle ...
arxiv +1 more source
Protoplanetary Disk Heating and Evolution Driven by the Spiral Density Waves [PDF]
, 2016 High-resolution imaging of some protoplanetary disks in scattered light reveals presence of the global spiral arms of significant amplitude, likely excited by massive planets or stellar companions. Assuming that these arms are density waves, evolving into spiral shocks, we assess their effect on the thermodynamics, accretion, and global evolution of ...
arxiv +1 more source
Meteoritics &Planetary Science, Volume 59, Issue 12, Page 3282-3304, December 2024.Abstract Understanding the material transport and mixing processes in the Solar protoplanetary disk provides important constraints on the origin of chemical and isotopic diversities of our planets. The limited extent of radial transport and mixing between the inner and outer Solar System has been suggested based on a fundamental isotopic dichotomy ...
Kohei Fukuda +7 more
wiley +1 more source
The Astronomical JournalScattered light imaging of protoplanetary disks provides key insights on the geometry and dust properties in the disk surface. Here, we present James Webb Space Telescope (JWST) 2–21 μ m images of a 1000 au radius edge-on protoplanetary disk surrounding ...
Gaspard Duchêne +8 more
doaj +1 more source
Theory of Disk Accretion onto Magnetic Stars
EPJ Web of Conferences, 2014 Disk accretion onto magnetic stars occurs in a variety of systems, including accreting neutron stars (with both high and low magnetic fields), white dwarfs, and protostars.
Lai Dong
doaj +1 more source
Astronomische Nachrichten, Volume 345, Issue 8, October 2024.Abstract Astrophysical accretion discs that carry a significant mass compared with their central object are subject to the effect of self‐gravity. In the context of circumstellar discs, this can, for instance, cause fragmentation of the disc gas, and—under suitable conditions—lead to the direct formation of gas‐giant planets.
Oliver Gressel, Udo Ziegler
wiley +1 more source
Carbon In Protoplanetary Disks
, 2018 The carbon and oxygen content of the solids in protoplanetary disks plays an important role in defining the composition of giant planet atmospheres. I will discuss what we know about the distribution of carbonaceous material in the solar system and discuss potential processes influencing its radial distribution. I will also present modeling results for
openaire +4 more sources
Resonant Relaxation in Protoplanetary Disks [PDF]
The Astronomical Journal, 1998 19 pages, 1 figure, LaTeX, submitted to ...
openaire +3 more sources
Natural Sciences, Volume 4, Issue 4, October 2024.Large free aromatic species, with up to 61 carbon atoms, were detected in grains of the Ryugu carbonaceous asteroid using ultra‐sensitive two‐step laser mass spectrometry. This discovery confirms the presence of large polycyclic aromatic hydrocarbons in the interstellar medium and provides new information on the formation and evolution of organic ...
Hassan Sabbah +3 more
wiley +1 more source