The role of density perturbation on planet formation by pebble accretion
![Thumbnail](/xmlui/bitstream/handle/123456789/2579/The%20role%20of%20density%20perturbation%20on%20planet%20formation%20by%20pebble%20accretion.pdf.jpg?sequence=4&isAllowed=y)
View/ Open
Date
2022Author
Andama, G.
Ndugu, N.
Anguma, S. K.
Jurua, E.
Metadata
Show full item recordAbstract
Protoplanetary discs exhibit a diversity of gaps and rings of dust material, believed to be a manifestation of pressure maxima commonly associated with an ongoing planet formation and several other physical processes. Hydrodynamic disc simulations further suggest that multiple dust ring-like structures may be ubiquitous in discs. In the recent past, it has been shown that dust rings may provide a suitable avenue for planet formation. We study how a globally perturbed disc affects dust evolution and core growth by pebble accretion. We performed global disc simulations featuring a Gaussian pressure profile, in tandem with global perturbations of the gas density, mimicking wave-like structures, and simulated planetary core formation at pressure minima and maxima. With Gaussian pressure profiles, grains in the inside disc regions were extremely depleted in the first 0.1 Myr of disc lifetime. The global pressure bumps confined dust material for several million years, depending on the strength of perturbations. A variety of cores formed in bumpy discs, with massive cores at locations where core growth was not feasible in a smooth disc, and small cores at locations where massive cores could form in a smooth disc. We conclude that pressure bumps generated by a planet and/or other physical phenomena can completely thwart planet formation from the inside parts of the disc. While inner disc parts are most favorable for pebble accretion in a smooth disc, multiple wave-like pressure bumps can promote rapid planet formation by pebble accretion in broad areas of the disc
Collections
- Research Articles [91]
Related items
Showing items related by title, author, creator and subject.
-
Planetary core formation via multispecies pebble accretion
Andama, G; Ndugu, N; Anguma, S. K; Jurua, E (Monthly Notices of the Royal Astronomical Society, 2021)In the general classical picture of pebble-based core growth, planetary cores grow by accretion of single pebble species. The growing planet may reach the so-called pebble isolation mass, at which it induces a pressure ... -
The flare-activity of 2MASS J16111534–1757214 in the upper Scorpius association
Guenther, E. W; Wockel, D; Chaturvedi, P; Kumar, V; Srivastava, M. K; Muheki, P (Monthly Notices of the Royal Astronomical Society, 2021)Flares are known to play an important role for the evolution of the atmospheres of young planets. In order to understand the evolution of planets, it is thus important to study the flare-activity of young stars. This is ... -
Are the observed gaps in protoplanetary discs caused by growing planets?
Ndugu, N.; Bitsch, B.; . Jurua, E (Oxford University Press on behalf of the Royal Astronomical Society, 2019-06-25)ABSTRACT Recent detailed observations of protoplanetary discs revealed a lot of substructures that are mostly ring like. One interpretation is that these rings are caused by growing planets. These potential planets are ...