Dust back reaction on gas around planets modifies the cold thermal torque

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510770" target="_blank" >RIV/00216208:11320/25:10510770 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=YZRaoghH6j" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=YZRaoghH6j</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202452971" target="_blank" >10.1051/0004-6361/202452971</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dust back reaction on gas around planets modifies the cold thermal torque

Popis výsledku v původním jazyce

Context. A nascent planet in a gas disk experiences radial migration due to the different torques that act on it (e.g., Lindblad and corotation torques). It has recently been shown that the torques produced by the gas and dust density variations around a non-accreting low-mass planet, the so-called cold thermal and dust streaming torques, can surpass each of the other torque components. Aims. We investigate how the total torque acting on the planet is affected by the presence of dust grains and their aerodynamic back reaction on gas, while taking into account the cold thermal torque produced by thermal diffusion in the gas component. Methods. We performed high-resolution local and global three-dimensional two-fluid simulations within the pressureless-fluid dust approximation using the Fargo3D code. We explored the influence of different dust species parameterized by the Stokes number, focusing on non-accreting protoplanets with masses from one-third the mass of Mars to one Earth mass. Results. The dust feedback has a substantial impact on the asymmetry of the cold thermal lobes (which produce the cold thermal torque). However, the total torque is dominated by the dust torque when St &gt; 10(-2). The dust torque becomes more negative over time due to the formation of dust lobes that resemble the cold thermal lobes that form in the gas component. Therefore, the dust streaming torque prevails over the cold thermal torque. On the other hand, when St = 10(-2), the dust streaming torque is negligible and thus, the total torque on the planet comes from the gaseous component of the disk. Conclusions. Our results suggest that a planet embedded in a gas-dust disk may experience stagnant migration or inward runaway migration in regions of the protoplanetary disk where the dust is not fully coupled to the gas. However, this behavior could change in regions with strong dust-gas coupling or in the inner transition region of the disk, where the cold thermal torque may become relevant.

Název v anglickém jazyce

Dust back reaction on gas around planets modifies the cold thermal torque

Popis výsledku anglicky

Context. A nascent planet in a gas disk experiences radial migration due to the different torques that act on it (e.g., Lindblad and corotation torques). It has recently been shown that the torques produced by the gas and dust density variations around a non-accreting low-mass planet, the so-called cold thermal and dust streaming torques, can surpass each of the other torque components. Aims. We investigate how the total torque acting on the planet is affected by the presence of dust grains and their aerodynamic back reaction on gas, while taking into account the cold thermal torque produced by thermal diffusion in the gas component. Methods. We performed high-resolution local and global three-dimensional two-fluid simulations within the pressureless-fluid dust approximation using the Fargo3D code. We explored the influence of different dust species parameterized by the Stokes number, focusing on non-accreting protoplanets with masses from one-third the mass of Mars to one Earth mass. Results. The dust feedback has a substantial impact on the asymmetry of the cold thermal lobes (which produce the cold thermal torque). However, the total torque is dominated by the dust torque when St &gt; 10(-2). The dust torque becomes more negative over time due to the formation of dust lobes that resemble the cold thermal lobes that form in the gas component. Therefore, the dust streaming torque prevails over the cold thermal torque. On the other hand, when St = 10(-2), the dust streaming torque is negligible and thus, the total torque on the planet comes from the gaseous component of the disk. Conclusions. Our results suggest that a planet embedded in a gas-dust disk may experience stagnant migration or inward runaway migration in regions of the protoplanetary disk where the dust is not fully coupled to the gas. However, this behavior could change in regions with strong dust-gas coupling or in the inner transition region of the disk, where the cold thermal torque may become relevant.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GM21-23067M" target="_blank" >GM21-23067M: Hydrodynamické interakce planet s protoplanetárními disky a původ těsných exoplanetárních soustav</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy &amp; Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

704

Číslo periodika v rámci svazku

prosinec

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

10

Strana od-do

A207

Kód UT WoS článku

001640452000023

EID výsledku v databázi Scopus

2-s2.0-105025442553