Thermodynamics of the dead-zone inner edge in protoplanetary disks

Faure, Julien; Fromang, Sébastien; Latter, Henrik N.

doi:10.1051/0004-6361/201321911

Cited by 25 publications

(34 citation statements)

References 54 publications

(93 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, we confirmed this behaviour using MHD simulations that self-consistently accounted for both turbulent heating and the feedback between temperature and magnetic diffusivity (Faure et al 2014). However, in order to reduce the computational cost of these simulations, vortex formation was artificially inhibited by using a reduced azimuthal domain.…”

Section: Introductionsupporting

confidence: 54%

“…(3) (see Balbus & Hawley 1998). We captured turbulent heating by solving the equation of total A132, page 2 of 12 energy conservation and used the same gas cooling function L as in Faure et al (2014),…”

Section: Set-upmentioning

confidence: 99%

“…The main difference with the set-up of Faure et al (2014) is the removal of the source term in the continuity equation. We found that the term could interfere with the development of density features and hence with the RWI.…”

Section: Set-upmentioning

confidence: 99%

“…Here, c s and Ω are the local sound speed and the angular frequency. In the 3D static dead-zone step the vortex launches waves that significantly increase the angular momentum transport in the dead zone (see Faure et al 2014). Hence the α t profile has two contributions coming from the turbulence and from the waves.…”

Section: Set-up and Run Parametersmentioning

confidence: 99%

See 3 more Smart Citations

Vortex cycles at the inner edges of dead zones in protoplanetary disks

Faure

Fromang

Latter

et al. 2015

A&A

Self Cite

View full text Add to dashboard Cite

Context. In protoplanetary disks, the inner boundary between the turbulent and laminar regions is a promising site for planet formation because solids may become trapped at the interface itself or in vortices generated by the Rossby wave instability. The disk thermodynamics and the turbulent dynamics at that location are entwined because of the importance of turbulent dissipation to thermal ionization and, conversely, of thermal ionization to turbulence. However, most previous work has neglected this dynamical coupling and have thus missed a crucial element of the physics in this region. Aims. In this paper, we aim to determine how the interplay between ionization and turbulence affects the formation and evolution of vortices at the interface between the active and the dead zones. Methods. Using the Godunov code RAMSES, we performed a 3D magnetohydrodynamic global numerical simulation of a cylindrical model of an MRI-turbulent protoplanetary disk, including thermodynamical effects and a temperature-dependant resistivity. The comparison with an analogous 2D viscous simulation was extensively used to help identify the relevant physical processes and the disk's long-term evolution. Results. We find that a vortex forms at the interface as a result of Rossby wave instability, migrates inward, and penetrates the active zone where it is destroyed by turbulent motions. Subsequently, a new vortex emerges a few tens of orbits later at the interface, and the new vortex migrates inward too. The sequence repeats itself, resulting in cycles of vortex formation, migration, and disruption. This surprising behaviour is successfully reproduced using two different codes. We characterize this vortex life cycle and discuss its implications for planet formation at the dead-active interface. Our results also call for a better understanding of vortex migration in complex thermodynamical environments. Conclusions. Our simulations highlight the importance of thermodynamical processes for the vortex evolution at the dead zone inner edge.

show abstract

Section: Introductionsupporting

confidence: 54%

Section: Set-upmentioning

confidence: 99%

Section: Set-upmentioning

confidence: 99%

Section: Set-up and Run Parametersmentioning

confidence: 99%

See 2 more Smart Citations

Vortex cycles at the inner edges of dead zones in protoplanetary disks

Faure

Fromang

Latter

et al. 2015

A&A

Self Cite

View full text Add to dashboard Cite

show abstract

“…The temperature threshold T MRI is a free parameter that sets the location of the transition between the viscous region and the inviscid region (Latter & Balbus 2012;Faure et al 2014). We choose T MRI = 0.41, which places the dead zone inner edge around R DZ = 3.4 R 0 .…”

Section: Disk Modelmentioning

confidence: 99%

Planet filtering at the inner edges of dead zones in protoplanetary disks

Faure

Nelson

2016

A&A

Self Cite

View full text Add to dashboard Cite

Context. The interface between the dead zone and the inner active zone in a protoplanetary disk provides a promising region where the inward migration of planets may be halted owing to the existence of strong corotation torques. Recent work has indicated that this region may be prone to supporting a vortex cycle, during which vortices form at the dead-active zone interface and migrate into the active region before being destroyed, after which a new vortex forms and the cycle repeats. Aims. The aim of this paper is to examine the interaction between migrating planets and this vortex cycle, and to determine the conditions under which planets are able to remain trapped at the dead-active zone interface. Methods. We use the magnetohydrodynamics (MHD) codes PLUTO and RAMSES to perform 2D viscous disk simulations and 3D MHD simulations of protoplanetary disks containing migrating planets. A temperature switch is used to control the effective viscosity at the dead-active zone interface. Results. We find that both low mass and non-gap forming higher mass planets are able to escape from the planet trap at the inner edge of the dead zone as a result of their interaction with the migrating vortices, whereas intermediate mass planets remain trapped for the duration of simulation run times. Conclusions. Our results indicate that the vortex cycle causes the dead zone inner edge to act as an effective and mass-dependent planet filter, allowing some planets to pass through this region and others to remain there over long timescales.

show abstract

Formation of CV chondrules by recycling of amoeboid olivine aggregate-like precursors

Marrocchi

Euverte

Villeneuve

et al. 2019

Geochimica et Cosmochimica Acta

102

View full text Add to dashboard Cite

We have studied porphyritic olivine-rich chondrules of the carbonaceous chondrite Kaba (CV3) by combined highresolution X-ray mapping, quantitative electron microprobe analyses, and oxygen isotopic analyses via secondary ion mass spectrometry. These chondrules contain smaller inner-chondrule olivine grains characterized by low refractory element (Ca, Al, Ti) contents, and larger outer-chondrule olivine crystals that are enriched in refractory elements and show complex Ti and Al oscillatory zonings. Our O isotopic survey revealed that many of the inner-chondrule olivines are 16 O-richer than the relatively isotopically uniform outer-chondrule olivines. Inner-chondrule olivine crystals-only a minority of which may be derived from earlier generations of chondrules-are likely mostly inherited from nebular condensates similar to AOAs, as they share similar isotopic and chemical features and are thus interpreted as relict grains. Still, being 16 O-poorer than most AOAs, they may have experienced significant exchange with a 16 O-poor reservoir prior to chondrule formation (even if to a lesser degree than relicts in CM2 and ungrouped C2 chondrites). Subsequent incomplete melting of the relict grains produced Ca-Al-Ti-rich melts that engulfed the remaining relict olivine grains. The complex Ti and Al zoning patterns in outer chondrule (host) olivines, in particular the systematic dilution near the margin, seem to reflect gas-melt interactions (with e.g. SiO (g), Mg (g)) which also buffered the O isotopic composition of chondrule hosts. Together, these results demonstrate that important episodes of recycling of nebular condensates occurred in the solar protoplanetary disk.

show abstract

Thermodynamics of the dead-zone inner edge in protoplanetary disks

Cited by 25 publications

References 54 publications

Vortex cycles at the inner edges of dead zones in protoplanetary disks

Vortex cycles at the inner edges of dead zones in protoplanetary disks

Planet filtering at the inner edges of dead zones in protoplanetary disks

Formation of CV chondrules by recycling of amoeboid olivine aggregate-like precursors

Contact Info

Product

Resources

About