Quantifying the Impact of the Dust Torque on the Migration of Low-mass Planets
| Title: | Quantifying the Impact of the Dust Torque on the Migration of Low-mass Planets |
|---|---|
| Authors: | Guilera, Octavio M., Benitez-Llambay, Pablo, Bertolami, Marcelo M. Miller, Pessah, Martin E. |
| Publication Year: | 2023 |
| Collection: | Astrophysics |
| Subject Terms: | Astrophysics - Earth and Planetary Astrophysics |
| More Details: | Disk solids are critical in many planet formation processes, however, their effect on planet migration remains largely unexplored. Here we assess for the first time this important issue by building on the systematic measurements of dust torques on an embedded planet by Benitez-Llambay & Pessah (2018). Adopting standard models for the gaseous disk and its solid content, we quantify the impact of the dust torque for a wide range of conditions describing the disk/planet system. We show that the total torque can be positive and revert inward planet migration for planetary cores with $M_{\rm p} \lesssim 10 M_\oplus$. We compute formation tracks for low-mass embryos for conditions usually invoked when modeling planet formation processes. Our most important conclusion is that dust torques can have a significant impact on the migration and formation history of planetary embryos. The most important implications of our findings are: $\it{i})$ For nominal dust-to-gas mass ratios $\epsilon \simeq 0.01$, low-mass planets migrate outwards beyond the water ice-line if most of the mass in solids is in particles with Stokes numbers St $\simeq 0.1$. $\it{ii})$. For $\epsilon \gtrsim 0.02-0.05$, solids with small Stokes numbers, St $\simeq 0.01$, can play a dominant role if most of the mass is in those particles. $\it{iii})$ Dust torques have the potential to enable low-mass planetary cores formed in the inner disk to migrate outwards and act as the seed for massive planets at distances of tens of au. Comment: Paper submitted to ApJ after minor corrections required. Feedback from the community is welcome |
| Document Type: | Working Paper |
| DOI: | 10.3847/1538-4357/acd2cb |
| Access URL: | http://arxiv.org/abs/2305.02140 |
| Accession Number: | edsarx.2305.02140 |
| Database: | arXiv |
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| Items | – Name: Title Label: Title Group: Ti Data: Quantifying the Impact of the Dust Torque on the Migration of Low-mass Planets – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Guilera%2C+Octavio+M%2E%22">Guilera, Octavio M.</searchLink><br /><searchLink fieldCode="AR" term="%22Benitez-Llambay%2C+Pablo%22">Benitez-Llambay, Pablo</searchLink><br /><searchLink fieldCode="AR" term="%22Bertolami%2C+Marcelo+M%2E+Miller%22">Bertolami, Marcelo M. Miller</searchLink><br /><searchLink fieldCode="AR" term="%22Pessah%2C+Martin+E%2E%22">Pessah, Martin E.</searchLink> – Name: DatePubCY Label: Publication Year Group: Date Data: 2023 – Name: Subset Label: Collection Group: HoldingsInfo Data: Astrophysics – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Astrophysics+-+Earth+and+Planetary+Astrophysics%22">Astrophysics - Earth and Planetary Astrophysics</searchLink> – Name: Abstract Label: Description Group: Ab Data: Disk solids are critical in many planet formation processes, however, their effect on planet migration remains largely unexplored. Here we assess for the first time this important issue by building on the systematic measurements of dust torques on an embedded planet by Benitez-Llambay & Pessah (2018). Adopting standard models for the gaseous disk and its solid content, we quantify the impact of the dust torque for a wide range of conditions describing the disk/planet system. We show that the total torque can be positive and revert inward planet migration for planetary cores with $M_{\rm p} \lesssim 10 M_\oplus$. We compute formation tracks for low-mass embryos for conditions usually invoked when modeling planet formation processes. Our most important conclusion is that dust torques can have a significant impact on the migration and formation history of planetary embryos. The most important implications of our findings are: $\it{i})$ For nominal dust-to-gas mass ratios $\epsilon \simeq 0.01$, low-mass planets migrate outwards beyond the water ice-line if most of the mass in solids is in particles with Stokes numbers St $\simeq 0.1$. $\it{ii})$. For $\epsilon \gtrsim 0.02-0.05$, solids with small Stokes numbers, St $\simeq 0.01$, can play a dominant role if most of the mass is in those particles. $\it{iii})$ Dust torques have the potential to enable low-mass planetary cores formed in the inner disk to migrate outwards and act as the seed for massive planets at distances of tens of au.<br />Comment: Paper submitted to ApJ after minor corrections required. Feedback from the community is welcome – Name: TypeDocument Label: Document Type Group: TypDoc Data: Working Paper – Name: DOI Label: DOI Group: ID Data: 10.3847/1538-4357/acd2cb – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/2305.02140" linkWindow="_blank">http://arxiv.org/abs/2305.02140</link> – Name: AN Label: Accession Number Group: ID Data: edsarx.2305.02140 |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3847/1538-4357/acd2cb Subjects: – SubjectFull: Astrophysics - Earth and Planetary Astrophysics Type: general Titles: – TitleFull: Quantifying the Impact of the Dust Torque on the Migration of Low-mass Planets Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Guilera, Octavio M. – PersonEntity: Name: NameFull: Benitez-Llambay, Pablo – PersonEntity: Name: NameFull: Bertolami, Marcelo M. Miller – PersonEntity: Name: NameFull: Pessah, Martin E. IsPartOfRelationships: – BibEntity: Dates: – D: 03 M: 05 Type: published Y: 2023 |
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