Evidence for differentiation of the most primitive small bodies
Dynamical models of Solar System evolution have suggested that P-/D-type volatile-rich asteroids formed in the outer Solar System and may be genetically related to the Jupiter Trojans, the comets and small KBOs. Indeed, their spectral properties resemble that of anhydrous cometary dust. High-angular...
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Online Access: | https://dx.doi.org/10.48550/arxiv.2103.06349 https://arxiv.org/abs/2103.06349 |
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ftdatacite:10.48550/arxiv.2103.06349 2023-05-15T18:30:05+02:00 Evidence for differentiation of the most primitive small bodies Carry, B. Vernazza, P. Vachier, F. Neveu, M. Hanus, J. Berthier J. Ferrais, M. Jorda, L. Marsset, M. Viikinkoski, M. Bartczak, P. Behrend, R. Benkhaldoun, Z. Birlan, M. Castillo-Rogez, J. Cipriani, F. Colas, F. Drouard, A. Dudzinski, G. P. Desmars, J. Dumas, C. Durech, J. Fetick, R. Fusco, T. Grice, J. Jehin, E. Kaasalainen, M. Kryszczynska, A. Lamy, P. Marchis, F. Marciniak, A. Michalowski, T. Michel, P. Pajuelo, M. Podlewska-Gaca, E. Rambaux, N. Santana-Ros, T. Storrs, A. Tanga, P. Vigan, A. Warner, B. Wieczorek, M. Witasse, O. Yang, B. 2021 https://dx.doi.org/10.48550/arxiv.2103.06349 https://arxiv.org/abs/2103.06349 unknown arXiv https://dx.doi.org/10.1051/0004-6361/202140342 Creative Commons Attribution Non Commercial No Derivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode cc-by-nc-nd-4.0 CC-BY-NC-ND Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences article-journal Article ScholarlyArticle Text 2021 ftdatacite https://doi.org/10.48550/arxiv.2103.06349 https://doi.org/10.1051/0004-6361/202140342 2022-03-10T14:27:09Z Dynamical models of Solar System evolution have suggested that P-/D-type volatile-rich asteroids formed in the outer Solar System and may be genetically related to the Jupiter Trojans, the comets and small KBOs. Indeed, their spectral properties resemble that of anhydrous cometary dust. High-angular-resolution images of P-type asteroid (87) Sylvia with VLT/SPHERE were used to reconstruct its 3D shape, and to study the dynamics of its two satellites. We also model Sylvia's thermal evolution. The shape of Sylvia appears flattened and elongated. We derive a volume-equivalent diameter of 271 +/- 5 km, and a low density of 1378 +/- 45 kg.m-3. The two satellites orbit Sylvia on circular, equatorial orbits. The oblateness of Sylvia should imply a detectable nodal precession which contrasts with the fully-Keplerian dynamics of the satellites. This reveals an inhomogeneous internal structure, suggesting that Sylvia is differentiated. Sylvia's low density and differentiated interior can be explained by partial melting and mass redistribution through water percolation. The outer shell would be composed of material similar to interplanetary dust particles (IDPs) and the core similar to aqueously altered IDPs or carbonaceous chondrite meteorites such as the Tagish Lake meteorite. Numerical simulations of the thermal evolution of Sylvia show that for a body of such size, partial melting was unavoidable due to the decay of long-lived radionuclides. In addition, we show that bodies as small as 130-150 km in diameter should have followed a similar thermal evolution, while smaller objects, such as comets and the KBO Arrokoth, must have remained pristine, in agreement with in situ observations of these bodies. NASA Lucy mission target (617) Patroclus (diameter~140 km) may, however, be differentiated. : Accepted for publication in A&A Article in Journal/Newspaper Tagish DataCite Metadata Store (German National Library of Science and Technology) Jupiter ENVELOPE(101.133,101.133,-66.117,-66.117) Tagish ENVELOPE(-134.272,-134.272,60.313,60.313) Tagish Lake ENVELOPE(-134.233,-134.233,59.717,59.717) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
spellingShingle |
Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences Carry, B. Vernazza, P. Vachier, F. Neveu, M. Hanus, J. Berthier J. Ferrais, M. Jorda, L. Marsset, M. Viikinkoski, M. Bartczak, P. Behrend, R. Benkhaldoun, Z. Birlan, M. Castillo-Rogez, J. Cipriani, F. Colas, F. Drouard, A. Dudzinski, G. P. Desmars, J. Dumas, C. Durech, J. Fetick, R. Fusco, T. Grice, J. Jehin, E. Kaasalainen, M. Kryszczynska, A. Lamy, P. Marchis, F. Marciniak, A. Michalowski, T. Michel, P. Pajuelo, M. Podlewska-Gaca, E. Rambaux, N. Santana-Ros, T. Storrs, A. Tanga, P. Vigan, A. Warner, B. Wieczorek, M. Witasse, O. Yang, B. Evidence for differentiation of the most primitive small bodies |
topic_facet |
Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
description |
Dynamical models of Solar System evolution have suggested that P-/D-type volatile-rich asteroids formed in the outer Solar System and may be genetically related to the Jupiter Trojans, the comets and small KBOs. Indeed, their spectral properties resemble that of anhydrous cometary dust. High-angular-resolution images of P-type asteroid (87) Sylvia with VLT/SPHERE were used to reconstruct its 3D shape, and to study the dynamics of its two satellites. We also model Sylvia's thermal evolution. The shape of Sylvia appears flattened and elongated. We derive a volume-equivalent diameter of 271 +/- 5 km, and a low density of 1378 +/- 45 kg.m-3. The two satellites orbit Sylvia on circular, equatorial orbits. The oblateness of Sylvia should imply a detectable nodal precession which contrasts with the fully-Keplerian dynamics of the satellites. This reveals an inhomogeneous internal structure, suggesting that Sylvia is differentiated. Sylvia's low density and differentiated interior can be explained by partial melting and mass redistribution through water percolation. The outer shell would be composed of material similar to interplanetary dust particles (IDPs) and the core similar to aqueously altered IDPs or carbonaceous chondrite meteorites such as the Tagish Lake meteorite. Numerical simulations of the thermal evolution of Sylvia show that for a body of such size, partial melting was unavoidable due to the decay of long-lived radionuclides. In addition, we show that bodies as small as 130-150 km in diameter should have followed a similar thermal evolution, while smaller objects, such as comets and the KBO Arrokoth, must have remained pristine, in agreement with in situ observations of these bodies. NASA Lucy mission target (617) Patroclus (diameter~140 km) may, however, be differentiated. : Accepted for publication in A&A |
format |
Article in Journal/Newspaper |
author |
Carry, B. Vernazza, P. Vachier, F. Neveu, M. Hanus, J. Berthier J. Ferrais, M. Jorda, L. Marsset, M. Viikinkoski, M. Bartczak, P. Behrend, R. Benkhaldoun, Z. Birlan, M. Castillo-Rogez, J. Cipriani, F. Colas, F. Drouard, A. Dudzinski, G. P. Desmars, J. Dumas, C. Durech, J. Fetick, R. Fusco, T. Grice, J. Jehin, E. Kaasalainen, M. Kryszczynska, A. Lamy, P. Marchis, F. Marciniak, A. Michalowski, T. Michel, P. Pajuelo, M. Podlewska-Gaca, E. Rambaux, N. Santana-Ros, T. Storrs, A. Tanga, P. Vigan, A. Warner, B. Wieczorek, M. Witasse, O. Yang, B. |
author_facet |
Carry, B. Vernazza, P. Vachier, F. Neveu, M. Hanus, J. Berthier J. Ferrais, M. Jorda, L. Marsset, M. Viikinkoski, M. Bartczak, P. Behrend, R. Benkhaldoun, Z. Birlan, M. Castillo-Rogez, J. Cipriani, F. Colas, F. Drouard, A. Dudzinski, G. P. Desmars, J. Dumas, C. Durech, J. Fetick, R. Fusco, T. Grice, J. Jehin, E. Kaasalainen, M. Kryszczynska, A. Lamy, P. Marchis, F. Marciniak, A. Michalowski, T. Michel, P. Pajuelo, M. Podlewska-Gaca, E. Rambaux, N. Santana-Ros, T. Storrs, A. Tanga, P. Vigan, A. Warner, B. Wieczorek, M. Witasse, O. Yang, B. |
author_sort |
Carry, B. |
title |
Evidence for differentiation of the most primitive small bodies |
title_short |
Evidence for differentiation of the most primitive small bodies |
title_full |
Evidence for differentiation of the most primitive small bodies |
title_fullStr |
Evidence for differentiation of the most primitive small bodies |
title_full_unstemmed |
Evidence for differentiation of the most primitive small bodies |
title_sort |
evidence for differentiation of the most primitive small bodies |
publisher |
arXiv |
publishDate |
2021 |
url |
https://dx.doi.org/10.48550/arxiv.2103.06349 https://arxiv.org/abs/2103.06349 |
long_lat |
ENVELOPE(101.133,101.133,-66.117,-66.117) ENVELOPE(-134.272,-134.272,60.313,60.313) ENVELOPE(-134.233,-134.233,59.717,59.717) |
geographic |
Jupiter Tagish Tagish Lake |
geographic_facet |
Jupiter Tagish Tagish Lake |
genre |
Tagish |
genre_facet |
Tagish |
op_relation |
https://dx.doi.org/10.1051/0004-6361/202140342 |
op_rights |
Creative Commons Attribution Non Commercial No Derivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode cc-by-nc-nd-4.0 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.48550/arxiv.2103.06349 https://doi.org/10.1051/0004-6361/202140342 |
_version_ |
1766213573642551296 |