Evidence for differentiation of the most primitive small bodies
peer reviewed Context. Dynamical models of Solar System evolution have suggested that the so-called P- and D-type volatile-rich asteroids formed in the outer Solar System beyond Neptune's orbit and may be genetically related to the Jupiter Trojans, comets, and small Kuiper belt objects (KBOs)....
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2021
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Online Access: | https://orbi.uliege.be/handle/2268/261472 https://orbi.uliege.be/bitstream/2268/261472/1/Carry_2021.pdf https://doi.org/10.1051/0004-6361/202140342 |
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ftorbi:oai:orbi.ulg.ac.be:2268/261472 2024-04-21T08:12:35+00:00 Evidence for differentiation of the most primitive small bodies Carry, B. Vernazza, P. Vachier, F. Neveu, Marc Berthier, J. Hanuš, J. Ferrais, Marin Jorda, L. Marsset, M. Viikinkoski, M. Bartczak, P. Behrend, R. Benkhaldoun, Z. Birlan, M. Castillo-Rogez, J. Cipriani, F. Colas, F. Drouard, A. Dudziński, G. P. Desmars, J. Dumas, C. Ďurech, J. Fetick, R. Fusco, T. Grice, J. Jehin, Emmanuel 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, Bin 2021-06-01 https://orbi.uliege.be/handle/2268/261472 https://orbi.uliege.be/bitstream/2268/261472/1/Carry_2021.pdf https://doi.org/10.1051/0004-6361/202140342 en eng EDP Sciences https://ui.adsabs.harvard.edu/abs/2021A&A.650A.129C urn:issn:0004-6361 urn:issn:1432-0746 https://orbi.uliege.be/handle/2268/261472 info:hdl:2268/261472 https://orbi.uliege.be/bitstream/2268/261472/1/Carry_2021.pdf doi:10.1051/0004-6361/202140342 scopus-id:2-s2.0-85108200790 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Astronomy and Astrophysics, 650, A129 (2021-06-01) minor planets asteroids: general Kuiper belt: general asteroids: individual: Sylvia Astrophysics - Earth and Planetary Astrophysics Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2021 ftorbi https://doi.org/10.1051/0004-6361/202140342 2024-03-27T14:57:37Z peer reviewed Context. Dynamical models of Solar System evolution have suggested that the so-called P- and D-type volatile-rich asteroids formed in the outer Solar System beyond Neptune's orbit and may be genetically related to the Jupiter Trojans, comets, and small Kuiper belt objects (KBOs). Indeed, the spectral properties of P- and D-type asteroids resemble that of anhydrous cometary dust. Aims: We aim to gain insights into the above classes of bodies by characterizing the internal structure of a large P- and D-type asteroid. Methods: We report high-angular-resolution imaging observations of the P-type asteroid (87) Sylvia with the Very Large Telescope Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument. These images were used to reconstruct the 3D shape of Sylvia. Our images together with those obtained in the past with large ground-based telescopes were used to study the dynamics of its two satellites. We also modeled Sylvia's thermal evolution. Results: The shape of Sylvia appears flattened and elongated (a/b ~1.45; a/c ~1.84). 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 its two satellites. This reveals an inhomogeneous internal structure, suggesting that Sylvia is differentiated. Conclusions: Sylvia's low density and differentiated interior can be explained by partial melting and mass redistribution through water percolation. The outer shell should be composed of material similar to interplanetary dust particles (IDPs) and the core should be 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 a size, partial melting was unavoidable due to the decay of long-lived radionuclides. In addition, we show that bodies as ... Article in Journal/Newspaper Tagish University of Liège: ORBi (Open Repository and Bibliography) Astronomy & Astrophysics 650 A129 |
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Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
minor planets asteroids: general Kuiper belt: general asteroids: individual: Sylvia Astrophysics - Earth and Planetary Astrophysics Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique |
spellingShingle |
minor planets asteroids: general Kuiper belt: general asteroids: individual: Sylvia Astrophysics - Earth and Planetary Astrophysics Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique Carry, B. Vernazza, P. Vachier, F. Neveu, Marc Berthier, J. Hanuš, J. Ferrais, Marin Jorda, L. Marsset, M. Viikinkoski, M. Bartczak, P. Behrend, R. Benkhaldoun, Z. Birlan, M. Castillo-Rogez, J. Cipriani, F. Colas, F. Drouard, A. Dudziński, G. P. Desmars, J. Dumas, C. Ďurech, J. Fetick, R. Fusco, T. Grice, J. Jehin, Emmanuel 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, Bin Evidence for differentiation of the most primitive small bodies |
topic_facet |
minor planets asteroids: general Kuiper belt: general asteroids: individual: Sylvia Astrophysics - Earth and Planetary Astrophysics Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique |
description |
peer reviewed Context. Dynamical models of Solar System evolution have suggested that the so-called P- and D-type volatile-rich asteroids formed in the outer Solar System beyond Neptune's orbit and may be genetically related to the Jupiter Trojans, comets, and small Kuiper belt objects (KBOs). Indeed, the spectral properties of P- and D-type asteroids resemble that of anhydrous cometary dust. Aims: We aim to gain insights into the above classes of bodies by characterizing the internal structure of a large P- and D-type asteroid. Methods: We report high-angular-resolution imaging observations of the P-type asteroid (87) Sylvia with the Very Large Telescope Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument. These images were used to reconstruct the 3D shape of Sylvia. Our images together with those obtained in the past with large ground-based telescopes were used to study the dynamics of its two satellites. We also modeled Sylvia's thermal evolution. Results: The shape of Sylvia appears flattened and elongated (a/b ~1.45; a/c ~1.84). 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 its two satellites. This reveals an inhomogeneous internal structure, suggesting that Sylvia is differentiated. Conclusions: Sylvia's low density and differentiated interior can be explained by partial melting and mass redistribution through water percolation. The outer shell should be composed of material similar to interplanetary dust particles (IDPs) and the core should be 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 a size, partial melting was unavoidable due to the decay of long-lived radionuclides. In addition, we show that bodies as ... |
format |
Article in Journal/Newspaper |
author |
Carry, B. Vernazza, P. Vachier, F. Neveu, Marc Berthier, J. Hanuš, J. Ferrais, Marin Jorda, L. Marsset, M. Viikinkoski, M. Bartczak, P. Behrend, R. Benkhaldoun, Z. Birlan, M. Castillo-Rogez, J. Cipriani, F. Colas, F. Drouard, A. Dudziński, G. P. Desmars, J. Dumas, C. Ďurech, J. Fetick, R. Fusco, T. Grice, J. Jehin, Emmanuel 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, Bin |
author_facet |
Carry, B. Vernazza, P. Vachier, F. Neveu, Marc Berthier, J. Hanuš, J. Ferrais, Marin Jorda, L. Marsset, M. Viikinkoski, M. Bartczak, P. Behrend, R. Benkhaldoun, Z. Birlan, M. Castillo-Rogez, J. Cipriani, F. Colas, F. Drouard, A. Dudziński, G. P. Desmars, J. Dumas, C. Ďurech, J. Fetick, R. Fusco, T. Grice, J. Jehin, Emmanuel 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, Bin |
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 |
EDP Sciences |
publishDate |
2021 |
url |
https://orbi.uliege.be/handle/2268/261472 https://orbi.uliege.be/bitstream/2268/261472/1/Carry_2021.pdf https://doi.org/10.1051/0004-6361/202140342 |
genre |
Tagish |
genre_facet |
Tagish |
op_source |
Astronomy and Astrophysics, 650, A129 (2021-06-01) |
op_relation |
https://ui.adsabs.harvard.edu/abs/2021A&A.650A.129C urn:issn:0004-6361 urn:issn:1432-0746 https://orbi.uliege.be/handle/2268/261472 info:hdl:2268/261472 https://orbi.uliege.be/bitstream/2268/261472/1/Carry_2021.pdf doi:10.1051/0004-6361/202140342 scopus-id:2-s2.0-85108200790 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1051/0004-6361/202140342 |
container_title |
Astronomy & Astrophysics |
container_volume |
650 |
container_start_page |
A129 |
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1796932687856926720 |