Influence of the Yarkovsky force on Jupiter Trojan asteroids
Aims. We investigate the influence of the Yarkovsky force on the long-term orbital evolution of Jupiter Trojan asteroids. Methods. Clones of the observed population with different sizes and different thermal properties were numerically integrated for 1 Gyr with and without the Yarkovsky effect. The...
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Veröffentlicht in: | Astronomy and astrophysics (Berlin) 2019-10, Vol.630, p.A148 |
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creator | Hellmich, S. Mottola, S. Hahn, G. Kührt, E. de Niem, D. |
description | Aims. We investigate the influence of the Yarkovsky force on the long-term orbital evolution of Jupiter Trojan asteroids. Methods. Clones of the observed population with different sizes and different thermal properties were numerically integrated for 1 Gyr with and without the Yarkovsky effect. The escape rate of these objects from the Trojan region as well as changes in the libration amplitude, eccentricity, and inclination were used as a metric of the strength of the Yarkovsky effect on the Trojan orbits. Results. Objects with radii R ≤ 1 km are significantly influenced by the Yarkovsky force. The effect causes a depletion of these objects over timescales of a few hundred million years. As a consequence, we expect the size-frequency distribution of small Trojans to show a shallower slope than that of the currently observable population (R ≳ 1 km), with a turning point between R = 100 m and R = 1 km. The effect of the Yarkovsky acceleration on the orbits of Trojans depends on the sense of rotation in a complex way. The libration amplitude of prograde rotators decreases with time while the eccentricity increases. Retrograde rotators experience the opposite effect, which results in retrograde rotators being ejected faster from the 1:1 resonance region. Furthermore, for objects affected by the Yarkovsky force, we find indications that the effect tends to smooth out the differences in the orbital distribution between the two clouds. |
doi_str_mv | 10.1051/0004-6361/201834715 |
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We investigate the influence of the Yarkovsky force on the long-term orbital evolution of Jupiter Trojan asteroids. Methods. Clones of the observed population with different sizes and different thermal properties were numerically integrated for 1 Gyr with and without the Yarkovsky effect. The escape rate of these objects from the Trojan region as well as changes in the libration amplitude, eccentricity, and inclination were used as a metric of the strength of the Yarkovsky effect on the Trojan orbits. Results. Objects with radii R ≤ 1 km are significantly influenced by the Yarkovsky force. The effect causes a depletion of these objects over timescales of a few hundred million years. As a consequence, we expect the size-frequency distribution of small Trojans to show a shallower slope than that of the currently observable population (R ≳ 1 km), with a turning point between R = 100 m and R = 1 km. The effect of the Yarkovsky acceleration on the orbits of Trojans depends on the sense of rotation in a complex way. The libration amplitude of prograde rotators decreases with time while the eccentricity increases. Retrograde rotators experience the opposite effect, which results in retrograde rotators being ejected faster from the 1:1 resonance region. Furthermore, for objects affected by the Yarkovsky force, we find indications that the effect tends to smooth out the differences in the orbital distribution between the two clouds.</description><identifier>ISSN: 0004-6361</identifier><identifier>EISSN: 1432-0746</identifier><identifier>DOI: 10.1051/0004-6361/201834715</identifier><language>eng</language><publisher>Heidelberg: EDP Sciences</publisher><subject>Amplitudes ; asteroids: general ; Depletion ; Eccentricity ; Frequency distribution ; Jupiter ; Libration ; methods: numerical ; minor planets ; Thermodynamic properties ; Trojan orbits</subject><ispartof>Astronomy and astrophysics (Berlin), 2019-10, Vol.630, p.A148</ispartof><rights>Copyright EDP Sciences Oct 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c426t-352dbbc05bf5b8455ad7362cf21c89eb65ef976e877bea57cd291fb9ea78561a3</citedby><cites>FETCH-LOGICAL-c426t-352dbbc05bf5b8455ad7362cf21c89eb65ef976e877bea57cd291fb9ea78561a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,3727,27924,27925</link.rule.ids></links><search><creatorcontrib>Hellmich, S.</creatorcontrib><creatorcontrib>Mottola, S.</creatorcontrib><creatorcontrib>Hahn, G.</creatorcontrib><creatorcontrib>Kührt, E.</creatorcontrib><creatorcontrib>de Niem, D.</creatorcontrib><title>Influence of the Yarkovsky force on Jupiter Trojan asteroids</title><title>Astronomy and astrophysics (Berlin)</title><description>Aims. We investigate the influence of the Yarkovsky force on the long-term orbital evolution of Jupiter Trojan asteroids. Methods. Clones of the observed population with different sizes and different thermal properties were numerically integrated for 1 Gyr with and without the Yarkovsky effect. The escape rate of these objects from the Trojan region as well as changes in the libration amplitude, eccentricity, and inclination were used as a metric of the strength of the Yarkovsky effect on the Trojan orbits. Results. Objects with radii R ≤ 1 km are significantly influenced by the Yarkovsky force. The effect causes a depletion of these objects over timescales of a few hundred million years. As a consequence, we expect the size-frequency distribution of small Trojans to show a shallower slope than that of the currently observable population (R ≳ 1 km), with a turning point between R = 100 m and R = 1 km. The effect of the Yarkovsky acceleration on the orbits of Trojans depends on the sense of rotation in a complex way. The libration amplitude of prograde rotators decreases with time while the eccentricity increases. Retrograde rotators experience the opposite effect, which results in retrograde rotators being ejected faster from the 1:1 resonance region. Furthermore, for objects affected by the Yarkovsky force, we find indications that the effect tends to smooth out the differences in the orbital distribution between the two clouds.</description><subject>Amplitudes</subject><subject>asteroids: general</subject><subject>Depletion</subject><subject>Eccentricity</subject><subject>Frequency distribution</subject><subject>Jupiter</subject><subject>Libration</subject><subject>methods: numerical</subject><subject>minor planets</subject><subject>Thermodynamic properties</subject><subject>Trojan orbits</subject><issn>0004-6361</issn><issn>1432-0746</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNo9kE1LAzEQhoMoWKu_wEvA89p8JwtepGhbLYhQEU8hm01w27qpya7Yf2-WSk_DDM87wzwAXGN0ixHHE4QQKwQVeEIQVpRJzE_ACDNKCiSZOAWjI3EOLlJa55ZkcATuFq3f9q61DgYPu08HP0zchJ-02UMf4jBu4VO_azoX4SqGtWmhSbkJTZ0uwZk32-Su_usYvD0-rKbzYvkyW0zvl4VlRHQF5aSuKot45XmlGOemllQQ6wm2qnSV4M6XUjglZeUMl7YmJfZV6YxUXGBDx-DmsHcXw3fvUqfXoY9tPqkJU4JzqhDNFD1QNoaUovN6F5svE_caIz1o0oMEPUjQR005VRxSTf7q9xjJErSQVHKt0LvGc0X5K3rWM_oH0itoeQ</recordid><startdate>20191001</startdate><enddate>20191001</enddate><creator>Hellmich, S.</creator><creator>Mottola, S.</creator><creator>Hahn, G.</creator><creator>Kührt, E.</creator><creator>de Niem, D.</creator><general>EDP Sciences</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20191001</creationdate><title>Influence of the Yarkovsky force on Jupiter Trojan asteroids</title><author>Hellmich, S. ; Mottola, S. ; Hahn, G. ; Kührt, E. ; de Niem, D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c426t-352dbbc05bf5b8455ad7362cf21c89eb65ef976e877bea57cd291fb9ea78561a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Amplitudes</topic><topic>asteroids: general</topic><topic>Depletion</topic><topic>Eccentricity</topic><topic>Frequency distribution</topic><topic>Jupiter</topic><topic>Libration</topic><topic>methods: numerical</topic><topic>minor planets</topic><topic>Thermodynamic properties</topic><topic>Trojan orbits</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hellmich, S.</creatorcontrib><creatorcontrib>Mottola, S.</creatorcontrib><creatorcontrib>Hahn, G.</creatorcontrib><creatorcontrib>Kührt, E.</creatorcontrib><creatorcontrib>de Niem, D.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Astronomy and astrophysics (Berlin)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hellmich, S.</au><au>Mottola, S.</au><au>Hahn, G.</au><au>Kührt, E.</au><au>de Niem, D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of the Yarkovsky force on Jupiter Trojan asteroids</atitle><jtitle>Astronomy and astrophysics (Berlin)</jtitle><date>2019-10-01</date><risdate>2019</risdate><volume>630</volume><spage>A148</spage><pages>A148-</pages><issn>0004-6361</issn><eissn>1432-0746</eissn><abstract>Aims. We investigate the influence of the Yarkovsky force on the long-term orbital evolution of Jupiter Trojan asteroids. Methods. Clones of the observed population with different sizes and different thermal properties were numerically integrated for 1 Gyr with and without the Yarkovsky effect. The escape rate of these objects from the Trojan region as well as changes in the libration amplitude, eccentricity, and inclination were used as a metric of the strength of the Yarkovsky effect on the Trojan orbits. Results. Objects with radii R ≤ 1 km are significantly influenced by the Yarkovsky force. The effect causes a depletion of these objects over timescales of a few hundred million years. As a consequence, we expect the size-frequency distribution of small Trojans to show a shallower slope than that of the currently observable population (R ≳ 1 km), with a turning point between R = 100 m and R = 1 km. The effect of the Yarkovsky acceleration on the orbits of Trojans depends on the sense of rotation in a complex way. The libration amplitude of prograde rotators decreases with time while the eccentricity increases. Retrograde rotators experience the opposite effect, which results in retrograde rotators being ejected faster from the 1:1 resonance region. Furthermore, for objects affected by the Yarkovsky force, we find indications that the effect tends to smooth out the differences in the orbital distribution between the two clouds.</abstract><cop>Heidelberg</cop><pub>EDP Sciences</pub><doi>10.1051/0004-6361/201834715</doi><oa>free_for_read</oa></addata></record> |
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subjects | Amplitudes asteroids: general Depletion Eccentricity Frequency distribution Jupiter Libration methods: numerical minor planets Thermodynamic properties Trojan orbits |
title | Influence of the Yarkovsky force on Jupiter Trojan asteroids |
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