Mercury's Circumsolar Dust Ring as an Imprint of a Recent Impact
A circumsolar dust ring has been recently discovered close to the orbit of Mercury. There are currently no hypotheses for the origin of this ring in the literature, so we explore four different origin scenarios here: the dust originated from (1) the sporadic meteoroid complex that comprises the majo...
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| Veröffentlicht in: | The planetary science journal 2023-02, Vol.4 (2), p.33 |
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| creator | Pokorný, Petr Deutsch, Ariel N. Kuchner, Marc J. |
| description | A circumsolar dust ring has been recently discovered close to the orbit of Mercury. There are currently no hypotheses for the origin of this ring in the literature, so we explore four different origin scenarios here: the dust originated from (1) the sporadic meteoroid complex that comprises the major portion of the Zodiacal Cloud, (2) recent asteroidal/cometary activity, (3) hypothetical dust-generating bodies locked in mean-motion resonances beyond Mercury, and (4) bodies co-orbiting with Mercury. We find that only scenario (4) reproduces the observed structure and location of Mercury's dust ring. However, the lifetimes of Mercury's co-orbitals ( |
| doi_str_mv | 10.3847/PSJ/acb52e |
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There are currently no hypotheses for the origin of this ring in the literature, so we explore four different origin scenarios here: the dust originated from (1) the sporadic meteoroid complex that comprises the major portion of the Zodiacal Cloud, (2) recent asteroidal/cometary activity, (3) hypothetical dust-generating bodies locked in mean-motion resonances beyond Mercury, and (4) bodies co-orbiting with Mercury. We find that only scenario (4) reproduces the observed structure and location of Mercury's dust ring. However, the lifetimes of Mercury's co-orbitals (<20 Ma) preclude a primordial origin of the co-orbiting source population due to dynamical instabilities and meteoroid bombardment, demanding a recent event feeding the observed dust ring. We find that an impact on Mercury can eject debris into the co-orbital resonance. We estimate the ages of six candidate impacts that formed craters larger than 40 km in diameter using high-resolution spacecraft data from MESSENGER and find two craters with estimated surface ages younger than 50 Ma. We find that the amount of mass transported from Mercury's surface into the co-orbital resonance from these two impacts is several orders of magnitude smaller than what is needed to explain the magnitude of Mercury's ring inferred from remote sensing. Therefore we suggest that numerous younger, smaller impacts collectively contributed to the origin of the ring. We conclude that the recent impact hypothesis for the origin of Mercury's dust ring is a viable scenario, whose validity can be constrained by future inner solar system missions.</description><identifier>ISSN: 2632-3338</identifier><identifier>EISSN: 2632-3338</identifier><identifier>DOI: 10.3847/PSJ/acb52e</identifier><language>eng</language><publisher>Goddard Space Flight Center: The American Astronomical Society</publisher><subject>Asteroids ; Craters ; Exobiology ; Impact phenomena ; Interplanetary dust ; Mercury (planet) ; Meteoroid dust clouds ; Orbital resonances ; Planetary surfaces ; Space Sciences (General) ; Zodiacal cloud</subject><ispartof>The planetary science journal, 2023-02, Vol.4 (2), p.33</ispartof><rights>2023. The Author(s). 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Sci. J</addtitle><description>A circumsolar dust ring has been recently discovered close to the orbit of Mercury. There are currently no hypotheses for the origin of this ring in the literature, so we explore four different origin scenarios here: the dust originated from (1) the sporadic meteoroid complex that comprises the major portion of the Zodiacal Cloud, (2) recent asteroidal/cometary activity, (3) hypothetical dust-generating bodies locked in mean-motion resonances beyond Mercury, and (4) bodies co-orbiting with Mercury. We find that only scenario (4) reproduces the observed structure and location of Mercury's dust ring. However, the lifetimes of Mercury's co-orbitals (<20 Ma) preclude a primordial origin of the co-orbiting source population due to dynamical instabilities and meteoroid bombardment, demanding a recent event feeding the observed dust ring. We find that an impact on Mercury can eject debris into the co-orbital resonance. We estimate the ages of six candidate impacts that formed craters larger than 40 km in diameter using high-resolution spacecraft data from MESSENGER and find two craters with estimated surface ages younger than 50 Ma. We find that the amount of mass transported from Mercury's surface into the co-orbital resonance from these two impacts is several orders of magnitude smaller than what is needed to explain the magnitude of Mercury's ring inferred from remote sensing. Therefore we suggest that numerous younger, smaller impacts collectively contributed to the origin of the ring. We conclude that the recent impact hypothesis for the origin of Mercury's dust ring is a viable scenario, whose validity can be constrained by future inner solar system missions.</description><subject>Asteroids</subject><subject>Craters</subject><subject>Exobiology</subject><subject>Impact phenomena</subject><subject>Interplanetary dust</subject><subject>Mercury (planet)</subject><subject>Meteoroid dust clouds</subject><subject>Orbital resonances</subject><subject>Planetary surfaces</subject><subject>Space Sciences (General)</subject><subject>Zodiacal cloud</subject><issn>2632-3338</issn><issn>2632-3338</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>CYI</sourceid><sourceid>DOA</sourceid><recordid>eNptkEtLw0AURgdRsNRuXLsYXCgIscm8kuyU-qpUlKrr4c6rJLRJmEkX_feORsRFV_fj3o_D5SB0mqXXtGD59O39eQpacWIP0IgIShJKaXH4Lx-jSQh1mqaEZ5nIxQjdvFivt353GfCsimkT2jV4fLcNPV5WzQpDwNDg-abzVdPj1mHAS6ttzHEHuj9BRw7WwU5-5xh9Ptx_zJ6SxevjfHa7SDTLSJ9QRsrSgKK0ZFxwDSbljDujSjAFs6UDyiwnjjDFNRMsFSzT8W9mwbDMUDpG84FrWqhl_GYDfidbqOTPovUrCb6v9NpKk6tSaWHz0lomjCsKy6MXq5VxpREqsq4GlvZtCN66P16Wym-VMqqUg8pYPhvKDQSQTe-DJCmhUaIoBIvni-FctZ2s261vooX9nPM9xS7UkkkiKZWdcfQLT5aITA</recordid><startdate>20230201</startdate><enddate>20230201</enddate><creator>Pokorný, Petr</creator><creator>Deutsch, Ariel N.</creator><creator>Kuchner, Marc J.</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>CYE</scope><scope>CYI</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0002-5667-9337</orcidid><orcidid>https://orcid.org/0000-0002-2387-5489</orcidid><orcidid>https://orcid.org/0000-0001-9831-3619</orcidid></search><sort><creationdate>20230201</creationdate><title>Mercury's Circumsolar Dust Ring as an Imprint of a Recent Impact</title><author>Pokorný, Petr ; Deutsch, Ariel N. ; Kuchner, Marc J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c412t-34299dab3394565cad0545fdb9ad84e9fa34e52f24b5c4640641c2634ead41d33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Asteroids</topic><topic>Craters</topic><topic>Exobiology</topic><topic>Impact phenomena</topic><topic>Interplanetary dust</topic><topic>Mercury (planet)</topic><topic>Meteoroid dust clouds</topic><topic>Orbital resonances</topic><topic>Planetary surfaces</topic><topic>Space Sciences (General)</topic><topic>Zodiacal cloud</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pokorný, Petr</creatorcontrib><creatorcontrib>Deutsch, Ariel N.</creatorcontrib><creatorcontrib>Kuchner, Marc J.</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><collection>NASA Scientific and Technical Information</collection><collection>NASA Technical Reports Server</collection><collection>CrossRef</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>The planetary science journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pokorný, Petr</au><au>Deutsch, Ariel N.</au><au>Kuchner, Marc J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mercury's Circumsolar Dust Ring as an Imprint of a Recent Impact</atitle><jtitle>The planetary science journal</jtitle><stitle>PSJ</stitle><addtitle>Planet. Sci. J</addtitle><date>2023-02-01</date><risdate>2023</risdate><volume>4</volume><issue>2</issue><spage>33</spage><pages>33-</pages><issn>2632-3338</issn><eissn>2632-3338</eissn><abstract>A circumsolar dust ring has been recently discovered close to the orbit of Mercury. There are currently no hypotheses for the origin of this ring in the literature, so we explore four different origin scenarios here: the dust originated from (1) the sporadic meteoroid complex that comprises the major portion of the Zodiacal Cloud, (2) recent asteroidal/cometary activity, (3) hypothetical dust-generating bodies locked in mean-motion resonances beyond Mercury, and (4) bodies co-orbiting with Mercury. We find that only scenario (4) reproduces the observed structure and location of Mercury's dust ring. 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| subjects | Asteroids Craters Exobiology Impact phenomena Interplanetary dust Mercury (planet) Meteoroid dust clouds Orbital resonances Planetary surfaces Space Sciences (General) Zodiacal cloud |
| title | Mercury's Circumsolar Dust Ring as an Imprint of a Recent Impact |
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