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Search for water outgassing of (1) Ceres near perihelion
Rousselot, P.1; Opitom, C.2; Jehin, E.3; Hutsemékers, D.3; Manfroid, J.3; Villarreal, M.N.4; Li, J.-Y.5; Castillo-Rogez, J.4; Russell, C.T.6; Vernazza, P.7; Marsset, M.8; Roth, L.9; Dumas, C.10; Yang B(杨彬)2,11; Prettyman, T.H.5; Mousis, O.7
发表期刊ASTRONOMY & ASTROPHYSICS
2019-07-30
卷号628页码:6
DOI10.1051/0004-6361/201935738
产权排序第11完成单位
收录类别SCI ; EI
关键词minor planets, asteroids: individual: (1) Ceres
摘要

Context. (1) Ceres is the largest body in the main asteroid belt and one of the most intriguing objects in the solar system, in part because of the discovery of water outgassing by the Herschel Space Observatory (HSO) and its still-debated origin. Ceres was the target of NASA's Dawn spacecraft for 3.5 yr, which achieved a detailed characterization of the dwarf planet. The possible influence of the local flux of solar energetic particles (SEP) on the production of a Cerean exosphere and water vapor has been suggested, in addition to the sublimation of water ice that depends on the temperature, meaning the heliocentric distance. Aims. We used the opportunity of both the perihelion passage of (1) Ceres in April 2018, and the presence of Dawn in its vicinity (for measuring the SEP flux in real time) to check the influence of heliocentric distance and SEP flux on water outgassing. Methods. We searched for OH emission lines near the limb of Ceres in the near-UV with the UVES spectrograph mounted on the 8-m ESO Very Large Telescope. Two spectra were recorded when Ceres was close to its perihelion, in February 2018, and with Dawn spacecraft orbiting Ceres. It was possible to simultaneously measure energetic particles around Ceres at the time of our observations. Results. Our observations did not permit detection of OH emission lines to a very high sensitivity level. This level is estimated to correspond to a global water production rate of Q(H2O) similar to 2 x 10(26) molecules s(-1), similar to the water production rate derived from HSO observations. The solar energetic particles flux measured around Ceres was negligible at the time of these observations. Conclusions. Our observations support the idea that heliocentric distance (i.e., the sublimation of water ice) does not play a major role in the water emission from Ceres. This production rate could be either related to SEP events or to other mechanisms, possibly of endogenic origin.

资助项目N/A
项目资助者N/A
语种英语
学科领域天文学 ; 太阳与太阳系
学科门类理学 ; 理学::天文学
文章类型Article
出版者EDP SCIENCES S A
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN1432-0746
URL查看原文
WOS记录号WOS:000477791100002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CONSTRAINTS ; ICE ; VAPOR ; TELESCOPE ; EXOSPHERE ; SURFACES
EI入藏号20193207286671
EI主题词Orbits
EI分类号443.1 Atmospheric Properties - 657.2 Extraterrestrial Physics And Stellar Phenomena - 711 Electromagnetic Waves - 802.3 Chemical Operations - 931.3 Atomic And Molecular Physics
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/20583
专题其他
通讯作者Rousselot, P.
作者单位1.Institut UTINAM UMR 6213, CNRS, Université Bourgogne Franche-Comté, OSU THETA, BP 1615, Besançon Cedex, 25010, France
2.European Southern Observatory, Alonso de Còrdova 3107, Vitacura Casilla, Santiago, 19001, Chile
3.Space Sciences, Technologies and Astrophysics Research (STAR) Institute, University of Liège, Liège, Belgium
4.Jet Propulsion Laboratory, California Institute of Technology, Pasadena; CA, 91109, United States
5.Planetary Science Institute, 1700 E Fort Lowell Road, Tucson; AZ, 85719, United States
6.Earth, Planetary and Space Sciences, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA; 90095-1567, United States
7.Aix-Marseille Universite, CNRS, Laboratoire d'Astrophysique de Marseille, Marseille, France
8.Department of Earth, Atmospheric and Planetary Sciences, MIT, 77 Massachusetts Avenue, Cambridge; MA, 02139, United States
9.School of Electrical Engineering, KTH Royal Institute of Technology, Stockholm, Sweden
10.Thirty-Meter-Telescope, 100 West Walnut St, Suite 300, Pasadena; CA, 91124, United States
11.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China
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Rousselot, P.,Opitom, C.,Jehin, E.,et al. Search for water outgassing of (1) Ceres near perihelion[J]. ASTRONOMY & ASTROPHYSICS,2019,628:6.
APA Rousselot, P..,Opitom, C..,Jehin, E..,Hutsemékers, D..,Manfroid, J..,...&Mousis, O..(2019).Search for water outgassing of (1) Ceres near perihelion.ASTRONOMY & ASTROPHYSICS,628,6.
MLA Rousselot, P.,et al."Search for water outgassing of (1) Ceres near perihelion".ASTRONOMY & ASTROPHYSICS 628(2019):6.
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