中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Search for water outgassing of (1) Ceres near perihelion

文献类型:期刊论文

作者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
刊名ASTRONOMY & ASTROPHYSICS
出版日期2019-07-30
卷号628页码:6
ISSN号1432-0746
关键词minor planets, asteroids: individual: (1) Ceres
DOI10.1051/0004-6361/201935738
产权排序第11完成单位
文献子类Article
英文摘要

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.

学科主题天文学 ; 太阳与太阳系
URL标识查看原文
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
WOS关键词CONSTRAINTS ; ICE ; VAPOR ; TELESCOPE ; EXOSPHERE ; SURFACES
资助项目N/A
WOS研究方向Astronomy & Astrophysics
语种英语
出版者EDP SCIENCES S A
WOS记录号WOS:000477791100002
资助机构N/A
源URL[http://ir.ynao.ac.cn/handle/114a53/20583]  
专题云南天文台_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
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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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来源:云南天文台

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