Interpreting the Equatorially Antisymmetric Gravitational Field of Saturn Measured by the Cassini Grand Finale
文献类型：期刊论文
| 作者 | Qin, Songhe3,4; Kong, Dali4; Zhang, Keke2; Schubert, Gerald1; Huang, Yong4 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2020-02-10 |
| 卷号 | 890期号:1页码:4 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab6a9a |
| 英文摘要 | The equatorially antisymmetric gravitational field of Saturn, represented by the four gravitational coefficients J(3), J(5), J(7), and J(9), has been measured by the Cassini Grand Finale. Since the rotational distortion and the internal structure do not contribute to the asymmetric gravity field, the spectrum of the odd coefficients offers a direct window into the structure and amplitude of fluid motion in Saturn. We show that the observed cloud-top asymmetric winds extending into Saturn's interior cannot produce the measured gravity field, suggesting that the cloud-top winds are confined within a thin weather layer and hence do not contribute to the observed gravity. We interpret the asymmetric gravitational field by searching for an a priori unknown zonal circulation taking place in the molecular envelope. We find that a zonal circulation confined in the 20,000 km thick molecular layer produces the coefficients J(3), J(5), J(7), J(9) in agreement with measurements. The depth of the circulation is consistent with that inferred from the equatorially symmetric gravitational field of Saturn. |
| WOS关键词 | JUPITER ; CONVECTION ; ROTATION ; JETS ; INTERIORS |
| 资助项目 | 1000 Youth Talents Programme of China ; Science and Technology Development Fund, Macau SAR[001/2016/AFJ] ; Science and Technology Development Fund, Macau SAR[0001/2019/A1] ; Science and Technology Facilities Council[ST/R000891/1] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000522095800026 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | 1000 Youth Talents Programme of China ; 1000 Youth Talents Programme of China ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; Science and Technology Facilities Council ; Science and Technology Facilities Council ; 1000 Youth Talents Programme of China ; 1000 Youth Talents Programme of China ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; Science and Technology Facilities Council ; Science and Technology Facilities Council ; 1000 Youth Talents Programme of China ; 1000 Youth Talents Programme of China ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; Science and Technology Facilities Council ; Science and Technology Facilities Council ; 1000 Youth Talents Programme of China ; 1000 Youth Talents Programme of China ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; Science and Technology Facilities Council ; Science and Technology Facilities Council |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55344]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Kong, Dali |
| 作者单位 | 1.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA 2.Macau Univ Sci & Technol, State Key Lab Lunar & Planetary Sci, Taipa, Macau, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Planetary Sci, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Songhe,Kong, Dali,Zhang, Keke,et al. Interpreting the Equatorially Antisymmetric Gravitational Field of Saturn Measured by the Cassini Grand Finale[J]. ASTROPHYSICAL JOURNAL,2020,890(1):4. |
| APA | Qin, Songhe,Kong, Dali,Zhang, Keke,Schubert, Gerald,&Huang, Yong.(2020).Interpreting the Equatorially Antisymmetric Gravitational Field of Saturn Measured by the Cassini Grand Finale.ASTROPHYSICAL JOURNAL,890(1),4. |
| MLA | Qin, Songhe,et al."Interpreting the Equatorially Antisymmetric Gravitational Field of Saturn Measured by the Cassini Grand Finale".ASTROPHYSICAL JOURNAL 890.1(2020):4. |
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来源：国家天文台
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