Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10330173" target="_blank" >RIV/00216208:11320/16:10330173 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/2016GL068634" target="_blank" >http://dx.doi.org/10.1002/2016GL068634</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/2016GL068634" target="_blank" >10.1002/2016GL068634</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data

Popis výsledku v původním jazyce

The intense plume activity at the South Pole of Enceladus together with the recent detection of libration hints at an internal water ocean underneath the outer ice shell. However, the interpretation of gravity, shape, and libration data leads to contradicting results regarding the depth of ocean/ice interface and the total volume of the ocean. Here we develop an interior structure model consisting of a rocky core, an internal ocean, and an ice shell, which satisfies simultaneously the gravity, shape, and libration data. We show that the data can be reconciled by considering isostatic compensation including the effect of a few hundred meter thick elastic lithosphere. Our model predicts that the core radius is 180-185km, the ocean density is at least 1030kg/m(3), and the ice shell is 18-22km thick on average. The ice thicknesses are reduced at poles decreasing to less than 5km in the south polar region.

Název v anglickém jazyce

Enceladus's internal ocean and ice shell constrained from Cassini gravity, shape, and libration data

Popis výsledku anglicky

The intense plume activity at the South Pole of Enceladus together with the recent detection of libration hints at an internal water ocean underneath the outer ice shell. However, the interpretation of gravity, shape, and libration data leads to contradicting results regarding the depth of ocean/ice interface and the total volume of the ocean. Here we develop an interior structure model consisting of a rocky core, an internal ocean, and an ice shell, which satisfies simultaneously the gravity, shape, and libration data. We show that the data can be reconciled by considering isostatic compensation including the effect of a few hundred meter thick elastic lithosphere. Our model predicts that the core radius is 180-185km, the ocean density is at least 1030kg/m(3), and the ice shell is 18-22km thick on average. The ice thicknesses are reduced at poles decreasing to less than 5km in the south polar region.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DE - Zemský magnetismus, geodesie, geografie

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geophysical Research Letters

ISSN

0094-8276

e-ISSN

—

Svazek periodika

43

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

5653-5660

Kód UT WoS článku

000379851800014

EID výsledku v databázi Scopus

2-s2.0-84977449616