Oxygen fugacities of extrasolar rocks: Evidence for an Earth-like geochemistry of exoplanets

被引：101
作者：
Doyle, Alexandra E. [1 ]
Young, Edward D. [1 ]
Klein, Beth [2 ]
Zuckerman, Ben [2 ]
Schlichting, Hilke E. [1 ,2 ,3 ]
机构：
[1] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA
[3] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA
来源：
SCIENCE | 2019年 / 366卷 / 6463期
基金：
美国国家航空航天局;
关键词：
CORE FORMATION; SOLAR NEBULA; OXIDIZED IRON; WHITE-DWARFS; METAL-RICH; CONSTRAINTS; ACCRETION; MANTLE; DEBRIS; CARBON;
D O I：
10.1126/science.aax3901
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Oxygen fugacity is a measure of rock oxidation that influences planetary structure and evolution. Most rocky bodies in the Solar System formed at oxygen fugacities approximately five orders of magnitude higher than a hydrogen-rich gas of solar composition. It is unclear whether this oxidation of rocks in the Solar System is typical among other planetary systems. We exploit the elemental abundances observed in six white dwarfs polluted by the accretion of rocky bodies to determine the fraction of oxidized iron in those extrasolar rocky bodies and therefore their oxygen fugacities. The results are consistent with the oxygen fugacities of Earth, Mars, and typical asteroids in the Solar System, suggesting that at least some rocky exoplanets are geophysically and geochemically similar to Earth.
引用
收藏
页码：356 / +
页数：28
相关论文
共 69 条
  • [41] A planetesimal orbiting within the debris disc around a white dwarf star
    Manser, Christopher J.
    Gansicke, Boris T.
    Eggl, Siegfried
    Hollands, Mark
    Izquierdo, Paula
    Koester, Detlev
    Landstreet, John D.
    Lyra, Wladimir
    Marsh, Thomas R.
    Meru, Farzana
    Mustill, Alexander J.
    Rodriguez-Gil, Pablo
    Toloza, Odette
    Veras, Dimitri
    Wilson, David J.
    Burleigh, Matthew R.
    Davies, Melvyn B.
    Farihi, Jay
    Fusillo, Nicola Gentile
    de Martino, Domitilla
    Parsons, Steven G.
    Quirrenbach, Andreas
    Raddi, Roberto
    Reffert, Sabine
    Del Santo, Melania
    Schreiber, Matthias R.
    Silvotti, Roberto
    Toonen, Silvia
    Villaver, Eva
    Wyatt, Mark
    Xu, Siyi
    Zwart, Simon Portegies
    [J]. SCIENCE, 2019, 364 (6435) : 66 - +
  • [42] A catalog of spectroscopically identified white dwarfs
    McCook, GP
    Sion, EM
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1999, 121 (01) : 1 - 130
  • [43] McDonough WF, 2003, Treatise on geochemistry, V2, P547, DOI [DOI 10.1016/B0-08-043751-6/02015-6, 10.1016/B0-08-043751-6/02015-6]
  • [44] Hydrous metasomatism of oceanic sub-arc mantle, Lihir, Papua New Guinea: petrology and geochemistry of fluid-metasomatised mantle wedge xenoliths
    McInnes, BIA
    Gregoire, M
    Binns, RA
    Herzig, PM
    Hannington, MD
    [J]. EARTH AND PLANETARY SCIENCE LETTERS, 2001, 188 (1-2) : 169 - 183
  • [45] DOES A DIFFERENTIATED, CARBONATE-RICH, ROCKY OBJECT POLLUTE THE WHITE DWARF SDSS J104341.53+085558.2?
    Melis, Carl
    Dufour, P.
    [J]. ASTROPHYSICAL JOURNAL, 2017, 834 (01)
  • [46] Water and the Interior Structure of Terrestrial Planets and Icy Bodies
    Monteux, J.
    Golabek, G. J.
    Rubie, D. C.
    Tobie, G.
    Young, E. D.
    [J]. SPACE SCIENCE REVIEWS, 2018, 214 (01)
  • [47] Newsom H. E., 1995, GLOBAL EARTH PHYSICS, V1, P159
  • [48] Nittler L.R., 2018, MERCURY VIEW MESSENG
  • [49] The Surface Composition of Mercury
    Nittler, Larry R.
    Weider, Shoshana Z.
    [J]. ELEMENTS, 2019, 15 (01) : 33 - 38
  • [50] Rates and styles of planetary cooling on Earth, Moon, Mars, and Vesta, using new models for oxygen fugacity, ferric-ferrous ratios, olivine-liquid Fe-Mg exchange, and mantle potential temperature
    Putirka, Keith
    [J]. AMERICAN MINERALOGIST, 2016, 101 (3-4) : 819 - 840
1234567