Evidence for Water in the Rocky Debris of a Disrupted Extrasolar Minor Planet

被引：153

作者：

Farihi, J. ^{[1
]}

Gaensicke, B. T. ^{[2
]}

Koester, D. ^{[3
]}

机构：

[1] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[2] Univ Warwick, Dept Phys, Coventry CV5 7AL, W Midlands, England

[3] Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany

来源：

SCIENCE | 2013年 / 342卷 / 6155期

基金：

英国科学技术设施理事会; 欧洲研究理事会;

关键词：

WHITE-DWARFS; ACCRETION; DUST; DIFFERENTIATION; DIFFUSION; METALS; DISKS;

D O I：

10.1126/science.1239447

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：

The existence of water in extrasolar planetary systems is of great interest because it constrains the potential for habitable planets and life. We have identified a circumstellar disk that resulted from the destruction of a water-rich and rocky extrasolar minor planet. The parent body formed and evolved around a star somewhat more massive than the Sun, and the debris now closely orbits the white dwarf remnant of the star. The stellar atmosphere is polluted with metals accreted from the disk, including oxygen in excess of that expected for oxide minerals, indicating that the parent body was originally composed of 26% water by mass. This finding demonstrates that water-bearing planetesimals exist around A- and F-type stars that end their lives as white dwarfs.

引用

页码：218 / 220

页数：3

共 34 条

[1] KEPLER'S FIRST ROCKY PLANET: KEPLER-10b [J].

Batalha, Natalie M. ;

Borucki, William J. ;

Bryson, Stephen T. ;

Buchhave, Lars A. ;

Caldwell, Douglas A. ;

Christensen-Dalsgaard, Jorgen ;

Ciardi, David ;

Dunham, Edward W. ;

Fressin, Francois ;

Gautier, Thomas N., III ;

Gilliland, Ronald L. ;

Haas, Michael R. ;

Howell, Steve B. ;

Jenkins, Jon M. ;

Kjeldsen, Hans ;

Koch, David G. ;

Latham, David W. ;

Lissauer, Jack J. ;

Marcy, Geoffrey W. ;

Rowe, Jason F. ;

Sasselov, Dimitar D. ;

Seager, Sara ;

Steffen, Jason H. ;

Torres, Guillermo ;

Basri, Gibor S. ;

Brown, Timothy M. ;

Charbonneau, David ;

Christiansen, Jessie ;

Clarke, Bruce ;

Cochran, William D. ;

Dupree, Andrea ;

Fabrycky, Daniel C. ;

Fischer, Debra ;

Ford, Eric B. ;

Fortney, Jonathan ;

Girouard, Forrest R. ;

Holman, Matthew J. ;

Johnson, John ;

Isaacson, Howard ;

Klaus, Todd C. ;

Machalek, Pavel ;

Moorehead, Althea V. ;

Morehead, Robert C. ;

Ragozzine, Darin ;

Tenenbaum, Peter ;

Twicken, Joseph ;

Quinn, Samuel ;

VanCleve, Jeffrey ;

Walkowicz, Lucianne M. ;

Welsh, William F. .

ASTROPHYSICAL JOURNAL, 2011, 729 (01)

[2] THE LINK BETWEEN PLANETARY SYSTEMS, DUSTY WHITE DWARFS, AND METAL-POLLUTED WHITE DWARFS [J].

Debes, John H. ;

Walsh, Kevin J. ;

Stark, Christopher .

ASTROPHYSICAL JOURNAL, 2012, 747 (02)

[3] FUSE observations of heavy elements in the photospheres of cool DB white dwarfs [J].

Desharnais, S. ;

Wesemael, F. ;

Chayer, P. ;

Kruk, J. W. ;

Saffer, R. A. .

ASTROPHYSICAL JOURNAL, 2008, 672 (01) :540-552

[4] Spitzer IRAC observations of white dwarfs.: I.: Warm dust at metal-rich degenerates [J].

Farihi, J. ;

Zuckerman, B. ;

Becklin, E. E. .

ASTROPHYSICAL JOURNAL, 2008, 674 (01) :431-446

[5] A trio of metal-rich dust and gas discs found orbiting candidate white dwarfs with K-band excess [J].

Farihi, J. ;

Gaensicke, B. T. ;

Steele, P. R. ;

Girven, J. ;

Burleigh, M. R. ;

Breedt, E. ;

Koester, D. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 421 (02) :1635-1643

[6] POSSIBLE SIGNS OF WATER AND DIFFERENTIATION IN A ROCKY EXOPLANETARY BODY [J].

Farihi, J. ;

Brinkworth, C. S. ;

Gaensicke, B. T. ;

Marsh, T. R. ;

Girven, J. ;

Hoard, D. W. ;

Klein, B. ;

Koester, D. .

ASTROPHYSICAL JOURNAL LETTERS, 2011, 728 (01)

[7] Rocky planetesimals as the origin of metals in DZ stars [J].

Farihi, J. ;

Barstow, M. A. ;

Redfield, S. ;

Dufour, P. ;

Hambly, N. C. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2010, 404 (04) :2123-2135

[8] STRENGTHENING THE CASE FOR ASTEROIDAL ACCRETION: EVIDENCE FOR SUBTLE AND DIVERSE DISKS AT WHITE DWARFS [J].

Farihi, J. ;

Jura, M. ;

Lee, J. -E. ;

Zuckerman, B. .

ASTROPHYSICAL JOURNAL, 2010, 714 (02) :1386-1397

[9] INFRARED SIGNATURES OF DISRUPTED MINOR PLANETS AT WHITE DWARFS [J].

Farihi, J. ;

Jura, M. ;

Zuckerman, B. .

ASTROPHYSICAL JOURNAL, 2009, 694 (02) :805-819

[10] Two Earth-sized planets orbiting Kepler-20 [J].

Fressin, Francois ;

Torres, Guillermo ;

Rowe, Jason F. ;

Charbonneau, David ;

Rogers, Leslie A. ;

Ballard, Sarah ;

Batalha, Natalie M. ;

Borucki, William J. ;

Bryson, Stephen T. ;

Buchhave, Lars A. ;

Ciardi, David R. ;

Desert, Jean-Michel ;

Dressing, Courtney D. ;

Fabrycky, Daniel C. ;

Ford, Eric B. ;

Gautier, Thomas N., III ;

Henze, Christopher E. ;

Holman, Matthew J. ;

Howard, Andrew ;

Howell, Steve B. ;

Jenkins, Jon M. ;

Koch, David G. ;

Latham, David W. ;

Lissauer, Jack J. ;

Marcy, Geoffrey W. ;

Quinn, Samuel N. ;

Ragozzine, Darin ;

Sasselov, Dimitar D. ;

Seager, Sara ;

Barclay, Thomas ;

Mullally, Fergal ;

Seader, Shawn E. ;

Still, Martin ;

Twicken, Joseph D. ;

Thompson, Susan E. ;

Uddin, Kamal .

NATURE, 2012, 482 (7384) :195-198

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