The small satellites of Pluto as observed by New Horizons

被引：71

作者：

Weaver, H. A. ^{[1
]}

Buie, M. W. ^{[2
]}

Buratti, B. J. ^{[3
]}

Grundy, W. M. ^{[4
]}

Lauer, T. R. ^{[5
]}

Olkin, C. B. ^{[2
]}

Parker, A. H. ^{[2
]}

Porter, S. B. ^{[2
]}

Showalter, M. R. ^{[6
]}

Spencer, J. R. ^{[2
]}

Stern, S. A. ^{[2
]}

Verbiscer, A. J. ^{[7
]}

McKinnon, W. B. ^{[8
]}

Moore, J. M. ^{[9
]}

Robbins, S. J. ^{[2
]}

Schenk, P. ^{[10
]}

Singer, K. N. ^{[2
]}

Barnouin, O. S. ^{[1
]}

Cheng, A. F. ^{[1
]}

Ernst, C. M. ^{[1
]}

Lisse, C. M. ^{[1
]}

Lennings, D. E. ^{[11
]}

Lunsford, A. W. ^{[11
]}

Reuter, D. C. ^{[11
]}

Hamilton, D. P. ^{[12
]}

Kaufmann, D. E. ^{[2
]}

Ennico, K. ^{[9
]}

Young, L. A. ^{[2
]}

Beyer, R. A. ^{[6
,9
]}

Binzel, R. P. ^{[13
]}

Bray, V. J. ^{[14
]}

Chaikin, A. L.

Cook, J. C. ^{[2
]}

Cruiksh, D. P. ^{[9
]}

Dalle Ore, C. M. ^{[9
]}

Earle, A. M. ^{[14
]}

Gladstone, G. R. ^{[15
]}

Howett, C. J. A. ^{[2
]}

Linscott, I. R. ^{[16
]}

Nimmo, F. ^{[17
]}

Parker, J. Wm. ^{[2
]}

Philippe, S. ^{[18
]}

Protopapa, S. ^{[12
]}

Reitsema, H. J. ^{[2
]}

Schmitt, B. ^{[18
]}

Stryk, T. ^{[19
]}

Summers, M. E. ^{[20
]}

Tsang, C. C. C. ^{[2
]}

Throop, H. H. B. ^{[21
]}

White, O. L. ^{[9
]}

机构：

[1] Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA

[2] SW Res Inst, Boulder, CO 80302 USA

[3] CALTECH, NASA Jet Prop Lab, Pasadena, CA 91109 USA

[4] Lowell Observ, 1400 W Mars Hill Rd, Flagstaff, AZ 86001 USA

[5] Natl Opt Astron Observ, Tucson, AZ 26732 USA

[6] SETI Inst, Mountain View, CA 94043 USA

[7] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA

[8] Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA

[9] NASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035 USA

[10] Lunar & Planetary Inst, 3303 NASA Rd 1, Houston, TX 77058 USA

[11] NASA, Goddard Space Flight Ctr, Code 661, Greenbelt, MD 20771 USA

[12] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[13] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[14] Univ Arizona, Tucson, AZ 85721 USA

[15] SW Res Inst, San Antonio, TX 78238 USA

[16] Stanford Univ, Stanford, CA 94305 USA

[17] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA

[18] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

[19] Roane State Community Coll, Oak Ridge, TN 37830 USA

[20] George Mason Univ, Fairfax, VA 22030 USA

[21] Planetary Sci Inst, Tucson, AZ 85719 USA

来源：

SCIENCE | 2016年 / 351卷 / 6279期

关键词：

KUIPER-BELT OBJECTS; GIANT IMPACT ORIGIN; VOLATILE LOSS; SMALL MOONS; IMAGER; MASSES; SYSTEM; HYDRA; NIX;

D O I：

10.1126/science.aae0030

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 New Horizons mission has provided resolved measurements of Pluto's moons Styx, Nix, Kerberos, and Hydra. All four are small, with equivalent spherical diameters of similar to 40 kilometers for Nix and Hydra and similar to 10 kilometers for Styx and Kerberos. They are also highly elongated, with maximum to minimum axis ratios of similar to 2. All four moons have high albedos (similar to 50 to 90%) suggestive of a water-ice surface composition. Crater densities on Nix and Hydra imply surface ages of at least 4 billion years. The small moons rotate much faster than synchronous, with rotational poles clustered nearly orthogonal to the common pole directions of Pluto and Charon. These results reinforce the hypothesis that the small moons formed in the aftermath of a collision that produced the Pluto-Charon binary.

引用

页数：5

共 50 条

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