(16) Psyche: A mesosiderite-like asteroid?
(16) Psyche: A mesosiderite-like asteroid?
复制标题
(16) 普赛克：一颗类中菱铁矿的小行星？
DOI：
10.1051/0004-6361/201834091
复制
发表时间：
2018
影响因子：
6.5
通讯作者：
Fetick, R.
中科院分区：
文献类型：
--
作者：
Viikinkoski, M.;Vernazza, P.;Hanuš, J.;Le Coroller, H.;Tazhenova, K.;Carry, B.;Marsset, M.;Drouard, A.;Marchis, F.;Fetick, R.
Context. Asteroid (16) Psyche is the target of the NASA Psyche mission. It is considered one of the few main-belt bodies that could be an exposed proto-planetary metallic core and that would thus be related to iron meteorites. Such an association is however challenged by both its near- and mid-infrared spectral properties and the reported estimates of its density.Aims. Here, we aim to refine the density of (16) Psyche to set further constraints on its bulk composition and determine its potential meteoritic analog.Methods. We observed (16) Psyche with ESO VLT/SPHERE/ZIMPOL as part of our large program (ID 199.C-0074). We used the high angular resolution of these observations to refine Psyche’s three-dimensional (3D) shape model and subsequently its density when combined with the most recent mass estimates. In addition, we searched for potential companions around the asteroid.Results. We derived a bulk density of 3.99 ± 0.26gcm−3for Psyche. While such density is incompatible at the 3-sigma level with any iron meteorites (∼7.8gcm−3), it appears fully consistent with that of stony-iron meteorites such as mesosiderites (density ∼4.25gcm−3). In addition, we found no satellite in our images and set an upper limit on the diameter of any non-detected satellite of 1460 ± 200 m at 150 km from Psyche (0.2% ×RHill, the Hill radius) and 800 ± 200 m at 2000 km (3% ×RHill).Conclusions. Considering that the visible and near-infrared spectral properties of mesosiderites are similar to those of Psyche, there is merit to a long-published initial hypothesis that Psyche could be a plausible candidate parent body for mesosiderites.
登录
查看更多内容
影响因子：
3.2
作者：
M. Shepard;J. Richardson;P. Taylor;L. A. Rodriguez-Ford;A. Conrad;I. Pater;M. Ádámkovics;K. Kleer;J. Males;K. Morzinski;L. Close;M. Kaasalainen;M. Viikinkoski;B. Timerson;V. Reddy;C. Magri;M. Nolan;E. Howell;L. Benner;J. Giorgini;B. Warner;A. Harris
通讯作者：
M. Shepard;J. Richardson;P. Taylor;L. A. Rodriguez-Ford;A. Conrad;I. Pater;M. Ádámkovics;K. Kleer;J. Males;K. Morzinski;L. Close;M. Kaasalainen;M. Viikinkoski;B. Timerson;V. Reddy;C. Magri;M. Nolan;E. Howell;L. Benner;J. Giorgini;B. Warner;A. Harris
天体测量小行星质量：同时测定
影响因子：
6.5
作者：
E. Goffin
通讯作者：
E. Goffin
M 级和 X 级小行星的雷达勘测。
影响因子：
3.2
作者：
M. Shepard;P. Taylor;M. Nolan;E. Howell;A. Springmann;J. Giorgini;Brian D. Warner;A. Harris;R. Stephens;W. Merline;A. Rivkin;L. Benner;Daniel R. Coley;B. E. Clark;M. Ockert;C. Magri
通讯作者：
C. Magri
DOI：
--
发表时间：
1990
期刊：
影响因子：
--
作者：
S. Weidenschilling;C. Chapman;D. Davis;R. Greenberg;D. Levy;R. Binzel;S. M. Vail;M. Magee;D. Spaute
通讯作者：
D. Spaute
两个球体三重小行星系统的极端AO观测
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
B. Yang;Z. Wahhaj;L. Beauvalet;F. Marchis;C. Dumas;M. Marsset;E. Nielsen;F. Vachier
通讯作者：
F. Vachier