Near-infrared observations of active asteroid (3200) Phaethon reveal no evidence for hydration

Near-infrared observations of active asteroid (3200) Phaethon reveal no evidence for hydration
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对活跃小行星 (3200) Phaethon 的近红外观测显示没有水合作用的证据

DOI:
10.1038/s41467-020-15637-7
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发表时间:
2020
影响因子:
16.6
通讯作者:
Arai, Tomoko
Arai, Tomoko
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Takir, Driss;Kareta, Theodore;Emery, Joshua P.;Hanuš, Josef;Reddy, Vishnu;Howell, Ellen S.;Rivkin, Andrew S.;Arai, Tomoko

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小行星(3200)法厄同(Phaethon)是一颗活跃的近地小行星,也是双子座流星雨的母体。由于它的近日点距离很小,法厄同的表面温度足以使水合物质不稳定。我们对这颗小行星进行了旋转分辨光谱观测,主要覆盖了北方半球和赤道地区,超过2.5微米,以寻找其表面水合作用的证据。在这里,我们发现Phaethon的观测部分没有表现出3 μm的水合矿物吸收(在2σ内)。这些观察结果表明法厄同的现代活动不是由于其表面层状硅酸盐的挥发性升华或脱挥发分。法厄同被观察到的部分可能最初是水合的,并且已经通过脱水从其表面失去了挥发物,支持其与帕拉斯家族的联系,或者它是由无水材料形成的。
Asteroid (3200) Phaethon is an active near-Earth asteroid and the parent body of the Geminid Meteor Shower. Because of its small perihelion distance, Phaethon’s surface reaches temperatures sufficient to destabilize hydrated materials. We conducted rotationally resolved spectroscopic observations of this asteroid, mostly covering the northern hemisphere and the equatorial region, beyond 2.5-µm to search for evidence of hydration on its surface. Here we show that the observed part of Phaethon does not exhibit the 3-µm hydrated mineral absorption (within 2σ). These observations suggest that Phaethon’s modern activity is not due to volatile sublimation or devolatilization of phyllosilicates on its surface. It is possible that the observed part of Phaethon was originally hydrated and has since lost volatiles from its surface via dehydration, supporting its connection to the Pallas family, or it was formed from anhydrous material.
命运任务:飞越双子座小行星 (3200) 法厄同 (Phaethon) 并现场分析地球上积聚的尘埃。
DOI: --
发表时间: 2018
期刊: 49th Lunar and Planetary Science Conference abstracts
影响因子: --
作者:
T. Arai;M. Kobayashi;K. Ishibashi;F. Yoshida;H. Kimura;K. Wada;H. Senshu;M. Yamada;O. Okudaira;T. Okamoto;S. Kameda;R. Srama;H. Kruger;M. Ishiguro;H. Yabuta;T. Nakamura;J. Watanabe;T. Ito;K. Ohtsuka;S. Tachibana
通讯作者: S. Tachibana
2017 年 12 月近地小行星 (3200) Phaethon 的偏振测量
DOI: --
发表时间: 2018
期刊:
影响因子: --
作者:
Shinnaka Yoshiharu;Kasuga Toshihiro;Furusho Reiko;Namiki Noriyuki;Noda Hirotomo;Terai Tsuyoshi;Watanabe Jun-ichi
通讯作者: Watanabe Jun-ichi
DOI: --
发表时间: 2015
期刊:
影响因子: --
作者:
D. Takir;J. Emery;H. McSween
通讯作者: H. McSween
DOI: 10.1038/s41467-019-09213-x
发表时间: 2019-03-19
影响因子: 16.6
作者:
Hergenrother, C. W.;Maleszewski, C. K.;Marty, B.
通讯作者: Marty, B.
有多少水合近地天体?
DOI: --
发表时间: 2018
期刊: Journal of Geophysical Research: Planets
影响因子: --
作者:
A. Rivkin;F. DeMeo
通讯作者: F. DeMeo