论文标题
活跃的小行星（3200）Phaethon的近红外观察没有任何水合的证据
Near-infrared observations of active asteroid (3200) Phaethon reveal no evidence for hydration
论文作者
论文摘要
小行星（3200）Phaethon是一种活跃的近地小行星，是双子苷阵雨的母体。由于其围栏距离很小，Phaethon的表面达到了足以破坏水合材料稳定的温度。我们对这款小行星进行了旋转分辨的光谱观测，主要覆盖北半球和赤道区域，超过2.5微米，以寻找其表面上的水合的证据。在这里，我们表明，观测到的腓森的部分不会表现出3-微微水合的矿物质吸收（在2-sigma之内）。这些观察结果表明，Phaethon的现代活动并不是由于其表面上的苯硅酸盐的挥发性升华或散发性。观测到的菲森的部分最初是水分的，此后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，或者是由无水物质形成的。
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-micron to search for evidence of hydration on its surface. Here we show that the observed part of Phaethon does not exhibit the 3-micron hydrated mineral absorption (within 2-sigma). 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.
