The Albedos, Sizes, Colors, and Satellites of Dwarf Planets Compared with Newly Measured Dwarf Planet 2013 FY27

The Albedos, Sizes, Colors, and Satellites of Dwarf Planets Compared with Newly Measured Dwarf Planet 2013 FY27
复制标题

矮行星的反照率、大小、颜色和卫星与 2013 财年新测量的矮行星相比

DOI:
10.3847/1538-3881/aae92a
复制
发表时间:
2018
期刊:
The Astronomical Journal
影响因子:
--
通讯作者:
A. Moullet
A. Moullet
中科院分区:
--
文献类型:
--
作者:
S. Sheppard;Y. Fernández;A. Moullet

文献摘要

参考文献

被引文献

相似文献

2013 FY27 是第九个本质上最亮的海王星天体 (TNO)。我们使用 ALMA 的热波长和麦哲伦的光学来首次确定 2013 FY27 的大小和反照率,并将其与其他矮行星进行比较。我们发现 2013 FY27 的几何反照率和有效直径为 km。这使得 2013 财年处于最大的 TNO 之间的过渡区域,这些 TNO 的反照率和密度高于较小的 TNO。没有发现短期光变曲线,数小时和数天内的变化<0.06 ± 0.02 mag。 2013 财年的斯隆颜色为 g−r = 0.76 ± 0.02 和 r−i = 0.31 ± 0.03 mag,呈现出适度的红色。这与 10 个最大的 TNO 的中性或超红色颜色不同,使得 2013 FY27 成为最大的中红色 TNO 之一,这种颜色仅在直径小于 800 公里的地方可见且数量较多。这表明长度超过 800 公里的 TNO 可能与某些不同的因素有关。中等红色可能表示古老或冰贫的表面,而大于 800 公里的 TNO 具有更新鲜或更富含挥发物的表面。大于 800 公里的 TNO 可能会更加分化,从而赋予它们不同的表面成分。通过哈勃太空望远镜观测发现,一颗卫星的亮度为 0.″17,亮度为 3.0 ± 0.2 星等,比 2013 FY27 更暗。几乎所有最大的 TNO 都拥有卫星,其中包括 2013 财年的卫星。假设反照率相似,卫星直径约为 186 公里,即主直径。
2013 FY27 is the ninth intrinsically brightest Trans-Neptunian Object (TNO). We used ALMA at thermal wavelengths and Magellan in the optical to determine 2013 FY27's size and albedo for the first time and compare it to other dwarf planets. We found 2013 FY27 has a geometric albedo of and effective diameter of km. This puts 2013 FY27 in the transition region between the largest TNOs that have higher albedos and densities than smaller TNOs. No short-term light curve was found, with variations <0.06 ± 0.02 mag over hours and days. The Sloan colors of 2013 FY27 are g−r = 0.76 ± 0.02 and r−i = 0.31 ± 0.03 mag, giving a moderately red color. This is different than the neutral or ultra-red colors found for the 10 largest TNOs, making 2013 FY27 one of the largest moderately red TNOs, which are only seen, and in abundance, at diameters less than 800 km. This suggests something different might be associated with TNOs larger than 800 km. Moderately red colors might indicate old or ice-poor surfaces with TNOs larger than 800 km having fresher or more volatile-rich surfaces. TNOs larger than 800 km could be more differentiated, giving them different surface compositions. A satellite at 0.″17 and 3.0 ± 0.2 mag fainter than 2013 FY27 was found through Hubble Space Telescope observations. Almost all the largest TNOs have satellites, which now includes 2013 FY27. Assuming a similar albedo, the satellite is ∼186 km in diameter, making the primary km.
DOI: 10.3847/0004-637x/825/1/9
发表时间: 2016-03
期刊: The Astrophysical Journal
影响因子: --
作者:
N. Thyagarajan;A. Parsons;D. DeBoer;J. Bowman;A. Ewall-Wice;A. Neben;Nipanjana Patra
通讯作者: N. Thyagarajan;A. Parsons;D. DeBoer;J. Bowman;A. Ewall-Wice;A. Neben;Nipanjana Patra
92 au 处大型分散盘状天体的发现和物理表征
DOI: 10.3847/2041-8213/aa64d8
发表时间: 2017
期刊: The Astrophysical Journal
影响因子: --
作者:
Gerdes, D. W.;Sako, M.;Hamilton, S.;Zhang, K.;Khain, T.;Becker, J. C.;Annis, J.;Wester, W.;Bernstein, G. M.;Scheibner, C.
通讯作者: Scheibner, C.