A new approach to distant solar system object detection in large survey data sets

A new approach to distant solar system object detection in large survey data sets
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大型勘测数据集中遥远太阳系物体检测的新方法

DOI:
10.1051/0004-6361/201732254
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发表时间:
--
影响因子:
6.5
通讯作者:
Müller
Müller
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Perdelwitz;Völschow;Müller

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上下文。最近推测太阳系中存在一颗巨大的第九颗行星,这引发了通过新的观测和档案数据分析来寻找遥远的太阳系物体(SSO)的努力。由于该物体在光学和红外区域可能很模糊,到目前为止它还没有被探测到。我们着手重新分析广域红外探测探测器(WISE)获取的数据,WISE是一种非常适合探测SSO的全天候探测。我们提出了一种通过并列拟合来检测SSO的新方法。我们的代码使用日心距离作为拟合参数,在假设所有数据都来自一个对象的情况下,将三个或更多单观测点源的组转换为日心坐标。可以利用遥远的SSO的轨道在长时间尺度上在日心坐标下近似为线性这一事实来产生候选卫星,然后可以通过后续观测来证实这一点。我们通过对WISE数据中的外部SSO决策进行后验检测,证明了该方法的可行性。对行星九的全天搜索没有发现任何东西。结论。虽然假设的九号行星没有被我们的算法检测到,但我们初步预测,这种移动对象分析的新方法将使我们能够发现其他算法无法发现的新的遥远SSO。特别是在长时间间隔观察到稀疏数据的情况下,由于只使用了一个拟合参数,我们的方法是唯一的和健壮的。
Context. The recently postulated existence of a giant ninth planet in our solar system has sparked search efforts for distant solar system objects (SSOs) both via new observations and archival data analysis. Due to the likely faintness of the object in the optical and infrared regime, it has so far eluded detection.Aims. We set out to re-analyze data acquired by the Wide-Field Infrared Survey Explorer (WISE), an all-sky survey well suited for the detection of SSOs.Methods. We present a new approach to SSO detection via parallactic fitting. Using the heliocentric distance as a fit parameter, our code transforms groups of three or more single-observation point sources to heliocentric coordinates under the assumption that all data stem from an object. The fact that the orbit of a distant SSO is approximately linear in heliocentric coordinates over long time-scales can be utilized to produce candidates, which can then be confirmed with follow-up observations.Results. We demonstrate the feasibility of the approach by a posteriori detecting the outer SSO Makemake within WISE data. An all-sky search for Planet Nine yielded no detection.Conclusions. While the postulated Planet Nine eluded detection by our algorithm, we tentatively predict that this new approach to moving-object analysis will enable the discovery of new distant SSOs that cannot be discovered by other algorithms. Especially in cases of sparse data observed over long time spans, our approach is unique and robust due to the use of only one fit parameter.
行星系统相对于太阳赤道的倾斜可以通过行星 9 的存在来解释
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