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arXiv 1306.6626astro-ph.EP
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柯伊伯带掩星预测

Kuiper Belt Occultation Predictions

Wesley C. Fraser, Stephen Gwyn, Chad Trujillo, Andrew W. Stephens, JJ Kavelaars, Michael E. Brown, Federica B. Bianco, Richard P. Boyle, Melissa J. Brucker, Nat… 展开作者

Wesley C. Fraser, Stephen Gwyn, Chad Trujillo, Andrew W. Stephens, JJ Kavelaars, Michael E. Brown, Federica B. Bianco, Richard P. Boyle, Melissa J. Brucker, Nathan Hetherington, Michael Joner, William C. Keel, Phil P. Langill, Tim Lister, Russet J. McMillan, Leslie Young

摘要:

在这里,我们提出了7个大型柯伊伯带天体的观测。从这些观测中,我们提取了一个点源目录与$\sim0.01"$精度,和天体测量我们的目标柯伊伯带天体与$0.04-0.08"$精度在该目录。我们已经开发了一种新的技术来预测柯伊伯带天体未来发生的恒星掩星。该技术利用一种极大似然方法,确定对某一物体编目轨道要素的最佳调整。使用模拟的理论对象,我们讨论了这种技术的优点和缺点相比,普遍采用的星历偏移方法。我们证明了这两种方法都有各自的弱点,因此,它们共同提供了一个公平的评估,在一个特定的预测的真实不确定性。我们目前的掩星预测这两种方法的7个跟踪对象,日期晚至2015年。最后,我们讨论了三个独立的近距离通道的类星体现场恒星,这揭示了元素调整方法的准确性,也表明了必要性,考虑在恒星位置的不确定性时,评估潜在的掩星。

英文摘要:

Here we present observations of 7 large Kuiper Belt Objects. From these observations, we extract a point source catalog with $\sim0.01"$ precision, and astrometry of our target Kuiper Belt Objects with $0.04-0.08"$ precision within that catalog. We have developed a new technique to predict the future occurrence of stellar occultations by Kuiper Belt Objects. The technique makes use of a maximum likelihood approach which determines the best-fit adjustment to cataloged orbital elements of an object. Using simulations of a theoretical object, we discuss the merits and weaknesses of this technique compared to the commonly adopted ephemeris offset approach. We demonstrate that both methods suffer from separate weaknesses, and thus, together provide a fair assessment of the true uncertainty in a particular prediction. We present occultation predictions made by both methods for the 7 tracked objects, with dates as late as 2015. Finally, we discuss observations of three separate close passages of Quaoar to field stars, which reveal the accuracy of the element adjustment approach, and which also demonstrate the necessity of considering the uncertainty in stellar position when assessing potential occultations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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