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arXiv 0803.1907astro-ph
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双星轨道参数的测定

Determination of the orbital parameters of binary pulsars

Bhaswati Bhattacharyya, Rajaram Nityananda

摘要:

本文提出了一种利用脉冲星周期数据确定双星轨道参数的简单方法。该方法利用开普勒运动的速度空间轨道的圆形性质,并基于两个一维搜索产生初步值。然后,使用计算效率高的线性最小二乘拟合对初步轨道参数值进行改进。该方法适用于双星轨道的随机和稀疏采样。我们在(a)高偏心脉冲双星PSR J 0514 -4002(球状星团NGC 1851中第一颗已知的脉冲星)和(b)47 Tuc T(一颗具有近圆形轨道的脉冲双星)上演示了该技术。

英文摘要:

We present a simple method for determination of the orbital parameters of binary pulsars, using data on the pulsar period at multiple observing epochs. This method uses the circular nature of the velocity space orbit of Keplerian motion and produces preliminary values based on two one dimensional searches. Preliminary orbital parameter values are then refined using a computationally efficient linear least square fit. This method works for random and sparse sampling of the binary orbit. We demonstrate the technique on (a) the highly eccentric binary pulsar PSR J0514-4002 (the first known pulsar in the globular cluster NGC 1851) and (b) 47 Tuc T, a binary pulsar with a nearly circular orbit.

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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