کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8133123 | 1523409 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analysis of the Precision of Pulsar Time Clock Modeltwo
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Analysis of the Precision of Pulsar Time Clock Modeltwo Analysis of the Precision of Pulsar Time Clock Modeltwo](/preview/png/8133123.png)
چکیده انگلیسی
Millisecond pulsars have a very high rotation stability, which can be applied to many research fields, such as the establishment of the pulsar time standard, the detection of gravitational wave, the spacecraft navigation by using X-ray pulsars and so on. In this paper, we employ two millisecond pulsars PSR J0437-4715 and J1713+0743, which are observed by the International Pulsar Timing Array (IPTA), to analyze the precision of pulsar clock parameter and the prediction accuracy of pulse time of arrival (TOA). It is found that the uncertainty of spin frequency is 10â15 Hz, the uncertainty of the first derivative of spin frequency is 10â23 sâ2, and the precision of measured rotational parameters increases by one order of magnitude with the accumulated observational data every 4â¼5 years. In addition, the errors of TOAs within 4.8 yr which are predicted by the clock model established by the 10 yr data of J0437-4715 are less than 1 μs. Therefore, one can use the pulsar time standard to calibrate the atomic clock, and make the atomic time deviate from the TT (Terrestrial Time) less than 1 μs within 4.8 yr.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Astronomy and Astrophysics - Volume 42, Issue 2, AprilâJune 2018, Pages 291-302
Journal: Chinese Astronomy and Astrophysics - Volume 42, Issue 2, AprilâJune 2018, Pages 291-302
نویسندگان
Cheng-shi Zhao, Ming-lei Tong, Yu-ping Gao, Ting-gao Yang,