Studying the Solar system dynamics using pulsar timing arrays and the LINIMOSS dynamical model

doi:10.1093/mnras/stz2515

	Studying the Solar system dynamics using pulsar timing arrays and the LINIMOSS dynamical model
	Guo, Y. J.1; Li, G. Y.2; Lee, K. J.1,3; Caballero, R. N.1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2019-11-01
卷号	489 期号:4 页码:5573-5581
关键词	methods: data analysis pulsars: general
ISSN号	0035-8711
DOI	10.1093/mnras/stz2515
通讯作者	Lee, K. J.(kjlee@pku.edu.cn)
英文摘要	Pulsar timing arrays (PTAs) can be used to study the Solar system ephemeris (SSE), the errors of which can lead to correlated timing residuals and significantly contribute to the PTA noise budget. Most Solar system studies with PTAs assume the dominance of the term from the shift of the Solar system barycentre (SSB). However, it is unclear to which extent this approximation can be valid, since the perturbations on the planetary orbits may become important as data precision keeps increasing. To better understand the effects of SSE uncertainties on pulsar timing, we develop the LINIMOSS dynamical model of the Solar system, based on the SSE of Guangyu Li. Using the same input parameters as DE435, the calculated planetary positions by LINIMOSS are compatible with DE435 at centimetre level over a 20 yr timespan, which is sufficiently precise for pulsar-timing applications. We utilize LINIMOSS to investigate the effects of SSE errors on pulsar timing in a fully dynamical way, by perturbing one SSE parameter per trial and examining the induced timing residuals. For the outer planets, the timing residuals are dominated by the SSB shift, as assumed in previous work. For the inner planets, the variations in the orbit of the Earth are more prominent, making previously adopted assumptions insufficient. The power spectra of the timing residuals have complex structures, which may introduce false signals in the search of gravitational waves. We also study how to infer the SSE parameters using PTAs, and calculate the accuracy of parameter estimation.
WOS关键词	PACKAGE ; TEMPO2
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000489302400082
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/28267]
专题	中国科学院紫金山天文台
通讯作者	Lee, K. J.
作者单位	1.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 2.Acad Sinica, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 3.Chinese Acad Sci, Nat Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Guo, Y. J.,Li, G. Y.,Lee, K. J.,et al. Studying the Solar system dynamics using pulsar timing arrays and the LINIMOSS dynamical model[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,489(4):5573-5581.
APA	Guo, Y. J.,Li, G. Y.,Lee, K. J.,&Caballero, R. N..(2019).Studying the Solar system dynamics using pulsar timing arrays and the LINIMOSS dynamical model.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,489(4),5573-5581.
MLA	Guo, Y. J.,et al."Studying the Solar system dynamics using pulsar timing arrays and the LINIMOSS dynamical model".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 489.4(2019):5573-5581.