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Direct estimation of the Solar acceleration using geodetic/astrometric VLBI observations
Xu MingHui1; Wang GuangLi1; Zhao Ming1
2012
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
ISSN1674-7348
Volume55Issue:2Pages:329
AbstractThe secular aberration drift observed as the apparent proper motion of extragalactic radio sources is caused by the acceleration of the coordinate origin, the Solar System barycenter. So, the acceleration can be estimated as a global parameter by using the 30 years global geodetic/astrometric VLBI data. This estimation is independent of any kinematic or dynamic model of the Milky Way or statistics hypothesis. The estimated acceleration in the direction of the Galactic center is (0.80 +/- 0.04) cm center dot s(-1)center dot yr(-1), while the other two components are (-0.01 +/- 0.06) and (0.52 +/- 0.05) cm center dot s(-1)center dot yr(-1) in the direction along the Solar motion in the Galactic plane and in the direction normal to the Galactic plane, respectively. The estimate of the acceleration independently provides another kinematics parameter without referring to any objects within the Galaxy.
KeywordABERRATION MOTIONS solar acceleration secular aberration VLBI astrometry
Language英语
Funding Project[National Natural Science Foundation of China] ; [Shanghai Municipal Key Laboratory] ; [National Natural Science Foundation of China] ; [Shanghai Municipal Key Laboratory]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/62927
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.中国科学院
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xu MingHui,Wang GuangLi,Zhao Ming. Direct estimation of the Solar acceleration using geodetic/astrometric VLBI observations[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2012,55(2):329.
APA Xu MingHui,Wang GuangLi,&Zhao Ming.(2012).Direct estimation of the Solar acceleration using geodetic/astrometric VLBI observations.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,55(2),329.
MLA Xu MingHui,et al."Direct estimation of the Solar acceleration using geodetic/astrometric VLBI observations".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 55.2(2012):329.
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