Precision Orbital Dynamics from Interstellar Scintillation Arcs for PSR J0437-4715

doi:10.3847/1538-4357/abbd40

CORC > 新疆天文台 > 研究单元未命名 > 射电天文研究室 > 脉冲星研究团组

	Precision Orbital Dynamics from Interstellar Scintillation Arcs for PSR J0437-4715
	Reardon, Daniel J.1,9; Coles, William A.10; Bailes, Matthew 1,9; Bhat, N. D. Ramesh 11; Dai, Shi 12; Hobbs, George B.9,12; Kerr, Matthew 13; Manchester, Richard N.12; Oslowski, Stefan 1; Parthasarathy, Aditya 1,9
刊名	ASTROPHYSICAL JOURNAL
	2020-12-01
卷号	904 期号:2 页码:104
关键词	Pulsars Millisecond pulsars Interstellar medium Interstellar plasma Binary pulsars Radio pulsars Interstellar scintillation Radio astronomy Orbital motion Astrometry Orbits Orbit determination
ISSN号	0004-637X
DOI	10.3847/1538-4357/abbd40
产权排序	10
英文摘要	Intensity scintillations of radio pulsars are known to originate from interference between waves scattered by the electron density irregularities of interstellar plasma, often leading to parabolic arcs in the two-dimensional power spectrum of the recorded dynamic spectrum. The degree of arc curvature depends on the distance to the scattering plasma and its transverse velocity with respect to the line of sight. We report the observation of annual and orbital variations in the curvature of scintillation arcs over a period of 16 yr for the bright millisecond pulsar, PSR J0437-4715. These variations are the signature of the relative transverse motions of Earth, the pulsar, and the scattering medium, which we model to obtain precise measurements of parameters of the pulsar's binary orbit and the scattering medium itself. We observe two clear scintillation arcs in most of our >5000 observations, and we show that they originate from scattering by thin screens located at distances D-1 = 89.8 0.4 pc and D-2 = 124 3 pc from Earth. The best-fit scattering model we derive for the brightest arc yields the pulsar's orbital inclination angle, i = 1371 03, and longitude of ascending node, omega = 2063 04. Using scintillation arcs for precise astrometry and orbital dynamics can be superior to modeling variations in the diffractive scintillation timescale, because the arc curvature is independent of variations in the level of turbulence of interstellar plasma. This technique can be used in combination with pulsar timing to determine the full three-dimensional orbital geometries of binary pulsars and provides parameters essential for testing theories of gravity and constraining neutron star masses.
URL标识	查看原文
资助项目	Commonwealth Government ; Australian Research Council[FL150100148] ; Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav)[CE170100004] ; NASA
WOS关键词	EXTREME SCATTERING EVENTS ; GENERAL-RELATIVITY ; PARABOLIC ARCS ; TURBULENCE ; VELOCITY ; TESTS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000592344300001
资助机构	Commonwealth Government ; Australian Research Council ; Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav) ; NASA
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3722]
专题	脉冲星研究团组
通讯作者	Reardon, Daniel J.
作者单位	1.Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia 2.CSIRO Sci Comp Serv, Australian Technol Pk,Locked Bag 9013, Alexandria, NSW 1435, Australia 3.Manly Astrophys, 15-41-42 East Esplanade, Manly, NSW 2095, Australia 4.Auckland Univ Technol, Inst Radio Astron & Space Res, Private Bag 92006, Auckland 1142, New Zealand 5.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 6.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100101, Peoples R China 7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 8.Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia 9.Australian Res Council, Ctr Excellence Gravitat Wave Discovery OzGrav, Canberra, ACT, Australia 10.Univ Calif San Diego, Elect & Comp Engn, La Jolla, CA USA
推荐引用方式 GB/T 7714	Reardon, Daniel J.,Coles, William A.,Bailes, Matthew,et al. Precision Orbital Dynamics from Interstellar Scintillation Arcs for PSR J0437-4715[J]. ASTROPHYSICAL JOURNAL,2020,904(2):104.
APA	Reardon, Daniel J..,Coles, William A..,Bailes, Matthew.,Bhat, N. D. Ramesh.,Dai, Shi.,...&Zhu, Xing-Jiang.(2020).Precision Orbital Dynamics from Interstellar Scintillation Arcs for PSR J0437-4715.ASTROPHYSICAL JOURNAL,904(2),104.
MLA	Reardon, Daniel J.,et al."Precision Orbital Dynamics from Interstellar Scintillation Arcs for PSR J0437-4715".ASTROPHYSICAL JOURNAL 904.2(2020):104.