Revisiting LS I+61 degrees 303 with VLBI astrometry

doi:10.1093/mnras/stx3003

NTSC-IR

	Revisiting LS I+61 degrees 303 with VLBI astrometry
	Wu, Y. W.1,2; Torricelli-Ciamponi, G.3; Massi, M.4; Reid, M. J.5; Zhang, B.6; Shao, L.7; Zheng, X. W.8
	2018-03-01
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
卷号	474 期号:3 页码:4245-4253
摘要	We conducted multi-epoch Very Long Baseline Array (VLBA) phase-referenced observations of LS I + 61 degrees 303 in order to study its precessing radio jet. Compared to similar observations in 2006, we find that the observed elliptical trajectory of emission at 8.4 GHz repeats after the 9 yr gap. The accurate alignment of the emission patterns yields a precession period of 26.926 +/- 0.005 d, which is consistent with that determined by Lomb-Scargle analysis of the radio light curve. We analytically model the projection on the sky plane of the peak position of a precessing, synchrotron-emitting jet, which traces an elliptical trajectory on the sky. Comparing the simulation with the VLBA astrometry we improve our knowledge of the geometry of the system. We measure the LS I + 61 degrees 303 absolute proper motion to be -0.150 +/- 0.006 mas yr(-1) eastward and -0.264 +/- 0.006 mas yr(-1) northward. Removing Galactic rotation, this reveals a small, < 20 km s(-1), non-circular motion, which indicates a very low kick velocity when the black hole was formed.
关键词	stars: jets gamma-rays: stars radio continuum: stars X-rays: binaries X-rays: individual: LS I+61 degrees 303
DOI	10.1093/mnras/stx3003
关键词[WOS]	BLACK-HOLE MASS ; MICROQUASAR LS-I+61-303 ; PROPER MOTIONS ; GRO J1655-40 ; RADIO ; EMISSION ; ORIGIN ; SS-433 ; DARK
语种	英语
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000424347900105
出版者	OXFORD UNIV PRESS
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/11531
专题	中国科学院国家授时中心
通讯作者	Wu, Y. W.; Torricelli-Ciamponi, G.; Massi, M.
作者单位	1.Natl Astron Observ Japan, Osawa 2-21-1, Mitaka, Tokyo 1818588, Japan 2.Chinese Acad Sci, Key Lab Precise Positioning & Timing Technol, Natl Time Serv Ctr, Xian 710600, Shaanxi, Peoples R China 3.INAF Osservatorio Astrofis Arcetri, Lgo E Fermi 5, I-50125 Florence, Italy 4.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 5.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA 6.Shanghai Astron Observ, 80 Nandan Rd, Shanghai 20030, Peoples R China 7.Albert Einstein Inst, Max Planck Inst Gravitat Phys, Muhlenberg 1, D-14476 Potsdam, Germany 8.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wu, Y. W.,Torricelli-Ciamponi, G.,Massi, M.,et al. Revisiting LS I+61 degrees 303 with VLBI astrometry[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,474(3):4245-4253.
APA	Wu, Y. W..,Torricelli-Ciamponi, G..,Massi, M..,Reid, M. J..,Zhang, B..,...&Zheng, X. W..(2018).Revisiting LS I+61 degrees 303 with VLBI astrometry.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,474(3),4245-4253.
MLA	Wu, Y. W.,et al."Revisiting LS I+61 degrees 303 with VLBI astrometry".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 474.3(2018):4245-4253.