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No apparent superluminal motion in the first-known jetted tidal disruption event Swift J1644+5734
Yang, J.1,2,3; Paragi, Z.3; van der Horst, A. J.4; Gurvits, L. I.3,5; Campbell, R. M.3; Giannios, D.6; An, T.2,7; Komossa, S.8
2016-10-11
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume462Issue:1Pages:L66-L70
AbstractThe first-known tidal disruption event (TDE) with strong evidence for a relativistic jet - based on extensive multiwavelength campaigns - is Swift J1644+5734. In order to directly measure the apparent speed of the radio jet, we performed very long baseline interferometry (VLBI) observations with the European VLBI network (EVN) at 5 GHz. Our observing strategy was to identify a very nearby and compact radio source with the real-time e-EVN, and then utilize this source as a stationary astrometry reference point in the later five deep EVN observations. With respect to the in-beam source FIRST J1644+5736, we have achieved a statistical astrometric precision about 12 mu as (68 per cent confidence level) per epoch. This is one of the best phase-referencing measurements available to date. No proper motion has been detected in the Swift J1644+5734 radio ejecta. We conclude that the apparent average ejection speed between 2012.2 and 2015.2 was less than 0.3c with a confidence level of 99 per cent. This tight limit is direct observational evidence for either a very small viewing angle or a strong jet deceleration due to interactions with a dense circum-nuclear medium, in agreement with some recent theoretical studies.
KeywordGalaxies: Individual: Swift j1644+5734 Galaxies: Jets Radio Continuum: Galaxies
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnrasl/slw107
WOS KeywordSUPERMASSIVE BLACK-HOLE ; RELATIVISTIC JET ; VLBI OBSERVATIONS ; PROPER MOTION ; RADIO ; J164449.3+573451 ; AFTERGLOW ; OUTBURST ; BIRTH ; STAR
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000383516700014
PublisherOXFORD UNIV PRESS
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23626
Collection中国科学院紫金山天文台
Corresponding AuthorYang, J.
Affiliation1.Chalmers, Onsala Space Observ, Dept Earth & Space Sci, SE-43992 Onsala, Sweden
2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
3.Joint Inst VLBI ERIC JIVE, Postbus 2, NL-7990 AA Dwingeloo, Netherlands
4.George Washington Univ, Dept Phys, 725 21st St NW, Washington, DC 20052 USA
5.Delft Univ Technol, Dept Astrodynam & Space Missions, NL-2629 HS Delft, Netherlands
6.Purdue Univ, Dept Phys & Astron, 525 Northwestern Ave, W Lafayette, IN 47907 USA
7.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
8.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
Recommended Citation
GB/T 7714
Yang, J.,Paragi, Z.,van der Horst, A. J.,et al. No apparent superluminal motion in the first-known jetted tidal disruption event Swift J1644+5734[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,462(1):L66-L70.
APA Yang, J..,Paragi, Z..,van der Horst, A. J..,Gurvits, L. I..,Campbell, R. M..,...&Komossa, S..(2016).No apparent superluminal motion in the first-known jetted tidal disruption event Swift J1644+5734.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,462(1),L66-L70.
MLA Yang, J.,et al."No apparent superluminal motion in the first-known jetted tidal disruption event Swift J1644+5734".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 462.1(2016):L66-L70.
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