Search for chaos in neutron star systems: Is Cyg X-3 a black hole?
Data(s) |
01/01/2010
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Resumo |
The accretion disk around a compact object is a nonlinear general relativistic system involving magnetohydrodynamics. Naturally, the question arises whether such a system is chaotic (deterministic) or stochastic (random) which might be related to the associated transport properties whose origin is still not confirmed. Earlier, the black hole system GRS 1915+105 was shown to be low-dimensional chaos in certain temporal classes. However, so far such nonlinear phenomena have not been studied fairly well for neutron stars which are unique for their magnetosphere and kHz quasi-periodic oscillation (QPO). On the other hand, it was argued that the QPO is a result of nonlinear magnetohydrodynamic effects in accretion disks. If a neutron star exhibits chaotic signature, then what is the chaotic/correlation dimension? We analyze RXTE/PCA data of neutron stars Sco X-1 and Cyg X-2, along with the black hole Cyg X-1 and the unknown source Cyg X-3, and show that while Sco X-1 and Cyg X-2 are low dimensional chaotic systems, Cyg X-1 and Cyg X-3 are stochastic sources. Based on our analysis, we argue that Cyg X-3 may be a black hole. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/25341/1/15.pdf Karak, Bidya Binay and Dutta, Jayanta and Mukhopadhyay, Banibrata (2010) Search for chaos in neutron star systems: Is Cyg X-3 a black hole? In: Astrophysical Journal, 708 (1). pp. 862-867. |
Publicador |
Institute of Physics |
Relação |
http://arxiv.org/abs/0911.1701 http://eprints.iisc.ernet.in/25341/ |
Palavras-Chave | #Physics |
Tipo |
Journal Article PeerReviewed |