Chaotic Feature in the Light Curve of 3C 273

Liu, Lei

doi:10.1088/1009-9271/6/6/04

Cited by 4 publications

(5 citation statements)

References 17 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Being nearby (z=0.158), the jet of 3C 273 which was the first quasar discovered (Schmidt 1963) has been studied extensively from the radio (e.g., Conway et al 1993), infrared (e.g., Jester et al 2005;Uchiyama et al 2006, hereafter U06;Jester et al 2007, hereafter J07;Wen et al 2002), optical (e.g., Jester et al 2001;2005;Lin 2006;Qian 2001), to the X-rays (e.g., Marshall et al 2001;Sambruna et al 2001, hereafter S01;Jester et al 2006, hereafter J06). Chaotic feature in the light curve of 3C 273 is also discussed by Liu (2006). A TeV flux upper limit has also been obtained by shallow High Energy Stereoscopic System (H.E.S.S.)…”

Section: Introductionmentioning

confidence: 78%

A modified stratified model for the 3C 273 jet

Liu

Shen

2009

Res. Astron. Astrophys.

View full text Add to dashboard Cite

We present a modified stratified jet model to interpret the observed spectral energy distributions of knots in 3C 273 jet. Based on the hypothesis of the single index of the particle energy spectrum at injection and identical emission processes among all the knots, the observed difference of spectral shape among different 3C273 knots can be understood as a manifestation of deviation of the equivalent Doppler factor of stratified emission regions in individual knot from a characteristic one. The summed spectral energy distribution of all the ten knots in 3C 273 jet can be well fitted by two components, low-energy (radio to optical) component dominated by the synchrotron radiation and high-energy component (UV, X-ray and γ-ray) dominated by the inverse Compton scattering of the cosmic microwave background. This gives a consistent spectral index of α = 0.88 (S ν ∝ ν −α ) and a characteristic Doppler factor of 7.4. Assuming the average of the summed spectrum as the characteristic spectrum of each knot in the 3C273 jet, we further get a distribution of Doppler factor. We discuss the possible implications of these results for the physical properties in 3C 273 jet. Future GeV observations with GLAST could separate the γ-ray emission of 3C 273 from the large scale jet and the small scale jet (i.e. the core) through measuring the GeV spectrum.

show abstract

Section: Introductionmentioning

confidence: 78%

A modified stratified model for the 3C 273 jet

Liu

Shen

2009

Res. Astron. Astrophys.

View full text Add to dashboard Cite

show abstract

“…In this paper we propose a non-linear accretion disk model (NAD) which can be used to describe the chaotic behavior observed in the light curve of quasar 3C 273 (Liu 2006). We note that the tangential velocity of accretion disk is influenced by two factors.…”

Section: Discussionmentioning

confidence: 99%

“…We have used the above-mentioned diagnostic methods to analyze the optical light curve of 3C 273, and found that its eccentric behavior may be a low-dimensional chaos (Liu 2006). This result tells us that non-linear may play a very important role in the nature of quasar.…”

mentioning

confidence: 93%

Chaotic behavior in accretion disks

Liu

2008

Astrophys Space Sci

Self Cite

View full text Add to dashboard Cite

The eccentric luminosity variations of quasars are still a mystery. Analytic results of this behavior ranged from multi-periodic behavior to a purely random process. Recently, we have used the non-linear time-series analysis techniques to analyze the optical light curve of 3C 273 and found that its eccentric behavior may be a low-dimensional chaos. This result induces us to seek some non-linear mechanism for the eccentric luminosity variation. In this paper, we propose a simple non-linear accretion disk model and find that under some circumstances, the chaos appears both in the disk and in the light curve. Then we compute the outburst energy I , defined by the difference between the maximum luminosity and the minimum luminosity, and the mean luminosity I and find that when chaos appears, I ∼ I α ∼ M 0.5α , where M is the mass of black hole and α ≈ 1. These results are confirmed by and/or compatible with the observational data analysis.

show abstract

“…In this paper we propose a non-linear accretion disk model (NAD) which can be used to describe the chaotic behavior observed in the light curve of quasar 3C 273 [16]. We note that the tangential velocity of accretion disk is influenced by two factors.…”

Section: Discussionmentioning

confidence: 99%

“…These techniques constitute a useful diagnostic method of chaos in practical systems. Therefore, the above-mentioned diagnostic methods have been used to analyze the light curve of 3C 273, and it has been found that the eccentric luminosity variation of 3C 273 may be a kind of chaotic behavior [16]. This result tells us that non-linear may play a very important role in the nature of quasar.…”

Section: Introductionmentioning

confidence: 99%

Chaotic behavior in the accretion disk

Lei,

Fei

2007

Preprint

View full text Add to dashboard Cite

The eccentric luminosity variation of quasars is still a mystery. Analytic results of this behavior ranged from multi-periodic behavior to a purely random process. Recently, we have used nonlinear time-series analysis to analyze the light curve of 3C 273 and found its eccentric behavior may be chaos [L. Liu, Chin. J. Astron. Astrophys. 6, 663 (2006)]. This result induces us to look for some nonlinear mechanism to explain the eccentric luminosity variation. In this paper, we propose a simple non-linear accretion disk model and find it shows a kind of chaotic behavior under some circumstances. Then we compute the outburst energy △F , defined as the difference of the maximum luminosity and the minimum luminosity, and the mean luminosity F . We find that △F ∼ F α in the chaotic domain, where α ≈ 1. In this domain, we also find that F ∼ M 0.5 , where M is the mass of central black hole. These results are confirmed by or compatible with some results from the observational data analysis [A.

show abstract

Chaotic Feature in the Light Curve of 3C 273

Cited by 4 publications

References 17 publications

A modified stratified model for the 3C 273 jet

A modified stratified model for the 3C 273 jet

Chaotic behavior in accretion disks

Chaotic behavior in the accretion disk

Contact Info

Product

Resources

About