Contemporaneous Multiwaveband Observations of Blazars

Marscher, A. P.; Bloom, S. D.; Zhang, Yun Fei; Gear, Walter Kieran

doi:10.1007/978-94-010-9537-2_19

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…• at least (Marscher et al 1992). We can also estimate the distance from the black hole at which the shock wave forms based on the time interval between the onset of the outburst in the two jets.…”

Section: Resultsmentioning

confidence: 99%

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Quasar jet emission model applied to the microquasar GRS 1915+105

Türler¹,

Courvoisier²,

Chaty³

et al. 2004

A&A

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Abstract. The true nature of the radio emitting material observed to be moving relativistically in quasars and microquasars is still unclear. The microquasar community usually interprets them as distinct clouds of plasma, while the extragalactic community prefers a shock wave model. Here we show that the synchrotron variability pattern of the microquasar GRS 1915+105 observed on 15 May 1997 can be reproduced by the standard shock model for extragalactic jets, which describes well the long-term behaviour of the quasar 3C 273. This strengthens the analogy between the two classes of objects and suggests that the physics of relativistic jets is independent of the mass of the black hole. The model parameters we derive for GRS 1915+105 correspond to a rather dissipative jet flow, which is only mildly relativistic with a speed of 0.60 c. We can also estimate that the shock waves form in the jet at a distance of about 1 AU from the black hole.

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Section: Resultsmentioning

confidence: 99%

“…• between the jet axis and the line of sight (Fender et al 1999) is such that the shock is likely to be viewed sideways for the approaching jet and from behind for the receding jet (Marscher et al 1992). This was taken into account in the modelling and results in a different observed evolution of the two jets (see Fig.…”

Section: Methodsmentioning

confidence: 99%

Quasar jet emission model applied to the microquasar GRS 1915+105

Türler¹,

Courvoisier²,

Chaty³

et al. 2004

A&A

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show abstract

“…intraday) variability observed at centimeter wavelengths in blazars, solving the problem of extremely high brightness tempratures and the requirement of extremely high bulk Lorentz factors (Γ > ∼ 100). Discussions on the application of the light-travel-time effect are referred to: Quirrenbach et al 1989, Qian et al 1991c, 1996a, Kraus et al 1999, 2003, Krichbaum et al 1991, 2002, Begelman et al 1994, Standke et al 1996, Marscher 1993, Marscher et al 1992, Gabuzda et al 1999, 1998, Kochanev & Gabuzda 1998, Wagner et al 1993, Witzel et al 1988.…”

Section: Doppler Boosting Effect and Flux Evolution Of Knot C9mentioning

confidence: 99%

Non-ballistic motion and precessing helical trajectory in quasar NRAO 150

Qian

2016

Res. Astron. Astrophys.

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NRAO 150 is a very special radio quasar in which prominent non-ballistic superluminal motion has been observed in its inner-jet region. We apply model-fittings to the kinematics of the superluminal knots (trajectory, distance from the core and apparent velocity) in terms of a helical precessing jet-nozzle model. Five cases are considered in which the angle between the jet axis and the line of sight is assumed to be 6 • , 3 • , 1 • , 0.6 • and 0.12 • , respectively. It is shown that the superluminal components have intrinsic acceleration in the innermost regions ( < ∼ 0.2 mas from the core). The phenomenon of precessing nozzle/trajectory can be understood on the basis of relativistic magnetohydrodynamic theories for relativistic jets.

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