Effect of plasma composition on magnetized outflows

Singh, Kuldeep; Chattopadhyay, Indranil

doi:10.1093/mnras/stz1072

Cited by 7 publications

(5 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8 & 9. Dependence of flow velocity and temperature on the composition of the flow, has also been shown in the hydrodynamic regime recently (Chattopadhyay & Ryu 2009;Vyas & Chattopadhyay 2019;Singh & Chattopadhyay 2019). Therefore, it is expected that some imprint of the flow composition should be there in radiative output of the flow.…”

Section: Solutions For Different Plasma Compositions (ξ)mentioning

confidence: 82%

Study of relativistic magnetized outflows with relativistic equation of state

Singh

Chattopadhyay

2019

Monthly Notices of the Royal Astronomical Society

Self Cite

View full text Add to dashboard Cite

We study relativistic magnetized outflows using relativistic equation of state having variable adiabatic index (Γ) and composition parameter (ξ). We study the outflow in special relativistic magneto-hydrodynamic regime, from sub-Alfvénic to super-fast domain. We showed that, after the solution crosses the fast point, magnetic field collimates the flow and may form a collimation-shock due to magnetic field pinching/squeezing. Such fast, collimated outflows may be considered as astrophysical jets. Depending on parameters, the terminal Lorentz factors of an electron-proton outflow can comfortably exceed few tens.We showed that due to the transfer of angular momentum from the field to the matter, the azimuthal velocity of the outflow may flip sign. We also study the effect of composition (ξ) on such magnetized outflows. We showed that relativistic outflows are affected by the location of the Alfvén point, the polar angle at the Alfvén point and also the angle subtended by the field lines with the equatorial plane, but also on the composition of the flow. The pair dominated flow experiences impressive acceleration and is hotter than electron proton flow.

show abstract

Section: Solutions For Different Plasma Compositions (ξ)mentioning

confidence: 82%

Study of relativistic magnetized outflows with relativistic equation of state

Singh

Chattopadhyay

2019

Monthly Notices of the Royal Astronomical Society

Self Cite

View full text Add to dashboard Cite

show abstract

“…CR EoS is a very close fit to the exact one given by Chandrasekhar (1939). The CR has already been used for different astrophysical problems (Cielo et al 2014;Singh & Chattopadhyay 2019;Sarkar et al 2020;Joshi et al 2021Joshi et al , 2022.…”

Section: Assumptions and Governing Equationsmentioning

confidence: 99%

Shocks in radiatively driven time dependent, relativistic jets around black holes

Joshi¹,

Debnath²,

Chattopadhyay³

2022

Preprint

Self Cite

View full text Add to dashboard Cite

We study time-dependent relativistic jets under the influence of radiation field of the accretion disk. The accretion disk consists of an inner compact corona and an outer sub-Keplerian disk. The thermodynamics of the fluid is governed by a relativistic equation of state (EoS) for multispecies fluid which enables to study the effect of composition on jet-dynamics. Jets originate from the vicinity of the central black hole where the effect of gravity is significant and traverses large distances where only special relativistic treatment is sufficient. So we have modified the flat metric to include the effect of gravity. In this modified relativistic framework we have developed a new total variation diminishing (TVD) routine along with multispecies EoS for the purpose. We show that the acceleration of jets crucially depends on flow composition. All the results presented are transonic in nature, starting from very low injection velocities, the jets can achieve high Lorentz factors. For sub-Eddington luminosities, lepton dominated jets can be accelerated to Lorentz factors > 50. The change in radiation field due to variation in the accretion disk dynamics will be propagated to the jet in a finite amount of time. Hence any change in radiation field due to a change in disk configuration will affect the lower part of the jet before it affects the outer part. This can drive shock transition in the jet flow. Depending upon the disk oscillation frequency, amplitude and jet parameters these shocks can collide with each other and may trigger shock cascades.

show abstract

“…Vyas et al (2015) showed that CR EoS approximates the exact EoS (Chandrasekhar 1939) very well. CR EoS has been used in variety of astrophysical problems (Joshi et al 2021;Sarkar et al 2020;Singh & Chattopadhyay 2019;Vyas & Chattopadhyay 2019;Cielo et al 2014). The EoS is given as…”

Section: Equation Of Statementioning

confidence: 99%

Radiatively driven, time dependent bipolar outflows

Joshi,

Chattopadhyay,

Yadav

2021

Preprint

Self Cite

View full text Add to dashboard Cite

We study the radiatively driven fluid jets around a non-rotating black hole. The radiation arising from the inner compact corona and outer sub-Keplerian part of the disc accelerates the jets. We obtain the steady state, semi-analytical, radiatively driven outflow solutions. The thermodynamics of the outflow is described by a variable adiabatic index equation of state. We develop a TVD routine to investigate the time dependent behaviour of the radiatively driven bipolar outflow. We inject with flow variables from the steady state outflow solutions in the TVD code and allow the code to settle into steady state and match the numerical results with the steady state solution. The radiation arising out of the accretion disc can provide a wide range of jet solutions, depending upon parameters like the intensity of disc, location of the inner corona etc. We induce the time dependence of the radiation field by inducing oscillation of the inner corona of the accretion disc. The radiation field then makes the bipolar outflow time dependent. We show that a non-steady radiation field arising out of disc oscillations can generate the internal shocks closer to the jet base. Depending on the disc geometry, there might be transient shocks in the jet and there might be multiple non-stationary shocks in the jet, which are of much interest in jet physics.

show abstract

Effect of plasma composition on magnetized outflows

Cited by 7 publications

References 35 publications

Study of relativistic magnetized outflows with relativistic equation of state

Study of relativistic magnetized outflows with relativistic equation of state

Shocks in radiatively driven time dependent, relativistic jets around black holes

Radiatively driven, time dependent bipolar outflows

Contact Info

Product

Resources

About