IIA Institutional Repository

Kinematics of and emission from helically orbiting blobs in a relativistic magnetized jet

Show simple item record

dc.contributor.author Mohan, Prashanth
dc.contributor.author Mangalam, A
dc.date.accessioned 2020-11-12T14:33:42Z
dc.date.available 2020-11-12T14:33:42Z
dc.date.issued 2015-07-01
dc.identifier.citation The Astrophysical Journal, Vol. 805, No. 2, 91 en_US
dc.identifier.issn 0004-637X
dc.identifier.uri http://prints.iiap.res.in/handle/2248/6928
dc.description Restricted Access © IOP Publishing http://dx.doi.org/10.1088/0004-637X/805/2/91 en_US
dc.description.abstract We present a general relativistic (GR) model of jet variability in active galactic nuclei due to orbiting blobs in helical motion along a funnel or cone-shaped magnetic surface anchored to the accretion disk near the black hole. Considering a radiation pressure driven flow in the inner region, we find that it stabilizes the flow, yielding Lorentz factors ranging between 1.1 and 7 at small radii for reasonable initial conditions. Assuming these as inputs, simulated light curves (LCs) for the funnel model include Doppler and gravitational shifts, aberration, light bending, and time delay. These LCs are studied for quasi-periodic oscillations (QPOs) and the power spectral density (PSD) shape, and yield an increased amplitude (∼12%), a beamed portion and a systematic phase shift with respect to that from a previous special relativistic model. The results strongly justify implementing a realistic magnetic surface geometry in Schwarzschild geometry to describe effects on emission from orbital features in the jet close to the horizon radius. A power-law-shaped PSD with a typical slope of −2 and QPOs with timescales in the range of (1.37–130.7) days consistent with optical variability in blazars, emerges from the simulations for black hole masses M M • = −× (0.5 5) 10 ⊙ 8 and initial Lorentz factors γ = −2 10 jet,i . The models presented here can be applied to explain radio, optical, and X-ray variability from a range of jetted sources including active galactic nuclei, X-ray binaries, and neutron stars en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Accretion, accretion disks en_US
dc.subject Black hole physics en_US
dc.subject BL Lacertae objects: general en_US
dc.subject Galaxies: active en_US
dc.subject Galaxies: jets en_US
dc.subject Pulsars: general en_US
dc.title Kinematics of and emission from helically orbiting blobs in a relativistic magnetized jet en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account