In the frame of unification schemes for radio-loud active galactic nuclei (AGNs), FR I radio galaxies are believed to be BL Lacertae (BL Lac) objects with the relativistic jet misaligned to our line of sight, and FR II radio galaxies correspond to misaligned radio quasars. The Ledlow-Owen dividing line for FR I/FR II dichotomy in the optical absolute magnitude of host galaxy–radio luminosity (M...

We examine the properties of central dust in nearby quiescent and active early-type galaxies. The active galaxies are low-power radio galaxies with Fanaroff & Riley Type I or I/II radio jets. We focus on (a) the comparison of the dust distributions in the active and quiescent galaxy samples and (b) the relation between the radio jet and dust orientations. Our main observational conclusions are:...

The properties of three-jet events with total transverse energy greater than 320 GeV and individual jet energy greater than 20 GeV have been analyzed and compared to absolute predictions from a next-to-leading order (NLO) perturbative QCD calculation. These data, of integrated luminosity 86 pb, were recorded by the CDF Experiment for pp collisions at √ s = 1.8 TeV. This study tests a model of h...

HH 399 is one of the first Herbig Haro flows recognized to be irradiated by the UV radiation of the massive O7.5 star in the Trifid nebula. We present the proper motion of the first irradiated jet based on two epochs of HST observations of HH 399 separated nearly by five years using Hα and [SII] line filters. High proper motion with continuous velocities between 200±55 and 528±24 km s −1 are de...

We study two-dimensional incompressible turbulence on the beta plane and propose a modification to the Rhines scale that takes into account the bottom friction. The modified Rhines scale is studied numerically, and found to predict accurately the jet number and the energy peak of the beta-plane turbulence for strong beta. The intermediate cases show a transition from the (isotropic) friction sc...

We present new results on 2-particle azimuthal (∆φ) correlation relative to event plane and 3particle pseudorapidity (∆η) correlation at mid-rapidity in Au+Au collisions at √ sNN = 200 GeV, measured by the STAR experiment. While jet-like correlation is symmetric, ridge is found to be asymmetric when trigger particle azimuth is between inand out-of-plane. The charge ordering properties between a...

In this paper we discuss the recent advances in the quantitative comparison of accretion, and the accretion:jet coupling, in accreting black holes in both X-ray binaries (where MBH ∼ 10M⊙) and Active Galactic Nuclei (105 ≤ MBH ≤ 109). These similarities include the radiative efficiency and jet power as a function of accretion rate, which are themselves probably the origin of the ‘fundamental pl...

Flow characteristics are presented of simulation results of plane impinging jets at high nozzle-plate distances, with two k-ω based hybrid RANS/LES (Reynolds Averaged Navier–Stokes/Large–Eddy Simulation) models and a k-ω RANS model. The first hybrid RANS/LES model is obtained by substitution of the turbulent length scale by the local grid size in the destruction term of the turbulent kinetic en...

Jet systems with two unequal components interact with their parent accretion disks through the asymmetric removal of linear momentum from the star-disk system. We show that as a result of this interaction, the disk’s state of least energy is not made up of orbits that lie in a plane containing the star’s equator as in a disk without a jet. The disk’s profile has the shape of a sombrero curved i...