We report here the discovery of a 30 ′′-chain of embedded Herbig-Haro (HH) objects in the ρ Ophiuchi dark cloud. These HH objects were first detected during a deep KS-band observation (completeness magnitude for point source∼19) made with NTT/SOFI. We confirm their nature with follow-up observations made with H2 v=1–0 S(1) narrow-band filter. We argue that they belong to two different jets eman...

– 2 – We present 3-D numerical hydrodynamical simulations of precessing supersonic heavy jets to explore their evolution, how they differ from straight jets and how well they serve as a model for generating molecular outflows from Young Stellar Objects. The dynamics are studied with a number of high resolution simulations on a Cartesian grid (128x128x128 zones) using a high order finite differe...

New early release observations of the Cepheus E outflow and its embedded source, obtained with the Spitzer Space Telescope, are presented. We show the driving source is detected in all 4 IRAC bands, which suggests that traditional Class 0 classification, although essentially correct, needs to accommodate the new high sensitivity infrared arrays and their ability to detected deeply embedded sour...

We mapped the inner 40 ′′ of the HH212 Class 0 outflow in SiO(2–1), SiO(5–4) and continuum using the Plateau de Bure interferometer in its extended configurations. The unprecedented angular resolution (down to 0. 34) allows accurate comparison with a new, deep H2 image obtained at the VLT. The SiO emission is confined to a highly-collimated bipolar jet (width ∼ 0. 35) along the outflow axis. Th...

Relativistic outflows are a common phenomenon in accreting black holes. Despite the enormous differences in scale, stellar-mass black holes in binaries and supermassive black holes in Galactic Nuclei produce jets with analogous properties. In both are observed two types of relativistic outflows: 1) steady compact jets with flat-spectrum, and 2) sporadic extended jets with steep-spectrum and app...

We present observations of outflows in the star-forming region NGC 1333 using the Combined Array for Research in Millimeter-Wave Astronomy (CARMA). We combined the CO and CO (10) CARMA mosaics with data from the 14-m Five College Radio Astronomy Observatory (FCRAO) to probe the central, most dense and active region of this protostellar cluster at scales from 5′′ to 7′ (or 1000 AU to 0.5 pc at a...

We report the discovery of a dozen Herbig-Haro jets illuminated by the Lyman continuum (λ < 912Å) and/or softer far-ultraviolet (912Å < λ < 2000Å) radiation fields of nearby high mass stars. Five irradiated outflows lie in the outer parts of the Orion Nebula (HH 502 through HH 506) and seven lie near the reflection nebula NGC 1333 in the Perseus molecular cloud (HH 333 through HH 336, and HH 49...

Observations made with the VLBA have led to fundamental advances in our understanding of how radio jets in AGN evolve from parsec-scales out to distances exceeding several hundred kiloparsecs. In this review I discuss current models of young radio source evolution, as well as the observational evidence for a rapid change in jet properties on scales of ∼ 1 kpc. A central topic of current debate ...

We present multi-dimensional simulations of magnetized radiative jets appropriate to Young Stellar Objects. Magnetized jets subject to collisionally excited radiative losses have not, as yet, received extensive scrutiny. The purpose of this letter is to articulate the propagation dynamics of radiative MHD jets in the context of the extensive jet literature. Most importantly, we look for morphol...

Abstract Ranging from a few pc to hundreds of kpc in size, radio jets have, during their evolution, an impact on gaseous environment large range scales. While effect larger scales is well established, it now becoming clear that they can also strongly affect the interstellar medium (ISM) inside host galaxy. Particularly important initial phase ( years) evolution jet, when expand into inner Here ...