Essentially all high redshift galaxies show evidence for strong large-scale outflows that should have a profound effect on the structure and kinematics of both the galaxies themselves and their environments. The interstellar absorption spectra of both Lyman break galaxies (LBGs) and local starburst galaxies are remarkably similar to those of damped Lyα (DLA) systems in QSO spectra. Their rest-f...

VLBI observations of relativistic outflows (jets) in galactic nuclei, complemented with detailed studies made in other spectral domains, have become an effective tool for investigating the physics of nuclear regions in galaxies. High-resolution radio observations access directly the regions where the jets are formed, and trace their evolution and interaction with the nuclear environment. The em...

It is commonly accepted that jets have not been observed in cataclysmic variables (CVs) so far. This absence was recently explained by their low mass transfer rates compared with objects with jets. A mass accretion limit for jets in CVs was proposed to be Ṁ ∼ 10−7 − 10−6 M⊙/yr. There was, however, a report of evidence for jets in V1494 Aql, the second nova that erupted in Aquila in 1999. In thi...

We report on the detection of four rotating massive disks in two regions of high-mass star formation. The disks are perpendicular to known bipolar outflows and turn out to be unstable but long lived. We infer that accretion onto the embedded (proto)stars must proceed through the disks with rates of∼10 M⊙ yr . Subject headings: Stars: formation – Radio lines: ISM – ISM: molecules – ISM: individu...

Jets and outflows must be produced directly from accretion disks and inflows, especially when the central gravitating objects are compact, such as neutron stars and black holes, and themselves are not mass losing. Here, we review the formation of jets from advective inflows. We show that the centrifugal pressure supported boundary layer (CENBOL) of the black holes may play crucial role in produ...

We conducted VLA observations at 0.′′06 resolution of the 22 GHz water masers toward the Class 0 source S106 FIR (d = 600 pc; 15′′ west of S106-IRS4) on two epochs separated by ∼3 months. Two compact clusters of the maser spots were found in the center of the submillimeter core of S106 FIR. The separation of the clusters was ∼ 80 mas (48 AU) along P.A. = 70◦ and the size of each cluster was ∼20...

Emission line profiles from collimated high-velocity outflows or jets in planetary nebulae (PNe) have diverse characteristics that indicate the influence of binary cores and magnetic confinement mechanisms in their origin. In this contribution, a number of cases are presented that exemplify the complexity of these outflows in PNe.

Star formation is usually accompanied by outflow phenomena. There is strong evidence that these outflows and jets are launched from the protostellar disk by magneto-rotational processes. Here, we report on our three dimensional, adaptive mesh, magneto-hydrodynamic simulations of collapsing, rotating, magnetized Bonnor-Ebert-Spheres whose properties are taken directly from observations. In contr...

The physical characteristics of Cepheus E (Cep E) ‘embedded’ outflow are analyzed using ISOCAM images in the v=0-0 S(5) 6.91 μm and S(3) 9.66 μm molecular hydrogen lines. We find that the morphology of the Cep E outflow in the ground vibrational H2 lines is similar to that of the near infrared v=1-0 2.12 μm line. At these mid-IR wavelengths, we do not detect the second H2 outflow which is almos...

Using three-dimensional resistive MHD nested grid simulations, we investigate the driving mechanism of outflows and jets in star formation process. Starting with a Bonnor-Ebert isothermal cloud rotating in a uniform magnetic field, we calculated cloud evolution from the molecular cloud core (nc = 10 4 cm, r = 4.6×10 AU) to the stellar core (nc = 10 22 cm, r ∼ 1R⊙), where nc and r denote the cen...