In this paper, the Hartree-Fock method has been formulated to investigate some of the ground state properties of quasi-one-dimensional interacting electron gas in the presence of the magnetic field. The bare coulomb interaction between electrons has been assumed. For this system, we have also computed some of its thermodynamic and magnetic properties such as the energy, pressure, incompressibil...

February 5, 2008 Two sets of data show that small interstellar grains captured in interstellar magnetic fields, → BIS, draped over the heliosphere appear to polarize the light of nearby stars. The polarizing grains couple to → BIS, while larger grains couple to the cloud velocity. The maximum polarization direction, Pmax, is offset in ecliptic longitude by ∆λ ∼ +35 from the upwind direction, an...

Abstract Continuum polarization over the UV-to-microwave range is due to dichroic extinction (or emission) by asymmetric, aligned dust grains. Scattering can also be an important source of polarization, especially at short wavelengths. Because both grain alignment and scattering physics, wavelength dependence generally, traces size Similarly because differing dependencies two generally reliably...

It is established that the formation of rotationally supported disks during the main accretion phase of star formation is suppressed by a moderately strong magnetic field in the ideal MHD limit. Non-ideal MHD effects are expected to weaken the magnetic braking, perhaps allowing the disk to reappear. We concentrate on one such effect, ambipolar diffusion, which enables the field lines to slip re...

Interstellar magnetic fields exist over a broad range of spatial scales, extending from the large Galactic scales (∼ 10 kpc) down to the very small dissipative scales (≪ 1 pc). In this paper, we use a set of 490 pulsars distributed over roughly one third of the Galactic disk out to a radius R ≃ 10 kpc (assuming R⊙ = 8.5 kpc) and combine their observed rotation and dispersion measures with their...

background: with increased use of computers, exposure to electric and magnetic fields is increasing, the main objective of this study was to evaluate the electric and magnetic field strength in portable computers (laptops) and its relation with eyestrain users. methods: in this cross – sectional study, magnetic and electric fields in 125 laptop computers were measured from 30 cm and 50 cm dista...

The collapse and fragmentation of initially filamentary, magnetic molecular clouds is calculated in three dimensions with a gravitational, radiative hydrodynamics code. The code includes magnetic field effects in an approximate manner: magnetic pressure, tension, braking, and ambipolar diffusion are all modelled. The parameters varied are the ratio of the ambipolar diffusion time to the free fa...

The interstellar medium (ISM) can be thought of as the galactic atmosphere which fills the space between stars. When clouds within the ISM collapse, stars are born. When the stars die, they return their matter to the surrounding gas. Therefore the ISM plays a vital role in galactic evolution. The medium includes starlight, gas, dust, planets , comets, asteroids, fast moving charged particles (c...

ABSTRACT Energy equipartition is a powerful theoretical tool for understanding astrophysical plasmas. It invoked, example, to measure magnetic fields in the interstellar medium (ISM), as evidence small-scale turbulent dynamo action, and, general, estimate energy budget of star-forming molecular clouds. In this study, we motivate and explore role volume-averaged root-mean-squared (rms) coupling ...