Gas Accretion is Dominated by Warm Ionized Gas in Milky Way
... The grey histogram shows the amount of cold gas contained within 10 kpc of the four gas-rich satellites identified within the virial radius of the simulated host halo (see below for more details). We picked the radius of 10 kpc because it is at least 40% (and up to 100%) of the virial radii of the s ...
... The grey histogram shows the amount of cold gas contained within 10 kpc of the four gas-rich satellites identified within the virial radius of the simulated host halo (see below for more details). We picked the radius of 10 kpc because it is at least 40% (and up to 100%) of the virial radii of the s ...
Astrophysics with the Computer: Propagation of Ionization Fronts in
... time step) and computing time (shorter with larger time step). The method of solution of the ionization equation will be stable also at larger step widths. The evolution of an HII region reaches the equilibrium within the recombination time scale (trek ≈ 1/(ne α(H+ ). With ∆t = 0.01trek one reaches ...
... time step) and computing time (shorter with larger time step). The method of solution of the ionization equation will be stable also at larger step widths. The evolution of an HII region reaches the equilibrium within the recombination time scale (trek ≈ 1/(ne α(H+ ). With ∆t = 0.01trek one reaches ...
The role of black holes in galaxy formation and evolution
... iron, which retain their inner electrons even at high temperature, and by Compton scattering. Radiation pressure on ionised gas is only important in the immediate proximity of black holes, where it determines the Eddington limit, but radiation pressure on dust is important even on galactic scale bec ...
... iron, which retain their inner electrons even at high temperature, and by Compton scattering. Radiation pressure on ionised gas is only important in the immediate proximity of black holes, where it determines the Eddington limit, but radiation pressure on dust is important even on galactic scale bec ...
Studies of an inductively coupled negative hydrogen ion radio
... In the frame work of a development project for ITER neutral beam injection system a radio frequency (RF) driven negative hydrogen (H-/D-) ion source, (BATMAN ion source) is developed which is designed to produce several 10s of ampere of H-/D- beam current. This PhD work has been carried out to under ...
... In the frame work of a development project for ITER neutral beam injection system a radio frequency (RF) driven negative hydrogen (H-/D-) ion source, (BATMAN ion source) is developed which is designed to produce several 10s of ampere of H-/D- beam current. This PhD work has been carried out to under ...
... P450 producing the ultimate carcinogen benzo[a]pyrene7,8-diol-9,10-epoxide (BPDE). Among the substances found in nature, one of them is ellagic acid (EA), found most in red raspberries, which is capable of chemically reacting with the B[a]P metabolites and preventing the covalent binding of BPDE to ...
small free negative ions
... severe; they are principally the requirement of an appropriate negative ion source, of high intensity in the light beam and of moderately stability in the two sources. Discharges have proved to be satisfactory sources; constricting the discharge electrically, magnetically, or both can be used to giv ...
... severe; they are principally the requirement of an appropriate negative ion source, of high intensity in the light beam and of moderately stability in the two sources. Discharges have proved to be satisfactory sources; constricting the discharge electrically, magnetically, or both can be used to giv ...
Is an RFQ a good candidate for a next
... tradeoffs and choices must be made. • How much physics remains to be studied by low-voltage(<1 MV), low-current DC accelerators by the time this facility will be built? Will higher current accelerators be needed? • Although DE/E=10-4 is most desirable, would an accelerator that produced DE/E=10-3 be ...
... tradeoffs and choices must be made. • How much physics remains to be studied by low-voltage(<1 MV), low-current DC accelerators by the time this facility will be built? Will higher current accelerators be needed? • Although DE/E=10-4 is most desirable, would an accelerator that produced DE/E=10-3 be ...
11.1 Introduction
... enormous complexes of dust and gas, sufficiently dense to be self-shielding from the diffuse interstellar ultraviolet radiation field. Typical parameters are temperatures T ∼ 15 K, volume densities n = 100–300 cm−3 , and masses M = 105 –106 M . The low temperatures and high densities (and the prese ...
... enormous complexes of dust and gas, sufficiently dense to be self-shielding from the diffuse interstellar ultraviolet radiation field. Typical parameters are temperatures T ∼ 15 K, volume densities n = 100–300 cm−3 , and masses M = 105 –106 M . The low temperatures and high densities (and the prese ...
The Sun as an X-Ray Star. III. Flares
... heating very difficult : the Ñare starts when a low density plasma is heated at more than 107 K ; due to the low emission measure, initially the plasma is not easily observable while thermal conduction is so efficient that it smooths out in a few seconds any trace of local thermal perturbation. The ...
... heating very difficult : the Ñare starts when a low density plasma is heated at more than 107 K ; due to the low emission measure, initially the plasma is not easily observable while thermal conduction is so efficient that it smooths out in a few seconds any trace of local thermal perturbation. The ...
Periodic Spectral Line Asymmetries In Solar Coronal Structures From Slow Magnetoacoustic Waves
... - Damped over a short distance (thermal conduction) - In phase intensity and velocity perturbations [Wang et al. 2009] ...
... - Damped over a short distance (thermal conduction) - In phase intensity and velocity perturbations [Wang et al. 2009] ...
Microplasma
Microplasmas are plasmas of small dimensions, ranging from tens to thousands of micrometers. They can be generated at a variety of temperatures and pressures, existing as either thermal or non-thermal plasmas. Non-thermal microplasmas that can maintain their state at standard temperatures and pressures are readily available and accessible to scientists as they can be easily sustained and manipulated under standard conditions. Therefore, they can be employed for commercial, industrial, and medical applications, giving rise to the evolving field of microplasmas.