![]() ![]() Radial distributions of surface mass density and mass-to-luminosity ratio in spiral galaxies Thus, the validity of the equations of state for copper and the conductivity model used in the simulations was confirmed for the parameters of the exploding wire realized in the present research. Also, the radial density distribution obtained by an inverse Abel transform analysis agrees with the results of these simulations. Magneto-hydrodynamic simulation shows a good agreement between the simulated and experimental waveforms of the current and voltage and measured the radial expansion of the exploding wire. The conductivity of copper was evaluated for a temperature of 10 kK and found to be in good agreement with the data obtained in earlier experiments where only electrical and optical diagnostics were applied. In the present research, a flash X-ray source of 20 ns pulse-width and >60 keV photon energy was used. Time- and space-resolved evolution of the density (down to 0.07 of solid state density) of a copper wire during its microsecond timescale electrical explosion in water was obtained by X-ray backlighting. Radial density distribution of a warm dense plasma formed by underwater electrical explosion of a copper wire Initial analysis of approximately 190 days suggests that the energization of relativistic electrons may result from a more complicated combination of radial transport and in-situ acceleration than is usually assumed. The fact that detected electrons with given 1st and 2nd adiabatic invariants can cover L*~6-10, allows tracing the temporally evolving radial gradient which can help in determining the source of new electrons. Data in this work are from the IES and HIST electron detectors on board POLAR, whose orbit crosses the outer part of outer radiation belt through equatorial plane almost every 18 hours during this period. Here we expand on the results of earlier event studies by surveying the phase space density radial distribution and its temporal evolution during storms for a time period of 2 years (2001-2002). Recent work has focused on analysis of phase space density distribution for specific storms of interest. To address this question, we first need to differentiate between two competing mechanisms, inward radial transport or in-situ energization. The source of relativistic electrons in the Earth's radiation belts in recovery phase of geomagnetic storms is still an open question which requires more observational analysis. ![]() While not having made an extensive comparison of different density profiles, we find that the overall radial density distribution within molecular cloud cores is adequately described by an attenuated power law.« lessĪ Survey of Phase Space Density Radial Distribution of Relativistic Electrons During a 2-year Time Period (2001-2002) We derive the method analytically, test it numerically, and illustrate its utility using 2MASS-derived dust extinction in molecular cloud cores. Our method may be applied to many types of astronomical objectsmore » and observable quantities so long as they satisfy a limited set of conditions, which we describe in detail. Instead, it exploits contour self-similarity in column density maps, which appears to be common in data for astronomical objects. The method presented here does not assume any geometry for the object being studied, thus removing a significant source of bias. ![]() Such profiles are often critical to understand the physics and chemistry of molecular cloud cores, in which star formation takes place. KrÄo, Marko Goldsmith, Paul F., E-mail: present a geometry-independent method for determining the shapes of radial volume density profiles of astronomical objects whose geometries are unknown, based on a single column density map. GEOMETRY-INDEPENDENT DETERMINATION OF RADIAL DENSITY DISTRIBUTIONS IN MOLECULAR CLOUD CORES AND OTHER ASTRONOMICAL OBJECTS Strong similarities in morphology and general physical conditions were found to exist among all of the southern clouds in the sample. The radial density distribution of the clouds with central luminosity sources was determined observationally. Several 1.0 continuum mapping observations were made of seven southern hemisphere h12/molecular cloud complexes with 65 arcsec resolution. 1.0 Mm Maps and Radial Density Distributions of Southern Hii/molecular Cloud ComplexesĬheung, L. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |