Events such as atmospheric gas dispersion by industrial accidents or processes are generally predicted with Gaussian plumes, coupled with local models of gas emission. In this contribution we investigate the association of integral models of instantaneous emission with Gaussian dispersion processes for predicting the progression of potentially hazardous low-altitude emissions over sensitive or ...

We present a new treatment of two popular models for the growth of structure, examining the X-ray emission from hot gas with allowance for spectral line emission from various atomic species, primarily “metals”. The X-ray emission from the bright cluster sources is not significantly changed from prior work and, as noted earlier, shows the CDM+Λ model (LCDM) to be consistent but the standard, COB...

The first observations of the recently completed Wisconsin H-Alpha Mapper (WHAM) facility include a study of emission lines from high velocity clouds in the M, A, and C complexes, with most of the observations on the M I cloud. We present results including clear detections of Hα emission from all three complexes with intensities ranging from 0.06 to 0.20 R. In every observed direction where the...

We present a new treatment of two popular models for the growth of structure, examining the X-ray emission from hot gas with allowance for spectral line emission from various atomic species, primarily \metals". The X-ray emission from the bright cluster sources is not signi cantly changed from prior work and, as noted earlier, shows the CDM+ model (LCDM) to be consistent but the standard, COBE ...

VLA maps of ammonia emission were made for the Galactic Center region. The NH3(1,1) and NH3(2,2) transitions were observed in three 2 ×2 fields covering Sgr A and the region 3 immediately south of it. In the central 3 parsecs surrounding Sgr A we find emission which appears to be associated with the circumnuclear disk (CND), both morphologically and kinematically. This central emission is conne...

We report imaging of CO (2–1) emission in the nucleus of M51 at 1 (47 pc) resolution. Molecular gas is ′′ found closely associated with the nuclear radio jet and the X-shaped dust absorption feature seen in the Hubble Space Telescope images. The CO emission lies along the side of the nuclear radio continuum “jet.” The strongest molecular emission is not symmetric in either position or velocity ...

Simulations of greenhouse gas emission reductions from low-cost hybrid solar photovoltaic and cogeneration systems for new communities, Simulations of greenhouse gas emission reductions from low-cost hybrid solar photovoltaic and cogeneration systems for new communities, Abstract Recent work has shown that small-scale combined heat and power (CHP) and solar photovoltaic (PV) technologies have s...

Observations of H2 line emission have revealed higher-than-expected gas temperatures in a number of photodissociation fronts. We discuss the heating and cooling processes in photodissociation regions. Observations of NGC 2023 are compared to a theoretical model in which there is substantial gas at temperatures T = 500− 1000K heated by photoelectric emission and collisional deexcitation of H2. I...

We present SÍGAME simulations of the [Cii] 157.7μm fine structure line emission from cosmological smoothed particle hydrodynamics (SPH) simulations of seven main sequence galaxies at z = 2. Using sub-grid physics prescriptions the gas in our simulations is modeled as a multi-phased interstellar medium (ISM) comprised of molecular gas residing in giant molecular clouds, an atomic gas phase assoc...