Gas-Puff-Imaging (GPI) is a two dimensional diagnostic which measures the edge Dα light emission from a neutral D2 gas puff nears the outer mid-plane of NSTX. DEGAS 2 is a 3-D Monte Carlo code used to model neutral transport and atomic physics in tokamak plasmas. In this paper we compare measurements of the Dα light emission obtained by GPI on NSTX with DEGAS 2 simulations of Dα light emission ...

We report the detection of [Ne ii] emission at 12.81 m in four out of the six optically thick dust disks observed as part of the FEPS Spitzer Legacy program. In addition, we detect a H i (7Y6) emission line at 12.37 m from the source RX J1852.3 3700. Detections of [Ne ii] lines are favored by low mid-infrared excess emission. Both stellar X-rays and extreme ultraviolet (EUV) photons can suffici...

We report the detection of [Ne ii] emission at 12.81μm in four out of the six optically thick dust disks observed as part of the FEPS Spitzer Legacy program. In addition, we detect a H i(7-6) emission line at 12.37μm from the source RX J1852.3-3700. Detections of [Ne ii] lines are favored by low mid–infrared excess emission. Both stellar X–rays and extreme UV (EUV) photons can sufficiently ioni...

In order to examine how narrow emission-line flux ratios depend on the Seyfert type, we compiled various narrow emission-line flux ratios of 355 Seyfert galaxies from the literature. We present in this paper that the intensity of the high-ionization emission lines, [Fe vii]λ6087, [Fe x]λ6374 and [Ne v]λ3426, tend to be stronger in Seyfert 1 galaxies than in Seyfert 2 galaxies. In addition to th...

Methane and nitrous oxide emissions from a fully covered municipal wastewater treatment plant were measured on-line during 16 months. At the plant under study, nitrous oxide contributed three-quarters to the plant's carbon footprint, while the methane emission was slightly larger than the indirect carbon dioxide emission related to the plant's electricity and natural gas consumption. This contr...

Context. Previous Spitzer and IRAS observations of the LMC suggest an excess of FIR emission with respect to the gas surface density traced by 12CO rotational emission lines and H i 21 cm emission. This so-called “FIR excess” is especially noticeable near molecular clouds in the LMC, and has usually been interpreted as indicating the presence of a self-shielded H2 component not traced by CO in ...

Context. The dusty debris disk around the ∼20 Myr old main-sequence A-star β Pictoris is known to contain gas. Evidence points towards a secondary origin of the gas as opposed to being a direct remnant from the initial protoplanetary disk, although the dominant gas production mechanism is so far not identified. The origin of the observed overabundance of C and O compared with solar abundances o...

A two-dimensionally imaging spectrometer system was employed to measure spatial variations in the intensities of emission lines in a Cu-Mn-Ni alloy sample when they were excited from a laser-induced plasma with krypton gas. The emission zone of these lines shrank and had greater emission intensities with increasing gas pressure, and the intensities of their background also became more intense. ...

We have observed several infrared-luminous galaxies which are in the process of merging (Mkn 231, Arp 299, NGC 6240, NGC 520, and IRAS 17208-0014) at 1.2mm with the multi-channel bolometer at the IRAM 30-meter telescope. Such observations of the long-wavelength thermal dust emission provide an alternative to CO as a measure of the gas mass. Comparing the masses of gas determined from the dust e...

By a Computational Fluid Dynamics software named Fluent, the influence that the permeability, gas emission intensity of goaf and turbulent parameters in working face have on the numerical simulation was studied. The results show that: the permeability and gas emission intensity of goaf have great influence on the migration law of gas and goaf air leakage, causing great impact on the gas concent...