Results 201 to 210 of about 4,742 (219)

A near-UV Spatial Heterodyne Spectrometer for Interstellar [OII] Emission Line Studies

Fourier Transform Spectroscopy/ Hyperspectral Imaging and Sounding of the Environment, 2007
Using a newly developed spatial heterodyne spectrometer, we have obtained the first radial velocity resolved observations of interstellar 3727 A emission and confirmed the superb performance of the technique for observing spatially extended faint sources.
E.J. Mierkiewicz, F.L. Roesler, J.M. Harlander, R.J. Reynolds, K.P. Jaehnig   +4 more
openaire   +1 more source

First detection of line emission from the hot interstellar medium with solid state detectors

Advances in Space Research, 1981
Previously reported enhanced soft X-ray emission from the North-Galactic Polar region supports the theory of a hot interstellar component. This paper reports the first detection of line emission from the hot interstellar component in the North-Galactic-Polar region.
H.W. Schnopper, J.P. Delvaille, R. Rocchia, C. Blondel, C. Chéron, J.C. Christy, R. Ducros, L. Koch, R. Rothenflug   +8 more
openaire   +1 more source

γ-ray line emissions as tracers of tenuous phases of the interstellar medium

AIP Conference Proceedings, 1988
γ‐ray line emissions, produced by e+ annihilations and the decay of 26Al, provide unique tools for probing on galactic scale the tenuous interstellar phase—the least understood component of the interstellar medium.
openaire   +1 more source

First light performance of a near-UV spatial heterodyne spectrometer for interstellar emission line studies

SPIE Proceedings, 2004
This paper describes the characteristics and performance of a novel spatial heterodyne spectrometer designed to measure the extremely faint [OII] 372.6 nm (λ3726 a) and 372.9 nm (λ3729 a) emission lines from the warm (10,000 K) ionized component of our Galaxy's interstellar medium.
Edwin J. Mierkiewicz, Fred L. Roesler, John M. Harlander, Ron J. Reynolds, Kurt P. Jaehnig   +4 more
openaire   +1 more source

Optical Emission Line Studies and the Warm Ionized Component of the Local Interstellar Medium

International Astronomical Union Colloquium, 1984
AbstractObservations of diffuse, galactic Hα, [NII]λ6583, and [SII]λ6716 emission lines provide evidence for a warm (~ 104 K), primarily ionized component of the interstellar medium distributed throughout the galactic disk. This component of the interstellar gas has an electron density ≈ 0.1-0.2 cm-3 and occupies about 10-30% of the interstellar volume.
openaire   +1 more source

Amplification by Stimulated Emission in Rydberg Matter Clusters as the Source of Intense Maser Lines in Interstellar Space

Astrophysics and Space Science, 2006
The detailed processes giving maser line radiation from various molecules in space are not well understood, as can be seen from many recent detailed studies of maser line emission with high spatial and velocity resolution, and with polarization measurements.
openaire   +1 more source

Origin of the Weak Plasma Emission Line Detected by Voyager 1 in the Interstellar Medium: Evidence for Suprathermal Electrons

Astrophysical Journal, 2021
D A Gurnett, W S Kurth, L F Burlaga
exaly  

Interstellar Polycyclic Aromatic Hydrocarbon Molecules

Annual Review of Astronomy and Astrophysics, 2008
A G G M Tielens
exaly  

Rotational Excitation of CO in the Diffuse Interstellar Medium: Effects of Line Emission from Dense Molecular Clouds

Astrophysical Journal, 1997
Bryan E Penprase, B-G Andersson
exaly  

Forbidden S II H-alpha intensity ratios in faint, extended H II regions and the origin of the interstellar emission-line background

Astrophysical Journal, 1988
R J Reynolds
exaly