Results 91 to 100 of about 49,075 (253)

H3+ in Diffuse Interstellar Clouds: A Tracer for the Cosmic-Ray Ionization Rate [PDF]

, 2007
Using high-resolution infrared spectroscopy we have surveyed twenty sight lines for H3+ absorption. H3+ is detected in eight diffuse cloud sight lines with column densities varying from 0.6 × 1014 to 3.9 × 1014 cm−2. This brings to 14 the total number of
N. Indriolo, T. Geballe, Takeshi Oka, B. J. McCall   +3 more
semanticscholar   +1 more source

Dynamically dominant magnetic fields in the diffuse interstellar medium

, 2009
Observations show that magnetic fields in the interstellar medium (ISM) often do not respond to increases in gas density as would be naively expected for a frozen-in field. This may suggest that the magnetic field in the diffuse gas becomes detached from
A. Shukurov, Andrew Fletcher, Beck, Beck, M. Korpi, Mestel   +5 more
core   +1 more source

Unusually Weak Diffuse Interstellar Bands toward HD 62542 [PDF]

, 2001
As part of an extensive survey of diffuse interstellar bands (DIBs), we have obtained optical spectra of the moderately reddened B5V star HD 62542, which is known to have an unusual UV extinction curve of the type usually identified with dark clouds. The
Adamson A. J., Benjamin J. McCall, Cami J., Daniel E. Welty, Donald G. York, Ehrenfreund P., Gredel R., Gredel R., Gredel R., Heger M. L., Jenniskens P., Jenniskens P., Jenniskens P., Julie Thorburn, Kerr T. H., Krelowski J., L. M. Hobbs, Leger A., Paule Sonnentrucker, Sarre P. J., Snow T. P., Snow T. P., Sonnentrucker P., Sonnentrucker P., Theodore P. Snow, van der Zwet G. P., Walker D. D.   +26 more
core   +3 more sources

Plasma Production by Laser Ablation of Heavy Metals

Contributions to Plasma Physics, Volume 65, Issue 7, August 2025.
ABSTRACT An Nd:YAG focused laser operating at 1064 nm, 3 ns pulse width, 360 mJ pulse energy, is employed to irradiate heavy metals, such as Ta, W, Pt, Au, and Pb. The in‐vacuum irradiation produces an expanding plasma at the target surface which has high density, temperature, and kinetic energy of emitted ions. Ions have a velocity of the order of 104 
L. Torrisi, M. Cutroneo, A. Torrisi
wiley   +1 more source

Iron and silicate dust growth in the Galactic interstellar medium: clues from element depletions [PDF]

, 2018
The interstellar abundances of refractory elements indicate a substantial depletion from the gas phase, that increases with gas density. Our recent model of dust evolution, based on hydrodynamic simulations of the lifecycle of giant molecular clouds ...
Dobbs, Clare, Henning, Thomas, Zhukovska, Svitlana   +2 more
core   +2 more sources

Interstellar Migration, the Population ‘Problem’ and the Climate Emergency

Critical Quarterly, EarlyView.
Anna Hartnell
wiley   +1 more source

The Origin of the Cluster of Local Interstellar Clouds

The Astrophysical Journal
The interstellar medium within ≈15 pc of the Sun consists of a complex of 15 diffuse, partially ionized clouds. Located within the Local Bubble, these clouds, known as the Cluster of Local Interstellar Clouds (CLIC), constitute the interstellar ...
Catherine Zucker, Seth Redfield, Sara Starecheski, Ralf Konietzka, Jeffrey L. Linsky   +4 more
doaj   +1 more source

Heteroatom-doped hydrogenated amorphous carbons, a-C:H:X 'Volatile' silicon, sulphur and nitrogen depletion, blue photoluminescence, diffuse interstellar bands and ferro-magnetic carbon grain connections (Research Note)

, 2013
Context. Hydrogenated amorphous carbons, a-C:H, can incorporate a variety of heteroatoms, which can lead to interesting effects. Aims. To investigate the doping of interstellar a-C:H grains with, principally, Si, O, N and S atoms within the astrophysical
Jones, A. P.
core   +1 more source

Herschel/HIFI observations of interstellar OH+ and H2O+ towards W49N: a probe of diffuse clouds with a small molecular fraction [PDF]

, 2010
We report the detection of absorption by interstellar hydroxyl cations and water cations, along the sight-line to the bright continuum source W49N.
A. Coutens, A. Cros, A. G. G. M. Tielens, A. Lorenzani, B. Godard, B. Mookerjea, Brogan, C. Gry, C. Joblin, C. Persson, C. Vastel, D. A. Neufeld, D. C. Lis, D. Teyssier, de Graauw, E. Dartois, E. Falgarone, E. Herbst, F. Boulanger, Fish, Gerin, Godard, Goicoechea, Gwinn, H. Gupta, Indriolo, J. Cernicharo, J. H. Black, J. Krełowski, J. Martín-Pintado, J. Pearson, J. R. Goicoechea, J. Stutzki, J. Zmuidzinas, K. Klein, K. M. Menten, Kre▯owski, L. A. Samoska, Le Petit, Le Petit, Liszt, M. De Luca, M. Gerin, M. Kazmierczak, M. Perault, M. Salez, M. Schmidt, Mürtz, Ossenkopf, P. Encrenaz, P. F. Goldsmith, P. Hennebelle, P. Hily-Blant, P. Rimmer, P. Sonnentrucker, Pilbratt, Plume, R. Kołos, R. Monje, R. Plume, R. Shipman, R. Szczerba, S. Philipp, S. Schlemmer, S. Yu, Sonnentrucker, Strahan, T. A. Bell, T. G. Phillips, T. Giesen, T. R. Geballe, Van der Werf, van Dishoeck, Vastel, Wehinger, Wyrowski   +75 more
core   +2 more sources

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source