Results 51 to 60 of about 42,575 (298)

Hot and Diffuse Clouds near the Galactic Center Probed by Metastable H3+

, 2005
Using an absorption line from the metastable (J, K) = (3, 3) level of H3+ together with other lines of H3+ and CO observed along several sightlines, we have discovered a vast amount of high temperature (T ~ 250 K) and low density (n ~ 100 cm-3) gas with ...
Arimoto N., Benjamin J. McCall, Binney J., Brown R. L., Butchart I., Dahmen G., Geballe T. R., Goto M., Greaves J. S., Greaves J. S., Gusten R., Gusten R., Gusten R., Hartquist T. W., Hartquist T. W., Huttemeister S., Kaifu N., Koyama K., Liszt H. S., Mauersberger R., Miwa Goto, Oesterling L. C., Oka T., Oka T., Sofue Y., Takeshi Oka, Thomas R. Geballe, Tomonori Usuda, van Woerden H., Whiteoak J. B., Wilson T. L., Wright M. C. H.   +31 more
core   +2 more sources

FUSE Observations of Molecular Hydrogen in Translucent Interstellar Clouds: The Line of Sight Toward HD 73882 [PDF]

, 2000
We report the results of initial FUSE observations of molecular hydrogen (H2) in translucent clouds. These clouds have greater optical depth than any of the diffuse clouds previously observed for far-UV H2 absorption, and provide new insights into the ...
A. Lecavelier, A. Vidal-Madjar, B-G Andersson, B. D. Savage, B. L. Rachford, C. Gry, D. C. Morton, D. E. Welty, D. G. York, de Boer K. S., E. B. Jenkins, Federman S. R., Gredel R., H. W. Moos, J. M. Shull, J. Tumlinson, K. R. Sembach, M. Lemoine, Mason K. O., P. D. Feldman, R. Ferlet, Richter P., S. D. Friedman, T. P. Snow, W. P. Blair   +24 more
core   +3 more sources

Interstellar shocks and molecular CH/+/ in diffuse clouds

The Astrophysical Journal, 1980
The influence of shocks on the abundances of molecules in diffuse interstellar clouds is investigated with special emphasis on molecular CH/sup +/. Idealized shocks with plausible parameters are found to produce column densities for CH/sup +/ in the hot, postshock gas which are comparable with measured values in interstellar clouds (up to about 10/sup ...
M. Elitzur, W. D. Watson
openaire   +1 more source

Gravitational instability of filamentary molecular clouds, including ambipolar diffusion [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
The gravitational instability of a filamentary molecular cloud in non-ideal magnetohydrodynamics is investigated. The filament is assumed to be in hydrostatic equilibrium. We add the effect of ambipolar diffusion to the filament which is threaded by an initial uniform axial magnetic field along its axis. We write down the fluid equations in cylindrical
Hosseinirad, Mohammad, Naficy, Kazem, Abbassi, Shahram, Roshan, Mahmood   +3 more
openaire   +2 more sources

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

Advanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong, Changfan Xu, Huaping Zhao, Yong Lei   +3 more
wiley   +1 more source

The Distribution of Metallicities in the Local Galactic Interstellar Medium

The Astrophysical Journal, 2023
In this investigation, we present an analysis of the metallicity distribution that pertains to neutral gas in the local Galactic interstellar medium (ISM).
Adam M. Ritchey, Edward B. Jenkins, J. Michael Shull, Blair D. Savage, S. R. Federman, David L. Lambert   +5 more
doaj   +1 more source

H2 distribution during formation of multiphase molecular clouds

, 2015
H2 is the simplest and the most abundant molecule in the ISM, and its formation precedes the formation of other molecules. Understanding the dynamical influence of the environment and the interplay between the thermal processes related to the formation ...
Gérin, Maryvonne, Hennebelle, Patrick, Lesaffre, Pierre, Valdivia, Valeska   +3 more
core   +3 more sources

IC 3418: Star Formation in a Turbulent Wake [PDF]

, 2010
Galaxy Evolution Explorer observations of IC 3418, a low surface brightness galaxy in the Virgo Cluster, revealed a striking 17 kpc UV tail of bright knots and diffuse emission. H alpha imaging confirms that star formation is ongoing in the tail. IC 3418
Bigiel, Chung, Chung, Crowl, Ferguson, Gavazzi, Gavazzi, Hunter, Kenney, Kenney, Kennicutt, Kirby, Lee, Mamon, Martin, Martin, McLaughlin, Mei, Nulsen, Padoan, Salim, Schindler, Sun, Sun, Thilker, Tonnesen, Wyder, York, Yoshida, Yoshida   +29 more
core   +4 more sources

The Behavior of Selected Diffuse Interstellar Bands with Molecular Fraction in Diffuse Atomic and Molecular Clouds [PDF]

The Astrophysical Journal, 2017
Abstract We study the behavior of eight diffuse interstellar bands (DIBs) in different interstellar environments, as characterized by the fraction of hydrogen in molecular form (f H2), with comparisons to the corresponding behavior of various known atomic and molecular species. The equivalent widths of the five “normal”
Haoyu Fan, Daniel E. Welty, Donald G. York, Paule Sonnentrucker, Julie A. Dahlstrom, Noah Baskes, Scott D. Friedman, Lewis M. Hobbs, Zihao Jiang, Brian Rachford, Theodore P. Snow, Reid Sherman, Gang Zhao   +12 more
openaire   +2 more sources

Z‐Scheme Water Splitting Systems Based on Solid‐State Electron Conductors

Advanced Functional Materials, EarlyView.
This review examines the latest advances in Z‐scheme overall water splitting (OWS) systems for solar hydrogen production. These systems consist of suspended or immobilized hydrogen evolution photocatalysts (HEPs) and oxygen evolution photocatalysts (OEPs).
Chen Gu, Takashi Hisatomi, Tsuyoshi Takata, Kazunari Domen   +3 more
wiley   +1 more source