Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"interstellar clouds"”.
-
Rotational equilibrium of C2 in interstellar clouds
… of the rotational equilibrium of C2 in interstellar clouds is updated. It is critical for this equilibrium to be well understood if C2 is to be used as a probe of the physical conditions in these clouds. Although new data continues to be published, the model was last updated in 1987. In …
-
Ambipolar Diffusion in Interstellar Clouds: One-Dimensional, Isothermal Collapse
… smaller than fluxes of corresponding masses at interstellar densities. The detailed calculations of collapsing model clouds described in this paper show that the flux-to-mass ratio in cloud cores can decrease by more than 4 orders of magnitude at neutral densities n(,n) < 10('9) cm('-3) due to …
-
Ambipolar diffusion in interstellar clouds: One-dimensional, isothermal collapse
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-09T14:05:17Z No. of bitstreams: 1 1983_paleologou.pdf: 2881441 bytes, checksum: 2daf79df8e0b48e52a8eeda9a54d11bd (MD5)
-
Internal Excitations of Stored Triatomic Hydrogen Molecular Ions
… of the cornerstones of molecular processes in interstellar clouds. The dissociative electron recombination (DR) of H3+ is much studied, but still subject to a long-standing controversy. Modern ion storage rings equipped with electron coolers provide a relatively clean environment for DR …
-
Stacking the Gamma-ray Sky to Search for Faint Astrophysical Populations
… flares to pulsating neutron stars, and from interstellar clouds to the center of the Milky Way Galaxy. Entering the 13th year of its orbit around Earth, the Fermi Space Gamma-ray Telescope has been continually surveying the γ-ray sky with its Large Area Telescope (LAT) on board. The latest …
-
Structures and Reactivities of Ionized and Metal Cation-Containing Acetylene Clusters
… ion-molecule reactions suspected to occur in interstellar clouds and other interplanetary bodies.A combination of ion mobility measurements, collision induced dissociation (CID), and theoretical calculations are used to provide the most conclusive evidence for the frequently hypothesized …
-
The nuclear spin dependence of the reaction of H3+ with H2 and the proposed spectroscopic investigation of HO2+
… in biological processes such as respiration, as interstellar species, and as species found in terrestrial and extraterrestrial atmospheres. Although extensive research has been devoted to study these species and their reactions, scientists have barely ``scratched the surface'' in the realm of …
-
Development of a quantum cascade laser based spectrometer for high-resolution spectroscopy of gas phase C60
… pathway for the synthesis of benzene in dense interstellar clouds and protoplanetary nebulae. As a molecule of astrophysical insterest, it presents a future target for high-resolution spectroscopy in the McCall group using the sensitive cooled resolved ion beam spectroscopy technique. A full PI …
-
Planet formation, resonant drag instabilities, and vortices
… stars, the torii of active galactic nuclei and interstellar clouds – and the SI. We were already able to make quantitative predictions about those two phenomenas, so my real contribution is to explain how they work. The picture I offer will help evaluate how those instabilities respond to …