Results 131 to 140 of about 793,175 (240)
The Astrophysical JournalEnols represent highly reactive intermediates toward the synthesis of complex organic molecules in the interstellar medium (ISM) and serve as key tracers of nonequilibrium chemistry driven by Galactic cosmic rays.
Michela Nonne +10 more
doaj +1 more source
The isotopic abundances of interstellar oxygen
The Astrophysical Journal, 1981 The relative abundance of /sup 17/O and /sup 18/O is found to be remarkably uniform in the giant molecular clouds of our Galaxy, varying by less than approx.5% between the galactic center and the most distant (approx.12 kpc) sources. This uniformity is seen to reflect the close similarity in the galactic distributions of the processes by which these ...
openaire +1 more source
Dust-evacuated Zones near Massive Stars: Consequences of Dust Dynamics on Star-forming Regions
The Astrophysical JournalStars form within dense cores composed of both gas and dust within molecular clouds. However, despite the crucial role that dust plays in the star formation process, its dynamics is frequently overlooked, with the common assumption being a constant ...
Nadine H. Soliman +2 more
doaj +1 more source
The Interstellar Heritage of Comets
The Astronomical JournalComets have similar compositions to interstellar medium ices, suggesting at least some of their molecules may be inherited from an earlier stage of evolution.
Karen Willacy +7 more
doaj +1 more source
The Astrophysical JournalWe present an analysis of the effects of spectral resolution and aperture scale on derived galaxy properties using far-ultraviolet (FUV) spectra of local star-forming galaxies from the International Ultraviolet Explorer ( R ∼ 250, field of view (FOV ...
Ilyse Clark +4 more
doaj +1 more source
Interstellar Abundances in the Magellanic Clouds
, 2001 6 pages, 5 figures, to appear in proceedings of IAP XVIIth Colloquium -- Gaseous Matter in Galaxies and Intergalactic Space (Paris; 2001 June), uses conf_iap ...
openaire +2 more sources
The Astronomical JournalWe present the initial results of the Measuring Extinction and Abundances of Dust project, with a focus on the dust extinction features observed in our JWST near- and mid-infrared spectra of nine diffuse Milky Way sightlines (1.2 ≤ A ( V ) ≤ 2.5).
Marjorie Decleir +5 more
doaj +1 more source
Interstellar Abundance of the Hydrogen Molecule.
The Astronomical Journal, 1962 Abstract : Contents: Mechanisms for the formulation of molecular hydrogen Dissociative processes for a static interstellar medium Dissociative effects of clouds motions Summary Appendix A: Photodissociation and photoionization Appendix B: Velocity distribution of H I clouds Appendix C: Stromgren spheres Appendix D: Problem in Brownian ...
openaire +1 more source
Discovery of MgS and NaS in the Interstellar Medium and Tentative Detection of CaO
The Astrophysical JournalWe report the first detection of the metal-bearing molecules sodium sulfide and magnesium sulfide and the tentative detection of calcium monoxide in the interstellar medium toward the Galactic center molecular cloud G+0.693-0.027.
Marta Rey-Montejo +14 more
doaj +1 more source