Results 1 to 10 of about 1,920,958 (265)
On determination of the cosmic ray flux using molecular hydrogen absorption lines [PDF]
Serbian Astronomical Journal, 2003 We outline a procedure for estimating the cosmic ray flux at remote locations where molecular hydrogen absorption lines have been detected. The method relies on several assumptions whose validity in the local Galactic ISM has been independently verified,
Ćirković Milan M., Damjanov I.
doaj +1 more source
Polarization Transfer Rates by Isotropic Collisions between Astrophysical SiO Molecule and Electrons
Universe, 2022 We are interested in quantum calculations of polarization transfer (PT) rates due to collisions of the SiO molecule with the electrons. We determine the inelastic PT rates associated to the transitions: X 1Σ+→3Π; X 1Σ+→3Σ+; X 1Σ+→3Δ; X 1Σ+→3Σ−.
Moncef Derouich +3 more
doaj +1 more source
Cosmic-Ray Induced Diffusion in Interstellar Ices
Open Astronomy, 2014 Cosmic rays are able to heat interstellar dust grains. This may enhance molecule mobility in icy mantles that have accumulated on the grains in dark cloud cores.
Kalvāns Juris
doaj +1 more source
The Effect of an Inert Solid Reservoir on Molecular Abundances in Dense Interstellar Clouds
Open Astronomy, 2012 The question, what is the role of freeze-out of chemical species in determining the molecular abundances in the interstellar gas is a matter of debate.
Kalvāns Juris, Shmeld Ivar
doaj +1 more source
Hydrogen Bonds and Life in the Universe
Life, 2018 The scientific community is allocating more and more resources to space missions and astronomical observations dedicated to the search for life beyond Earth.
Giovanni Vladilo, Ali Hassanali
doaj +1 more source
Frontiers in Plant Science, 2015 Alternanthera philoxeroides is an amphibious invasive weed that can colonize both aquatic and terrestrial habitats. Individuals growing in different habitats exhibit extensive phenotypic variation but little genetic differentiation. Little is known about
Lexuan eGao +5 more
doaj +1 more source
Cold Stress, Freezing Adaptation, Varietal Susceptibility of Olea europaea L.: A Review
Plants, 2022 Olive (Olea europaea L.) is an evergreen xerophytic tree characterizing vegetative landscape and historical-cultural identity of the Mediterranean Basin.
Raffaella Petruccelli +7 more
doaj +1 more source
UV irradiation of ethanol-containing interstellar ice analogs
Astronomy & AstrophysicsContext. Ethanol (CH3CH2OH) has been detected in interstellar ices within regions associated with the early stages of star and planet formation. Because of its ability to form through multiple gas- and solid-phase pathways, ethanol is found in a range of
DeVine J. A. +5 more
doaj +1 more source
Chemistry and ro-vibrational excitation of CH+ in the planetary nebula NGC 7027
Astronomy & AstrophysicsContext. Small carbon hydride cations, such as methylidynium (CH+), are important in the chemistry of the interstellar medium. They participate in a network of gas-phase reactions with a range of molecular and atomic species and lead to the formation of ...
Sil M. +7 more
doaj +1 more source
Slow-electron-triggered chemistry in interstellar methanol-water ices
Astronomy & AstrophysicsWater and, to a lesser extent, methanol are widespread in interstellar space as ices, where sustained exposure to ionizing radiation promotes the formation of complex compounds such as prebiotic molecules via multi-step reactions.
Abdoul-Carime H., Kopyra J.
doaj +1 more source