Results 31 to 40 of about 35,251 (238)
The Simons Observatory: Galactic Science Goals and Forecasts
Observing in six frequency bands from 27 to 280 GHz over a large sky area, the Simons Observatory (SO) is poised to address many questions in Galactic astrophysics in addition to its principal cosmological goals.
Brandon S. Hensley+33 more
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Diffusion-desorption ratio of adsorbed CO and CO$_2$ on water ice [PDF]
Diffusion of atoms and molecules is a key process for the chemical evolution in the star forming regions of the interstellar medium. Accurate data on the mobility of many important interstellar species is however often not available and this provides a ...
Cuppen, H. M., Karssemeijer, L. J.
core +3 more sources
The SPHEREx Target List of Ice Sources (SPLICES)
One of the primary objectives of the SPHEREx mission is to understand the origin of molecules such as H _2 O, CO _2 , and other volatile compounds at the early stages of planetary system formation.
Matthew L. N. Ashby+18 more
doaj +1 more source
Interstellar processes: Ortho/para conversion, radiative association, and dissociative recombination
The study of the ortho-to-para ratio of assorted gas-phase interstellar molecules such as H2, H2O, NH3, and H2O+ has gained interest in recent years, based partially on new spectral observations of light hydrides by the Herschel Space Observatory ...
Herbst Eric
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One of the stumbling blocks for studying the evolution of interstellar molecules is the lack of adequate knowledge of the rate co-efficients of various reactions which take place in the Interstellar medium and molecular clouds.
Ankan Das+16 more
core +1 more source
Molecular Hydrogen Formation via Vibrational Excitation of Partially Superhydrogenated Pyrenes
While polycyclic aromatic hydrocarbons (PAHs) are now accepted to be abundant in interstellar space, the abundance and influence of superhydrogenated PAHs (HPAHs) in the interstellar medium (ISM) are still under investigation.
Frederik Doktor S. Simonsen+6 more
doaj +1 more source
Is Phenylnitrene a Missing Link in the Formation of Polycyclic Aromatic Nitrogen Heterocycles?
A new formation pathway for polycyclic aromatic nitrogen heterocycles (PANHs) has been found. The reaction of phenylnitrene and the propargyl radical leads to quinoline, proving that nitrenes are suitable precursors for nitrogen incorporation mechanisms.
Rahel Arns+6 more
wiley +1 more source
Abundance Ratios of OH/CO and HCO+/CO as Probes of the Cosmic-Ray Ionization Rate in Diffuse Clouds
The cosmic-ray ionization rate (CRIR, ζ _2 ) is one of the key parameters controlling the formation and destruction of various molecules in molecular clouds. However, the current most commonly used CRIR tracers, such as ${{\rm{H}}}_{3}^{+}$ , OH ^+ , and
Gan Luo+8 more
doaj +1 more source
Synthetic Approaches to Complex Organic Molecules in the Cold Interstellar Medium
The observation and synthesis of organic molecules in interstellar space is one of the most exciting and rapidly growing topics in astrochemistry.
Eric Herbst+3 more
doaj +1 more source
Interstellar hydrides -- that is, molecules containing a single heavy element atom with one or more hydrogen atoms -- were among the first molecules detected outside the solar system.
Gerin, Maryvonne+2 more
core +2 more sources