Results 31 to 40 of about 35,251 (238)

The Simons Observatory: Galactic Science Goals and Forecasts

open access: yesThe Astrophysical Journal, 2022
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
doaj   +1 more source

Diffusion-desorption ratio of adsorbed CO and CO$_2$ on water ice [PDF]

open access: yes, 2014
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)

open access: yesThe Astrophysical Journal, 2023
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

open access: yesEPJ Web of Conferences, 2015
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
doaj   +1 more source

Hydro-chemical study of the evolution of interstellar pre-biotic molecules during the collapse of molecular clouds

open access: yes, 2012
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

open access: yesThe Astrophysical Journal
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?

open access: yesAngewandte Chemie International Edition, EarlyView.
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

open access: yesThe Astrophysical Journal, 2023
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

open access: yesFrontiers in Astronomy and Space Sciences, 2022
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

open access: yes, 2016
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

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