Results 21 to 30 of about 35,391 (195)

The chemistry of interstellar molecules containing the halogen elements [PDF]

open access: yes, 2009
Although they are only minor constituents of the interstellar medium, halogen-containing molecules are of special interest because of their unique thermochemistry. Here, we present a theoretical study of the chemistry of interstellar molecules containing
Neufeld, David A., Wolfire, Mark G.
core   +1 more source

Complex Reactive Acids from Methanol and Carbon Dioxide Ice: Glycolic Acid (HOCH2COOH) and Carbonic Acid Monomethyl Ester (CH3OCOOH)

open access: yesThe Astrophysical Journal, 2023
The formation of complex organic molecules by simulated secondary electrons generated in the track of galactic cosmic rays was investigated in interstellar ice analogs composed of methanol and carbon dioxide.
Joshua H. Marks   +5 more
doaj   +1 more source

The Role of Terahertz and Far-IR Spectroscopy in Understanding the Formation and Evolution of Interstellar Prebiotic Molecules

open access: yesFrontiers in Astronomy and Space Sciences, 2021
Stellar systems are often formed through the collapse of dense molecular clouds which, in turn, return copious amounts of atomic and molecular material to the interstellar medium.
Duncan V. Mifsud   +6 more
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

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

Gas-phase Chemistry in the Interstellar Medium: The Role of Laboratory Astrochemistry

open access: yesFrontiers in Astronomy and Space Sciences, 2022
“Who” and how? In this simple question the complexity of the interstellar chemistry is encapsulated. “Who” refers to what molecules are present in the interstellar medium (ISM) and “how” to the mechanisms that led to their formation.
Cristina Puzzarini
doaj   +1 more source

Survey of CH3NH2 and its Formation Process

open access: yesThe Astrophysical Journal, 2023
We present the observational results of a precursor of glycine, methylamine (CH _3 NH _2 ), together with methanol (CH _3 OH) and methanimine (CH _2 NH) for the high-mass star-forming regions NGC 6334I, G10.47+0.03, G31.41+0.3, and W51 e1/e2 using the ...
Taiki Suzuki   +9 more
doaj   +1 more source

A Complete HCN Survey of the Perseus Molecular Cloud

open access: yesThe Astrophysical Journal, 2023
We present a survey of the Perseus molecular cloud in the J = 1 → 0 transition of HCN, a widely used tracer of dense molecular gas. The survey was conducted with the CfA 1.2 m telescope, which at 89 GHz has a beamwidth of 11′ and a spectral resolution of
T. M. Dame, Charles J. Lada
doaj   +1 more source

The first results from the Herschel-HIFI mission [PDF]

open access: yes, 2012
This paper contains a summary of the results from the first years of observations with the HIFI instrument onboard ESA's Herschel space observatory. The paper starts by outlining the goals and possibilities of far-infrared and submillimeter astronomy ...
van der Tak, Floris
core   +8 more sources

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

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