Results 31 to 40 of about 2,097,454 (229)
CHIMIA, 1977 The parameters of the interstellar chemistry have been discussed: the cosmic abundance of elements, the mass and density of the gaseous component in the interstellar space, the temperature, the source of free energy, the stability of the molecules in ...
M. Taube
doaj +1 more source
The 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
Frontiers 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
Extraterrestrial prebiotic molecules: photochemistry vs. radiation chemistry of interstellar ices.
Chemical Society Reviews, 2019 In 2016, unambiguous evidence for the presence of the amino acid glycine, an important prebiotic molecule, was deduced based on in situ mass-spectral studies of the coma surrounding cometary ice.
Christopher R. Arumainayagam +9 more
semanticscholar +1 more source
Survey of CH3NH2 and its Formation Process
The 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
SYSTEMATIC THEORETICAL STUDY ON THE INTERSTELLAR CARBON CHAIN MOLECULES [PDF]
, 2016 In an effort to further our interest in understanding the basic chemistry of interstellar molecules, here we carry out an extensive investigation of the stabilities of interstellar carbon chains; Cn, H2Cn, HCnN and CnX (X = N, O, Si, S, H, P, H−, N ...
E. Etim +4 more
semanticscholar +1 more source
A Complete HCN Survey of the Perseus Molecular Cloud
The 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
Interstellar processes: Ortho/para conversion, radiative association, and dissociative recombination
EPJ 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
The SPHEREx Target List of Ice Sources (SPLICES)
The 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
Molecular Hydrogen Formation via Vibrational Excitation of Partially Superhydrogenated Pyrenes
The Astrophysical JournalWhile 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