Results 91 to 100 of about 35,251 (238)

C5H9N Isomers: Pointers to Possible Branched Chain Interstellar Molecules

, 2017
The astronomical observation of isopropyl cyanide further stresses the link between the chemical composition of the ISM and molecular composition of the meteorites in which there is a dominance of branched chain amino acids as compared to the straight ...
Arunan, Elangannan, Das, Ankan, Etim, Emmanuel E., Gorai, Prasanta   +3 more
core   +1 more source

The ALCHEMI Atlas: Principal Component Analysis Reveals Starburst Evolution in NGC 253

The Astrophysical Journal Supplement Series
Molecular lines are powerful diagnostics of the physical and chemical properties of the interstellar medium (ISM). These ISM properties, which affect future star formation, are expected to differ in starburst galaxies from those of more quiescent ...
Nanase Harada, David S. Meier, Sergio Martín, Sebastien Muller, Kazushi Sakamoto, Toshiki Saito, Mark D. Gorski, Christian Henkel, Kunihiko Tanaka, Jeffrey G. Mangum, Susanne Aalto, Rebeca Aladro, Mathilde Bouvier, Laura Colzi, Kimberly L. Emig, Rubén Herrero-Illana, Ko-Yun Huang, Kotaro Kohno, Sabine König, Kouichiro Nakanishi, Yuri Nishimura, Shuro Takano, Víctor M. Rivilla, Serena Viti, Yoshimasa Watanabe, Paul P. van der Werf, Yuki Yoshimura   +26 more
doaj   +1 more source

Studies of interstellar vibrationally-excited molecules [PDF]

Several molecules thus far have been detected in the ISM in vibrationally-excited states, including H2, SiO, HC3N, and CH3CN. In order for vibrational-excitation to occur, these species must be present in unusually hot and dense gas and/or where strong ...
Erickson, N. R., Snell, R. L., Ziurys, L. M.   +2 more
core   +1 more source

The 15N-enrichment in dark clouds and Solar System objects

, 2013
The line intensities of the fundamental rotational transitions of H13CN and HC15N were observed towards two prestellar cores, L183 and L1544, and lead to molecular isotopic ratios 140 6 14N/15N 6 250 and 140 6 14N/15N 6 360, respectively.
Bonal, Lydie, Faure, Alexandre, Hily-Blant, Pierre, Quirico, Eric   +3 more
core   +2 more sources

Interstellar Dust and the H₂ Molecule [PDF]

, 1965
Karl‐Heinz Schmidt
openalex   +1 more source

Interstellar Molecules on Dust Mantles [PDF]

Symposium - International Astronomical Union, 1980
Condensation temperatures of various interstellar molecules in dark clouds are calculated. Chemical reactions in dust mantles are discussed.
openaire   +2 more sources

Interstellar grain chemistry and organic molecules [PDF]

The detection of prominant infrared absorption bands at 3250, 2170, 2138, 1670 and 1470 cm(-1) (3.08, 4.61, 4.677, 5.99 and 6.80 micron m) associated with molecular clouds show that mixed molecular (icy) grain mantles are an important component of the ...
Allamandola, L. J., Sandford, S. A.
core   +1 more source

Study of Potential Interstellar Molecules: Nuclear Quadrupole Coupling Constants of the Nitrogen Atom in Pyrrole [PDF]

, 1974
K. Bolton, RD Brown
openalex   +1 more source

Non-equilibrium processes in interstellar molecules [PDF]

The types of nonequilibrium emission and absorption by interstellar molecules are summarized. The observed brightness emission temperatures of compact OH and H2O sources are discussed using the concept of maser amplification.
Strelnitskiy, V. S.
core   +1 more source

Optical Observations of Interstellar Molecules [PDF]

Symposium - International Astronomical Union, 1980
Recent observational data are summarized on molecular species in diffuse interstellar clouds, and a comprehensive list of all species detected or sought is included. The discussion is focussed on the use of molecular observations to determine physical conditions in clouds, and on important species which provide constraints on cloud chemistry models ...
openaire   +2 more sources