Results 41 to 50 of about 31,252 (251)

Proton and Electron Irradiations of CH₄:H₂O Mixed Ices

Atoms, 2023
The organic chemistry occurring in interstellar environments may lead to the production of complex molecules that are relevant to the emergence of life. Therefore, in order to understand the origins of life itself, it is necessary to probe the chemistry ...
Duncan V. Mifsud, Péter Herczku, Béla Sulik, Zoltán Juhász, István Vajda, István Rajta, Sergio Ioppolo, Nigel J. Mason, Giovanni Strazzulla, Zuzana Kaňuchová   +9 more
doaj   +1 more source

Interstellar oxygen chemistry [PDF]

Astronomy & Astrophysics, 2001
We present results of chemical models for a variety of types of regions shown by SWAS observations to contain less O2 and H2O than previously expected. We identify time-dependent models for which O2 and H2O abundances meet the SWAS constraints and for which calculated abundances of other species are in harmony with measurements made primarily at ...
S. Viti, E. Roueff, T. W. Hartquist, null G. Pineau des Forêts, D. A. Williams   +4 more
openaire   +1 more source

Unusual Chemical Processes in Interstellar Chemistry: Past and Present

Frontiers in Astronomy and Space Sciences, 2021
The chemistry that occurs in interstellar clouds consists of both gas-phase processes and reactions on the surfaces of dust grains, the latter particularly on and in water-dominated ice mantles in cold clouds.
Eric Herbst, Eric Herbst
doaj   +1 more source

Modeling the processing of interstellar ices by energetic particles [PDF]

, 2013
Context. Interstellar ice is the main form of metal species in dark molecular clouds. Experiments and observations have shown that the ice is significantly processed after the freeze-out of molecules onto grains.
Kalvāns, Juris, Shmeld, Ivar
core   +1 more source

Cationic Noble-Gas Hydrides: From Ion Sources to Outer Space

Frontiers in Chemistry, 2020
Cationic species with noble gas (Ng)-hydrogen bonds play a major role in the gas-phase ion chemistry of the group 18 elements. These species first emerged more than 90 years ago, when the simplest HeH+ and HeH2+ were detected from ionized He/H2 mixtures.
Felice Grandinetti, Felice Grandinetti
doaj   +1 more source

Open questions on carbon-based molecules in space

Communications Chemistry, 2022
It has been a great joint achievement of astronomy, laboratory spectroscopy and quantum chemistry to identify interstellar molecules in various astronomical environments and piece together their origins story from the fragmented evidence.
Christopher S. Hansen, Els Peeters, Jan Cami, Timothy W. Schmidt   +3 more
doaj   +1 more source

Grain Surface Models and Data for Astrochemistry [PDF]

, 2017
The cross-disciplinary field of astrochemistry exists to understand the formation, destruction, and survival of molecules in astrophysical environments. Molecules in space are synthesized via a large variety of gas-phase reactions, and reactions on dust ...
A. Al-Halabi, A. Al-Halabi, A. Al-Halabi, A. Bacmann, A. Belloche, A. Belloche, A. Dalgarno, A. Dutrey, A. Leger, A. Lipshtat, A. McKellar, A. Nagaoka, A. Nagaoka, A. Pedersen, A. Rimola, A. Stutz, A. Tielens, A. Wolff, A.A. Boogert, A.E. Douglas, A.G.G.M. Tielens, A.G.G.M. Tielens, A.G.G.M. Tielens, A.I. Vasyunin, A.I. Vasyunin, A.S. Bolina, A.S. Bolina, A.S. Bolina, A.S. Eddington, A.V. Ivlev, B. Lepetit, B.T. Draine, B.T. Draine, C. Arasa, C. Arasa, C. Arasa, C. Chyba, C. Eckart, C. Vastel, C. Walsh, C. Walsh, C.M. Leung, D. Field, D. Hollenbach, D. McElroy, D. Semenov, D. Semenov, D.A. Adriaens, D.E. Woon, D.H. Parker, D.J. Hollenbach, D.P. Ruffle, D.P. Ruffle, D.R. Bates, D.T. Gillespie, E. Anders, E. Congiu, E. Gonzalez-Lavado, E. Herbst, E. Herbst, E. Herbst, E. Herbst, E. Herbst, E. M. Penteado, E. Wigner, E.A. Bergin, E.C. Fayolle, E.C. Fayolle, E.C. Fayolle, E.F. Dishoeck van, E.F. Dishoeck van, E.K. Campbell, E.M. Penteado, E.R. Batista, F. Dulieu, F. Mispelaer, F.L. Schöier, G. Cooper, G. Fedoseev, G. Nyman, G.A. Cruz-Diaz, G.A. Cruz-Diaz, G.A. Cruz-Diaz, G.M. Muñoz Caro, G.W. Fuchs, G.W. Fuchs, H. Chaabouni, H. Hidaka, H. Hidaka, H. Hidaka, H. Linnartz, H. M. Cuppen, H.J. Fraser, H.J. Fraser, H.M. Cuppen, H.M. Cuppen, H.M. Cuppen, J. Bossa, J. Cami, J. Cernicharo, J. Fillion, J. Gonzalez, J. He, J. He, J. Kalvāns, J. Koning, J. Kästner, J. Zhen, J.A. Noble, J.A. Noble, J.A. Noble, J.B. Bergner, J.B. Bossa, J.E. Elsila, J.K. Jørgensen, J.M.C. Rawlings, J.R. Burke, K. Acharyya, K. Acharyya, K. Furuya, K. Furuya, K. Hiraoka, K. Hiraoka, K. Hiraoka, K. Hiraoka, K. Isokoski, K. Kuwahata, K. Kvenvolden, K. Willacy, K. Willacy, K.I. Öberg, K.I. Öberg, K.I. Öberg, K.I. Öberg, K.I. Öberg, K.I. Öberg, K.I. Öberg, K.I. Öberg, K.J. Chuang, K.M. Pontoppidan, K.M. Pontoppidan, L. Allamandola, L. Amiaud, L.B. D’Hendecourt, L.B. D’Hendecourt, L.B. D’Hendecourt, L.E. Snyder, L.J. Karssemeijer, L.J. Karssemeijer, L.J. Karssemeijer, L.J. Karssemeijer, L.T. Greenberg, M. Accolla, M. Agúndez, M. Allen, M. Bertin, M. Bertin, M. Bertin, M. Minissale, M. Minissale, M. Monge-Palacios, M. Monge-Palacios, M.B. Bell, M.C. Hemert van, M.P. Collings, M.P. Collings, M.P. Collings, M.S. Westley, M.S. Westley, N. Balucani, N. Katz, N. Lippok, N. Miyauchi, N. Nishi, N. Watanabe, N. Watanabe, N. Watanabe, N. Watanabe, N.F.W. Ligterink, N.G. Adams, N.J. Mason, N.J.B. Green, O. Berné, O. Biham, P. Caselli, P. Ehrenfreund, P. Swings, P. Theule, P.A. Gerakines, P.D. Brown, P.M. Woods, Q. Chang, Q. Chang, Q. Chang, Q. Chang, R. Garrod, R. Launhardt, R. T. Garrod, R.E. Weston, R.J. Gould, R.J.A. Grim, R.M. Logan, R.P. Bell, R.T. Garrod, R.T. Garrod, R.T. Garrod, R.T. Garrod, R.T. Garrod, R.T. Garrod, R.T. Garrod, S. Andersson, S. Andersson, S. Andersson, S. Andersson, S. Cazaux, S. Ioppolo, S. Ioppolo, S. Viti, S.A. Sandford, S.A. Sandford, S.A. Sandford, S.A. Sandford, S.B. Charnley, S.B. Charnley, S.D. Green, S.E. Bisschop, S.E. Bisschop, S.S. Prasad, T. Albertsson, T. Butscher, T. Grassi, T. Hama, T. Hama, T. Hama, T. Henning, T. Lamberts, T. Lamberts, T. Lamberts, T. Lamberts, T. Lamberts, T. Lamberts, T. Lauck, T. Stantcheva, T. Stantcheva, T.I. Hasegawa, T.I. Hasegawa, T.I. Hasegawa, T.J. Millar, T.J.H. Hele, T.L. Nguyen, T.L. Nguyen, T.L. Nguyen, T.L. Nguyen, T.P.M. Goumans, T.P.M. Goumans, T.P.M. Goumans, T.P.M. Goumans, T.W. Hartquist, V. Barone, V. Buch, V. Pirronello, V. Pirronello, V. Pirronello, V. Taquet, V. Taquet, V. Wakelam, V. Wakelam, V.K. Veeraghattam, W. Hagen, W.A. Brown, W.D. Geppert, W.D. Watson, W.D. Watson, W.D. Watson, Y. Aikawa, Y. Chen, Y. Li, Y. Oba, Y. Oba, Y. Oba, Y. Oba, Y. Oba, Y. Zhang, Y.V. Suleimanov, Z. Awad   +284 more
core   +8 more sources

Directed gas phase formation of silicon dioxide and implications for the formation of interstellar silicates

Nature Communications, 2018
Interstellar silicates play a key role in star formation, however their synthetic routes are not fully understood. Here, the authors provide evidence for the formation of SiO2 along with SiO via low-temperature gas phase chemistry.
Tao Yang, Aaron M. Thomas, Beni B. Dangi, Ralf I. Kaiser, Alexander M. Mebel, Tom J. Millar   +5 more
doaj   +1 more source

Interstellar Sulfur Chemistry [PDF]

Symposium - International Astronomical Union, 1980
This paper summarizes results of a chemical model of SO, CS, and OCS chemistry in dense clouds.
Sheo S. Prasad, Wesley T. Huntress
openaire   +1 more source

Anomalous formation of trihydrogen cations from water on nanoparticles

Nature Communications, 2021
The H3 + ion plays a key role in interstellar chemistry and can be formed from organic compounds upon interaction with charged particles or radiation. Here the authors demonstrate that H3 + can also be formed from water adsorbed on silica nanoparticles ...
M. Said Alghabra, Rami Ali, Vyacheslav Kim, Mazhar Iqbal, Philipp Rosenberger, Sambit Mitra, Ritika Dagar, Philipp Rupp, Boris Bergues, Deepak Mathur, Matthias F. Kling, Ali S. Alnaser   +11 more
doaj   +1 more source