Zobrazeno 1 - 10
of 254
pro vyhledávání: '"WAKELAM, Valentine"'
Shock waves from supernova remnants (SNRs) have strong influence on the physical and chemical properties of molecular clouds (MCs). Shocks propagating into magnetized MCs can be classified into "jump" J-shock and "continuous" C-shock. The molecular c
Externí odkaz:
http://arxiv.org/abs/2412.09092
Atomic carbon in its ground electronic state, C(3P), is expected to be present at high abundances during the evolution of dense molecular clouds. Consequently, its reactions with other interstellar species could have a strong influence on the chemica
Externí odkaz:
http://arxiv.org/abs/2405.01068
The reactions of ground state atomic carbon, C(3P), are likely to be important in astrochemistry due to the high abundance levels of these atoms in the dense interstellar medium. Here we present a study of the gas-phase reaction between C(3P) and ace
Externí odkaz:
http://arxiv.org/abs/2309.07497
Autor:
Rocha, Carlos M. R., Roncero, Octavio, Bulut, Niyazi, Zuchowski, Piotr, Navarro-Almaida, David, Fuente, Asuncion, Wakelam, Valentine, Loison, Jean-Christophe, Roueff, Evelyne, Goicoechea, Javier R., Esplugues, Gisela, Beitia-Antero, Leire, Caselli, Paola, Lattanzi, Valerio, Pineda, Jaime, Gal, Romane Le, Rodriguez-Baras, Marina, Riviere-Marichalar, Pablo
Publikováno v:
A&A 677, A41 (2023)
We revise the rates of reactions CH + S -> CS + H and C_2 + S -> CS + C, important CS formation routes in dark and diffuse warm gas. We performed ab initio calculations to characterize the main features of all the electronic states correlating to the
Externí odkaz:
http://arxiv.org/abs/2307.00311
Autor:
Mondal, Suman Kumar, Iqbal, Wasim, Gorai, Prasanta, Bhat, Bratati, Wakelam, Valentine, Das, Ankan
Publikováno v:
A&A 669, A71 (2023)
Recent observations have shown that Nitrogen-bearing complex organic species are present in large quantities in star-forming regions. Thus, investigating the N-bearing species in a hot molecular core, such as G10.47+0.03, is crucial to understanding
Externí odkaz:
http://arxiv.org/abs/2211.03066
Autor:
Rivière-Marichalar, Pablo, Fuente, Asunción, Esplugues, Gisela, Wakelam, Valentine, Gal, Romane le, Baruteau, Clément, Ribas, Álvaro, Macías, Enrique, Neri, Roberto, Navarro-Almaida, David
Publikováno v:
A&A 665, A61 (2022)
The sulfur abundance is poorly known in most environments. Yet, deriving the sulfur abundance is key to understanding the evolution of the chemistry from molecular clouds to planetary atmospheres. We present observations of H$_2$S 110-101 at 168.763
Externí odkaz:
http://arxiv.org/abs/2207.06716
Autor:
Campanha, Danilo R., Mendoza, Edgar, Silva, Mateus X., Velloso, Paulo F. G., Carvajal, Miguel, Wakelam, Valentine, Galvão, Breno R. L.
The Si+SO$_2$ reaction is investigated to verify its impact on the abundances of molecules with astrochemical interest, such as SiS, SiO, SO and others. According to our results Si($^3$P) and SO$_2$ react barrierlessly yielding only the monoxides SO
Externí odkaz:
http://arxiv.org/abs/2206.04982
Autor:
Hickson, Kevin M., Loison, Jean-Christophe, Larregaray, Pascal, Bonnet, Laurent, Wakelam, Valentine
The reaction between atomic carbon in its ground electronic state, C(3P), and nitrous oxide, N2O, has been studied below room temperature due to its potential importance for astrochemistry, with both species considered to be present at high abundance
Externí odkaz:
http://arxiv.org/abs/2202.03782
Autor:
Minissale, Marco, Aikawa, Yuri, Bergin, Edwin, Bertin, M., Brown, Wendy A., Cazaux, Stephanie, Charnley, Steven B., Coutens, Audrey, Cuppen, Herma M., Guzman, Victoria, Linnartz, Harold, McCoustra, Martin R. S., Rimola, Albert, Schrauwen, Johanna G. M., Toubin, Celine, Ugliengo, Piero, Watanabe, Naoki, Wakelam, Valentine, Dulieu, Francois
Publikováno v:
ACS Earth and Space Science, 2022
The evolution of star-forming regions and their thermal balance are strongly influenced by their chemical composition, that, in turn, is determined by the physico-chemical processes that govern the transition between the gas phase and the solid state
Externí odkaz:
http://arxiv.org/abs/2201.07512
Rate constants have been measured for the C(3P) + CH3CN reaction between 50 K and 296 K using a continuous-flow supersonic reactor. C(3P) atoms were created by the in-situ pulsed laser photolysis of CBr4 at 266 nm, while the kinetics of C(3P) atom lo
Externí odkaz:
http://arxiv.org/abs/2103.13670