Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Vidali, Gianfranco"'
Autor:
He, Jiao, Rickert, Paula Caroline Pérez, Suhasaria, Tushar, Sohier, Orianne, Bäcker, Tia, Demertzi, Dimitra, Vidali, Gianfranco, Henning, Thomas K.
Publikováno v:
Molecular Physics, 2023
The diffusion of molecules on interstellar grain surfaces is one of the most important driving forces for the molecular complexity in the interstellar medium. Due to the lack of laboratory measurements, astrochemical modeling of grain surface process
Externí odkaz:
http://arxiv.org/abs/2302.08628
Autor:
He, Jiao, Perotti, Giulia, Emtiaz, Shahnewaz M., Toriello, Francis E., Boogert, Adwin, Henning, Thomas, Vidali, Gianfranco
Publikováno v:
A&A 668, A76 (2022)
CO is one of the most abundant ice components on interstellar dust grains. When it is mixed with amorphous solid water (ASW) or located on its surface, an absorption band of CO at 2152 cm$^{-1}$ is always present in laboratory measurements. This spec
Externí odkaz:
http://arxiv.org/abs/2203.01424
Autor:
He, Jiao, Clements, Aspen R., Emtiaz, SM, Toriello, Francis, Garrod, Robin T., Vidali, Gianfranco
The need to characterize ices coating dust grains in dense interstellar clouds arises from the importance of ice morphology in facilitating the diffusion and storage of radicals and reaction products in ices, a well-known place for the formation of c
Externí odkaz:
http://arxiv.org/abs/1905.00969
Analyses of infrared signatures of CO$_2$ in water dominated ices in the ISM can give information on the physical state of CO$_2$ in icy grains and on the thermal history of the ices themselves. In many sources, CO$_2$ was found in the `pure' crystal
Externí odkaz:
http://arxiv.org/abs/1810.07754
The diffusion of atoms and molecules in ices covering dust grains in dense clouds in interstellar space is an important but poorly characterized step in the formation of complex molecules in space. Here we report the measurement of diffusion of simpl
Externí odkaz:
http://arxiv.org/abs/1806.06980
Autor:
Wakelam, Valentine, Bron, Emeric, Cazaux, Stephanie, Dulieu, Francois, Gry, Cécile, Guillard, Pierre, Habart, Emilie, Hornekær, Liv, Morisset, Sabine, Nyman, Gunnar, Pirronello, Valerio, Price, Stephen D., Valdivia, Valeska, Vidali, Gianfranco, Watanabe, Naoki
Molecular hydrogen is the most abundant molecule in the universe. It is the first one to form and survive photo-dissociation in tenuous environments. Its formation involves catalytic reactions on the surface of interstellar grains. The micro-physics
Externí odkaz:
http://arxiv.org/abs/1711.10568
Hydrogen, being the most abundant element, is the driver of many if not most reactions occurring on interstellar dust grains. In hydrogen atom addition reactions, the rate is usually determined by the surface kinetics of the hydrogen atom instead of
Externí odkaz:
http://arxiv.org/abs/1711.03698
Autor:
He, Jiao, Vidali, Gianfranco
Carbon dioxide is abundant in ice mantles of dust grains; some is found in the pure crystalline form as inferred from the double peak splitting of the bending profile at about 650 cm$^{-1}$. To study how CO$_2$ segregates into the pure form from wate
Externí odkaz:
http://arxiv.org/abs/1708.01600
Observations by ISO and Spitzer towards young stellar objects (YSOs) showed that CO$_2$ segregates in the icy mantles covering dust grains. Thermal processing of ice mixture was proposed as responsible for the segregation. Although several laboratory
Externí odkaz:
http://arxiv.org/abs/1611.02182
We measured the binding energy of N$_2$, CO, O$_2$, CH$_4$, and CO$_2$ on non-porous (compact) amorphous solid water (np-ASW), of N$_2$ and CO on porous amorphous solid water (p-ASW), and of NH$_3$ on crystalline water ice. We were able to measure bi
Externí odkaz:
http://arxiv.org/abs/1603.02191