Liquid-like behavior of UV-irradiated interstellar ice analog at low temperatures

Interstellar ice is believed to be a cradle of complex organic compounds, commonly found within icy comets and interstellar clouds, in association with ultraviolet (UV) irradiation and subsequent warming. We found that UV-irradiated amorphous ices composed of H(2)O, CH(3)OH, and NH(3) and of pure H(...

Descripción completa

Detalles Bibliográficos
Autores principales: Tachibana, Shogo, Kouchi, Akira, Hama, Tetsuya, Oba, Yasuhiro, Piani, Laurette, Sugawara, Iyo, Endo, Yukiko, Hidaka, Hiroshi, Kimura, Yuki, Murata, Ken-ichiro, Yurimoto, Hisayoshi, Watanabe, Naoki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2017
Materias:
Research Articles
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5621975/
https://www.ncbi.nlm.nih.gov/pubmed/28975154
http://dx.doi.org/10.1126/sciadv.aao2538
Descripción
Sumario:Interstellar ice is believed to be a cradle of complex organic compounds, commonly found within icy comets and interstellar clouds, in association with ultraviolet (UV) irradiation and subsequent warming. We found that UV-irradiated amorphous ices composed of H(2)O, CH(3)OH, and NH(3) and of pure H(2)O behave like liquids over the temperature ranges of 65 to 150 kelvin and 50 to 140 kelvin, respectively. This low-viscosity liquid-like ice may enhance the formation of organic compounds including prebiotic molecules and the accretion of icy dust to form icy planetesimals under certain interstellar conditions.

Ejemplares similares