Hydrogenation reactions in interstellar CO ice analogues
نویسندگان
چکیده
منابع مشابه
Hydrogenation reactions in interstellar CO ice analogues a combined experimental / theoretical approach
Context. Hydrogenation reactions of CO in interand circumstellar ices are regarded as an important starting point in the formation of more complex species. Previous laboratory measurements by two groups on the hydrogenation of CO ices resulted in controversial results on the formation rate of methanol (2002, ApJ, 577, 265 and 2002, ApJL, 571, L173). Aims. Our aim is to resolve this controversy ...
متن کاملThe formation of carbamate ions in interstellar ice analogues.
Carbon dioxide and ammonia are two of the most abundant species in astrophysical media, where they can react in the solid phase under certain conditions. This contribution presents a study of this reaction both in the presence of water and for anhydrous samples. It is shown that after deposition at 15 K, the reaction can start by warming the deposit, and the process continues on up to a tempera...
متن کاملInfrared spectroscopy of HCOOH in interstellar ice analogues
Context. HCOOH is one of the more common species in interstellar ices with abundances of 1–5% with respect to solid H2O. With the launch of the Spitzer Space Telescope new infrared spectra have become available of interstellar ices in different environments. So far systematic laboratory studies on HCOOH-containing interstellar ice analogues are lacking. Aims. This study aims at characterizing t...
متن کاملUV photodesorption of interstellar CO ice analogues: from subsurface excitation to surface desorption.
Carbon monoxide is after H(2) the most abundant molecule identified in the interstellar medium (ISM), and is used as a major tracer for the gas phase physical conditions. Accreted at the surface of water-rich icy grains, CO is considered to be the starting point of a complex organic--presumably prebiotic--chemistry. Non-thermal desorption processes, and especially photodesorption by UV photons,...
متن کاملDesorption of CO and O2 interstellar ice analogs
Aims. Solid O2 has been proposed as a possible reservoir for molecular oxygen in dense clouds through freeze-out processes. The aim of this work is to characterize quantitatively the physical processes that are involved in the desorption kinetics of CO–O2 ices by interpreting laboratory temperature programmed desorption (TPD) data. This information is used to simulate the behavior of CO–O2 ices...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200810784