Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Shmeld, Ivar"'
Autor:
Kalvans, Juris, Shmeld, Ivar
The deuterium enrichment in molecules in dark molecular cloud cores and starforming regions is usually attributed to gas-phase chemistry. Here we examine the effects of surface and mantle chemical reactions on the deuteration of species. We use a sim
Externí odkaz:
http://arxiv.org/abs/1803.05731
Autor:
Kalvāns, Juris, Shmeld, Ivar
Publikováno v:
Kalvans, J., Shmeld, I., Astronomy & Astrophysics, 554, A111 (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. The processing is caused by cosmic-ra
Externí odkaz:
http://arxiv.org/abs/1305.3303
Autor:
Kalvans, Juris, Shmeld, Ivar
Publikováno v:
Baltic Astronomy, 2012, Vol. 21, p. 447-454
The question, what is the role of freeze-out of chemical species in determining the molecular abundances in the interstellar gas is a matter of debate. We investigate a theoretical case of a dense interstellar molecular cloud core by time-dependent m
Externí odkaz:
http://arxiv.org/abs/1301.1830
Autor:
Kalvans, Juris, Shmeld, Ivar
Publikováno v:
Kalvans, J., Shmeld, I. 2010, A&A, 521, A37
Context. The abundances of many observed compounds in interstellar molecular clouds still lack an explanation, despite extensive research that includes both gas and solid (dust-grain surface) phase reactions. Aims. We aim to qualitatively prove the i
Externí odkaz:
http://arxiv.org/abs/1207.2689
Publikováno v:
Proceedings of the International Astronomical Union. Dec2022, Vol. 18 Issue S380, p240-242. 3p.
Publikováno v:
Open Astronomy, Vol 22, Iss 1, Pp 1-7 (2013)
Externí odkaz:
https://doaj.org/article/3381ef9aaa824e3d8e7d923b37d7e784
Autor:
Kalvāns Juris, Shmeld Ivar
Publikováno v:
Open Astronomy, Vol 21, Iss 4, Pp 447-454 (2012)
The question, what is the role of freeze-out of chemical species in determining the molecular abundances in the interstellar gas is a matter of debate. We investigate a theoretical case of a dense interstellar molecular cloud core by time-dependent m
Externí odkaz:
https://doaj.org/article/2d28d4fb11524d1fa5e4ffb258c5dfd5
Publikováno v:
Proceedings of the International Astronomical Union; Dec2022, Vol. 18 Issue S380, p199-201, 3p
Autor:
Bērziņš, Kārlis1 (AUTHOR) karlis.berzins@venta.lv, Shmeld, Ivar1 (AUTHOR), Aberfelds, Artis1 (AUTHOR), Tarchi, A. (AUTHOR), Reid, M.J. (AUTHOR), Castangia, P. (AUTHOR)
Publikováno v:
Proceedings of the International Astronomical Union. Sep2017, Vol. 13 Issue S336, p61-62. 2p.