Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Juris Roberts Kalnin"'
Temperature Spectra of Interstellar Dust Grains Heated by Cosmic Rays. III. Mixed-composition Grains
Autor:
Juris Kalvāns, Juris Roberts Kalnin
Publikováno v:
The Astrophysical Journal Supplement Series. 263:5
Icy grains in the interstellar medium and star formation regions consist of a variety of materials. Such composite grains interact differently with cosmic-ray (CR) particles compared to simple single-material grains. We aim to calculate the spectra o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8ce9ff8ecb895fc8e71957598445a3c
https://doi.org/10.3847/1538-4365/ac92e6
https://doi.org/10.3847/1538-4365/ac92e6
Autor:
Juris Roberts Kalnin, Juris Kalvāns
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 486:2050-2062
Cosmic-ray-induced whole-grain heating induces evaporation and other processes that affect the chemistry of interstellar clouds. With recent data on grain heating frequencies as an input for a modified rate-equation astrochemical model, this study ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4926e1877e48d734504295bd101b91cf
https://doi.org/10.1093/mnras/stz1010
https://doi.org/10.1093/mnras/stz1010
Autor:
Juris Kalvāns, Juris Roberts Kalnin
Context. Evaporative (sublimation) cooling of icy interstellar grains occurs when the grains have been suddenly heated by a cosmic-ray (CR) particle or other process. It results in thermal desorption of icy species, affecting the chemical composition
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb67afcbef89e2857361f0c9165ba185
http://arxiv.org/abs/2007.04720
http://arxiv.org/abs/2007.04720
Autor:
Juris Roberts Kalnin, Juris Kalvāns
Context. While radiative cooling of interstellar grains is a well-known process, little detail is known about the cooling of grains with an icy mantle that contains volatile adsorbed molecules. Aims. We explore basic details for the cooling process o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7474bce02cf93c58481150037963d5ac
http://arxiv.org/abs/1912.11378
http://arxiv.org/abs/1912.11378
Publikováno v:
J Chem Phys
Coarse-graining of an asymmetric nearest-neighbor discrete-time random walk on a one-dimensional lattice allows one to describe this random walk as biased one-dimensional diffusion. The latter is characterized by two parameters: the drift velocity an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3ca37a944482f07863c672f9aae0b81
https://doi.org/10.1063/1.5129637
https://doi.org/10.1063/1.5129637
Publikováno v:
Physica B: Condensed Matter. :50-52
The expression for the effective diffusion coefficient in one-dimensional discrete lattice model of random walks in matrix with inclusions and unequal hopping lengths is derived. This allowed us to suggest a physical interpretation to the concentrati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41cd377a50dda57da14557c7012ddac3
https://doi.org/10.1016/j.physb.2015.04.021
https://doi.org/10.1016/j.physb.2015.04.021
Publikováno v:
Monthly Notices of the Royal Astronomical Society. :stx174
Understanding gas-grain chemistry of deuterium in star-forming objects may help to explain their history and present state. We aim to clarify how processes in ices affect the deuterium fractionation. In this regard, we investigate a Solar-mass protos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::355acd69830a8512945c7f8b9a4896f3
https://doi.org/10.1093/mnras/stx174
https://doi.org/10.1093/mnras/stx174
Publikováno v:
The Journal of chemical physics. 137(16)
A closed formula for the effective diffusion coefficient in a heterogeneous medium with periodically distributed inclusions is derived using the extended effective medium theory. It is shown that the expression for the effective diffusion coefficient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5d870ab9ac79108a6d96b8b0302fcbd
https://pubmed.ncbi.nlm.nih.gov/23126742
https://pubmed.ncbi.nlm.nih.gov/23126742
Publikováno v:
The Journal of Chemical Physics. 139:196101
The Lifson-Jackson formula provides the effective free diffusion coefficient for a particle diffusing in an arbitrary one-dimensional periodic potential. Its counterpart, when the underlying dynamics is described in terms of an unbiased nearest-neigh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbbd75595958371ce918fd342fc48a1f
https://doi.org/10.1063/1.4832035
https://doi.org/10.1063/1.4832035