The influence of variations of the elemental composition on the thermal properties of gas behind shock fronts
- Авторлар: Vasiliev E.O.1,2, Shchekinov Y.A.3
- 
							Мекемелер: 
							- Southern Federal University
- Special Astrophysical Observatory
- Astro Space Center, Lebedev Physical Institute
 
- Шығарылым: Том 61, № 4 (2017)
- Беттер: 342-346
- Бөлім: Article
- URL: https://journals.rcsi.science/1063-7729/article/view/190597
- DOI: https://doi.org/10.1134/S1063772917040175
- ID: 190597
Дәйексөз келтіру
Аннотация
The homogenization of inhomogeneities in the elemental composition of the interstellar medium due to stellar evolution and weak mixing are inevitably related to the action of shocks. This paper considers the influence of variations in the elemental composition on the thermal and ionizational evolution of a collisional gas with the solar metallicity that is cooled behind a shock front with a velocity of 50–120 km/s. The intensities of lines of heavy elements in plasma cooling behind a shock front depend not only on variations in the elemental composition, but also on the shock velocity, due to the different values of the critical density for the transition to the equilibrium level populations in atoms and ions of heavy elements. This circumstance can be used to determine the elemental composition of cool and warm gas of the interstellar medium, as well as the thermal history of the gas.
Авторлар туралы
E. Vasiliev
Southern Federal University; Special Astrophysical Observatory
							Хат алмасуға жауапты Автор.
							Email: eugstar@mail.ru
				                					                																			                												                	Ресей, 							Rostov-on-Don; Karachaevo-Cherkesskaya Republic, 357169						
Yu. Shchekinov
Astro Space Center, Lebedev Physical Institute
							Хат алмасуға жауапты Автор.
							Email: yus@asc.rssi.ru
				                					                																			                												                	Ресей, 							Profsoyuznaya ul. 84/32, Moscow, 117997						
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