Collision-induced absorption of radiation in the atmospheres of late-type stars
- Authors: Pavlenko Y.V.1,2
- 
							Affiliations: 
							- Main Astronomical Observatory
- Centre for Astrophysics Research
 
- Issue: Vol 60, No 5 (2016)
- Pages: 509-516
- Section: Article
- URL: https://journals.rcsi.science/1063-7729/article/view/189898
- DOI: https://doi.org/10.1134/S1063772916040089
- ID: 189898
Cite item
Abstract
Problems associated with taking into account absorption induced by collisions between hydrogen and helium atoms, helium atoms and hydrogen molecules, and hydrogen molecules, resulting in the formation of short-lived, quasi-molecular complexes are discussed, together with opacity in the atmospheres of late-type stars due to such absorption. There is good agreement between such opacities computed using codes developed by the author and by R. Kurucz. To demonstrate the importance of including collision-induced opacity, theoretical fluxes are compared to the observed spectral energy distribution of the metal-poor L subdwarf SDSS J125637.13-022452.4. The spectral energy distribution of this object can be reproduced with an effective temperature of Teff = 2600 K only if collision-induced absorption is taken into account.
About the authors
Ya. V. Pavlenko
Main Astronomical Observatory; Centre for Astrophysics Research
							Author for correspondence.
							Email: yp@mao.kiev.ua
				                					                																			                												                	Ukraine, 							ul. Akademika Zabolotnogo 27, Kiev, 03680; Hatfield, AL10 9AB						
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