Formation of the Luminosity-Sensitive 0 I Multiplet at 7774 A

Autor:	Hollis R. Johnson, L. W. Ramsey, R. W. Milkey
Rok vydání:	1974
Předmět:	Physics Bright giant Astronomy and Astrophysics Astrophysics Effective temperature Giant star Kinetic energy Luminosity Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Atomic physics Multiplet Luminosity function (astronomy) Line (formation)
Zdroj:	The Astrophysical Journal. 187:147
ISSN:	1538-4357 0004-637X
Popis:	Line profiles and equivalent widths were calculated for the 7774 A multiplet of O I for model atmospheres in the effective temperature range 6000-6500 K for surface gravities in the range log g = 4.0-1.0. A kinetic equilibrium treatment of line formation can partially account for the observed luminosity sensitivity of these lines and considerably modifies the derived microturbulent broadening parameter. Line profiles obtained from kinetic equilibrium line-formation theory are much deeper than LTE profiles, and new observations of Canopus are presented to verify the essential correctness of this treatment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3583b7365f36e2c1004bec32dd9e5b08 https://doi.org/10.1086/152600 Zobrazit plný text záznamu