Pulsation Driving Forces in Less-Massive Supergiants

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概要

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• We demonstrate at first that the blue edge of the fundamental mode of luminous less-massive supergiant models is shifted blue-wards with increasing luminosities (we call it the blue edge anomaly). This is in sharp contrast with intermediate-mass supergiants for classical Cepheids. It is shown then that the models have an additional driving force due to the negative gradient of density perturbations in addition to conventional driving forces associated with the ionization zones. The driving force becomes important with increasing luminosities. The damping in deep interior becomes lesser also with increasing luminosities, because the radiation pressure dominates the gas pressure. These two effects make the blue edge anomaly in luminous less-massive supergiants.Stellar pulsationLess-massive supergiants

• 東北大学の論文
• 1988-02-29

著者

• Aikawa Toshiki

  Faculty Of Engineering Tohoku-gakuin University

関連論文

• Pulsation Driving Forces in Less-Massive Supergiants

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