The [O III]4363 Emitting Region Obscured by Dusty Tori

Tohru Nagao; Takashi Murayama; Yoshiaki Taniguchi

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The [O III]4363 Emitting Region Obscured by Dusty Tori

Tohru Nagao·Takashi Murayama·Yoshiaki Taniguchi

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Abstract

The emission-line flux ratio of [O III]4363/[O III]5007 is a useful diagnostic for the ionization mechanism and physical properties of narrow-line regions in active galactic nuclei. However, it is known that simple photoionization models underpredict this ratio. In this contribution, we report on some pieces of evidence that a large fraction of the [O III]4363 emission arises from the dense gas, which can be obscured by dusty tori. Taking this dense component into account, we show that the flux ratio of [O III]4363/[O III]5007 can be explained by two-component photoionization models.

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Tohru Nagao, Takashi Murayama, Yoshiaki Taniguchi. 2001-06-17. The [O III]4363 Emitting Region Obscured by Dusty Tori. https://arxiv.org/abs/astro-ph/0106295

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