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Precise Determination of Extinction Corrections and Plasma Diagnostics

Published online by Cambridge University Press:  06 October 2025

Toshiya Ueta Open the ORCID record for Toshiya Ueta [Opens in a new window]  and
Masaaki Otsuka
Toshiya Ueta*
Affiliation:
Department of Physics and Astronomy, University of Denver, USA
Masaaki Otsuka
Affiliation:
Okayama Observatory, Kyoto University, Japan
*
Email: Toshiya.Ueta@du.edu
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Abstract

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Extinction correction is the quintessence of astronomy. To achieve precision astrophysics in plasma diagnostics as in the theme of the present Proceedings, one must perform extinction correction properly before executing any line diagnostics of line-emitting objects including planetary nebulae. By making use of the inseparable relationship between extinction correction and plasma diagnostics, we establish a novel method to determine the physical conditions of a line-emitting target and the extinction characteristics along the line of sight toward the target simultaneously and self-consistently. This approach is made possible by the exact analytical expressions for the extinction parameters in terms of the emission properties of the target and by statistical optimization of the extinction parameters to find the robust physical conditions of the target.

Keywords

plasmasmethods: analyticalmethods: statisticaltechniques: spectroscopicdustextinction

Information

Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S384: Planetary Nebulae: A Universal Toolbox in the Era of Precision Astrophysics , December 2023 , pp. 143 - 149
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Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of International Astronomical Union

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