Apparent Effect of Dust Extinction on the Observed Outflow Velocity of Ionized Gas in Galaxy Mergers

In this study, we examine photoionization outflows during the late stages of galaxy mergers, with a specific focus on the relation between the observed velocity of outflowing gas and the apparent effects of dust extinction. We used the N -body/smoothed particle hydrodynamics code ASURA for galaxy me...
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Gespeichert in:

Autor*in:	Naomichi Yutani [verfasserIn] Yoshiki Toba [verfasserIn] Keiichi Wada [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2024

Schlagwörter:	Galactic center Galaxy mergers Active galactic nuclei High-luminosity active galactic nuclei Hydrodynamical simulations

Übergeordnetes Werk:	In: The Astrophysical Journal - IOP Publishing, 2022, 961(2024), 1, p 68
Übergeordnetes Werk:	volume:961 ; year:2024 ; number:1, p 68

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3847/1538-4357/ad0dfc

Katalog-ID:	DOAJ097590312

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callnumber-first	Q - Science
author	Naomichi Yutani
spellingShingle	Naomichi Yutani misc QB460-466 misc Galactic center misc Galaxy mergers misc Active galactic nuclei misc High-luminosity active galactic nuclei misc Hydrodynamical simulations misc Astrophysics Apparent Effect of Dust Extinction on the Observed Outflow Velocity of Ionized Gas in Galaxy Mergers
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topic_title	QB460-466 Apparent Effect of Dust Extinction on the Observed Outflow Velocity of Ionized Gas in Galaxy Mergers Galactic center Galaxy mergers Active galactic nuclei High-luminosity active galactic nuclei Hydrodynamical simulations
topic	misc QB460-466 misc Galactic center misc Galaxy mergers misc Active galactic nuclei misc High-luminosity active galactic nuclei misc Hydrodynamical simulations misc Astrophysics
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title	Apparent Effect of Dust Extinction on the Observed Outflow Velocity of Ionized Gas in Galaxy Mergers
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title_full	Apparent Effect of Dust Extinction on the Observed Outflow Velocity of Ionized Gas in Galaxy Mergers
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title_sort	apparent effect of dust extinction on the observed outflow velocity of ionized gas in galaxy mergers
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title_auth	Apparent Effect of Dust Extinction on the Observed Outflow Velocity of Ionized Gas in Galaxy Mergers
abstract	In this study, we examine photoionization outflows during the late stages of galaxy mergers, with a specific focus on the relation between the observed velocity of outflowing gas and the apparent effects of dust extinction. We used the N -body/smoothed particle hydrodynamics code ASURA for galaxy merger simulations. These simulations concentrated on identical galaxy mergers featuring supermassive black holes of 10 ^8 M _⊙ and gas fractions of 30% and 10%. From the simulation data, we derived velocity and velocity dispersion diagrams for the active galactic nuclei (AGN)-driven ionized outflowing gas. Our findings show that high-velocity outflows with velocity dispersions of 500 km s ^−1 or greater can be observed in the late stages of galactic mergers. Particularly, in buried AGNs, both the luminosity-weighted outflow velocity and velocity dispersion increase owing to the apparent effects of dust extinction. Owing to these effects, velocity–velocity dispersion diagrams display a noticeable blue-shifted tilt in models with higher gas fractions. Crucially, this tilt is not influenced by the AGN luminosity but emerges from the observational impacts of dust extinction. Our results imply that the observed high-velocity [O iii ] λ 5007 outflow exceeding 1000 km s ^−1 in buried AGNs may be linked to the dust extinction that occurs during the late stages of gas-rich galaxy mergers.
abstractGer	In this study, we examine photoionization outflows during the late stages of galaxy mergers, with a specific focus on the relation between the observed velocity of outflowing gas and the apparent effects of dust extinction. We used the N -body/smoothed particle hydrodynamics code ASURA for galaxy merger simulations. These simulations concentrated on identical galaxy mergers featuring supermassive black holes of 10 ^8 M _⊙ and gas fractions of 30% and 10%. From the simulation data, we derived velocity and velocity dispersion diagrams for the active galactic nuclei (AGN)-driven ionized outflowing gas. Our findings show that high-velocity outflows with velocity dispersions of 500 km s ^−1 or greater can be observed in the late stages of galactic mergers. Particularly, in buried AGNs, both the luminosity-weighted outflow velocity and velocity dispersion increase owing to the apparent effects of dust extinction. Owing to these effects, velocity–velocity dispersion diagrams display a noticeable blue-shifted tilt in models with higher gas fractions. Crucially, this tilt is not influenced by the AGN luminosity but emerges from the observational impacts of dust extinction. Our results imply that the observed high-velocity [O iii ] λ 5007 outflow exceeding 1000 km s ^−1 in buried AGNs may be linked to the dust extinction that occurs during the late stages of gas-rich galaxy mergers.
abstract_unstemmed	In this study, we examine photoionization outflows during the late stages of galaxy mergers, with a specific focus on the relation between the observed velocity of outflowing gas and the apparent effects of dust extinction. We used the N -body/smoothed particle hydrodynamics code ASURA for galaxy merger simulations. These simulations concentrated on identical galaxy mergers featuring supermassive black holes of 10 ^8 M _⊙ and gas fractions of 30% and 10%. From the simulation data, we derived velocity and velocity dispersion diagrams for the active galactic nuclei (AGN)-driven ionized outflowing gas. Our findings show that high-velocity outflows with velocity dispersions of 500 km s ^−1 or greater can be observed in the late stages of galactic mergers. Particularly, in buried AGNs, both the luminosity-weighted outflow velocity and velocity dispersion increase owing to the apparent effects of dust extinction. Owing to these effects, velocity–velocity dispersion diagrams display a noticeable blue-shifted tilt in models with higher gas fractions. Crucially, this tilt is not influenced by the AGN luminosity but emerges from the observational impacts of dust extinction. Our results imply that the observed high-velocity [O iii ] λ 5007 outflow exceeding 1000 km s ^−1 in buried AGNs may be linked to the dust extinction that occurs during the late stages of gas-rich galaxy mergers.
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title_short	Apparent Effect of Dust Extinction on the Observed Outflow Velocity of Ionized Gas in Galaxy Mergers
url	https://doi.org/10.3847/1538-4357/ad0dfc https://doaj.org/article/1b120db2c1804f50a626d4933d91334d https://doaj.org/toc/1538-4357
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