Evidence for mixing between ICM and stripped ISM by the analysis of the gas metallicity in the tails of jellyfish galaxies

Andrea Franchetto; Stephanie Tonnesen; Bianca M. Poggianti; Benedetta Vulcani; Marco Gullieuszik; Alessia Moretti; Rory Smith; Alessandro Ignesti; Cecilia Bacchini; Sean McGee; Neven Tomičić; Matilde Mingozzi; Anna Wolter; Ancla Müller

doi:10.3847/2041-8213/ac3664

Evidence for mixing between ICM and stripped ISM by the analysis of the gas metallicity in the tails of jellyfish galaxies

Andrea Franchetto, Stephanie Tonnesen, Bianca M. Poggianti, Benedetta Vulcani, Marco Gullieuszik, Alessia Moretti, Rory Smith, Alessandro Ignesti, Cecilia Bacchini, Sean McGee, Neven Tomičić, Matilde Mingozzi, Anna Wolter, Ancla Müller

Physics and Astronomy

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Abstract

Hydrodynamical simulations show that the ram pressure stripping in galaxy clusters fosters a strong interaction between stripped interstellar medium (ISM) and the surrounding medium, with the possibility of intracluster medium (ICM) cooling into cold gas clouds. Exploiting the MUSE observation of three jellyfish galaxies from the GAs Stripping Phenomena in galaxies with MUSE (GASP) survey, we explore the gas metallicity of star-forming clumps in their gas tails. We find that the oxygen abundance of the stripped gas decreases as a function of the distance from the parent galaxy disk; the observed metallicity profiles indicate that more than 40% of the most metal-poor stripped clouds are constituted by cooled ICM, in qualitative agreement with simulations that predict mixing between the metal-rich ISM and the metal-poor ICM.

Original language	English
Article number	L6
Journal	Astrophysical Journal Letters
Volume	922
Issue number	1
Early online date	17 Nov 2021
DOIs	https://doi.org/10.3847/2041-8213/ac3664
Publication status	Published - 20 Nov 2021

Keywords

astro-ph.GA

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Franchetto, A., Tonnesen, S., Poggianti, B. M., Vulcani, B., Gullieuszik, M., Moretti, A., Smith, R., Ignesti, A., Bacchini, C., McGee, S., Tomičić, N., Mingozzi, M., Wolter, A., & Müller, A. (2021). Evidence for mixing between ICM and stripped ISM by the analysis of the gas metallicity in the tails of jellyfish galaxies. Astrophysical Journal Letters, 922(1), Article L6. https://doi.org/10.3847/2041-8213/ac3664

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title = "Evidence for mixing between ICM and stripped ISM by the analysis of the gas metallicity in the tails of jellyfish galaxies",

abstract = "Hydrodynamical simulations show that the ram pressure stripping in galaxy clusters fosters a strong interaction between stripped interstellar medium (ISM) and the surrounding medium, with the possibility of intracluster medium (ICM) cooling into cold gas clouds. Exploiting the MUSE observation of three jellyfish galaxies from the GAs Stripping Phenomena in galaxies with MUSE (GASP) survey, we explore the gas metallicity of star-forming clumps in their gas tails. We find that the oxygen abundance of the stripped gas decreases as a function of the distance from the parent galaxy disk; the observed metallicity profiles indicate that more than 40% of the most metal-poor stripped clouds are constituted by cooled ICM, in qualitative agreement with simulations that predict mixing between the metal-rich ISM and the metal-poor ICM.",

keywords = "astro-ph.GA",

author = "Andrea Franchetto and Stephanie Tonnesen and Poggianti, {Bianca M.} and Benedetta Vulcani and Marco Gullieuszik and Alessia Moretti and Rory Smith and Alessandro Ignesti and Cecilia Bacchini and Sean McGee and Neven Tomi{\v c}i{\'c} and Matilde Mingozzi and Anna Wolter and Ancla M{\"u}ller",

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doi = "10.3847/2041-8213/ac3664",

language = "English",

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Franchetto, A, Tonnesen, S, Poggianti, BM, Vulcani, B, Gullieuszik, M, Moretti, A, Smith, R, Ignesti, A, Bacchini, C, McGee, S, Tomičić, N, Mingozzi, M, Wolter, A & Müller, A 2021, 'Evidence for mixing between ICM and stripped ISM by the analysis of the gas metallicity in the tails of jellyfish galaxies', Astrophysical Journal Letters, vol. 922, no. 1, L6. https://doi.org/10.3847/2041-8213/ac3664

TY - JOUR

T1 - Evidence for mixing between ICM and stripped ISM by the analysis of the gas metallicity in the tails of jellyfish galaxies

AU - Franchetto, Andrea

AU - Tonnesen, Stephanie

AU - Poggianti, Bianca M.

AU - Vulcani, Benedetta

AU - Gullieuszik, Marco

AU - Moretti, Alessia

AU - Smith, Rory

AU - Ignesti, Alessandro

AU - Bacchini, Cecilia

AU - McGee, Sean

AU - Tomičić, Neven

AU - Mingozzi, Matilde

AU - Wolter, Anna

AU - Müller, Ancla

PY - 2021/11/20

Y1 - 2021/11/20

N2 - Hydrodynamical simulations show that the ram pressure stripping in galaxy clusters fosters a strong interaction between stripped interstellar medium (ISM) and the surrounding medium, with the possibility of intracluster medium (ICM) cooling into cold gas clouds. Exploiting the MUSE observation of three jellyfish galaxies from the GAs Stripping Phenomena in galaxies with MUSE (GASP) survey, we explore the gas metallicity of star-forming clumps in their gas tails. We find that the oxygen abundance of the stripped gas decreases as a function of the distance from the parent galaxy disk; the observed metallicity profiles indicate that more than 40% of the most metal-poor stripped clouds are constituted by cooled ICM, in qualitative agreement with simulations that predict mixing between the metal-rich ISM and the metal-poor ICM.

AB - Hydrodynamical simulations show that the ram pressure stripping in galaxy clusters fosters a strong interaction between stripped interstellar medium (ISM) and the surrounding medium, with the possibility of intracluster medium (ICM) cooling into cold gas clouds. Exploiting the MUSE observation of three jellyfish galaxies from the GAs Stripping Phenomena in galaxies with MUSE (GASP) survey, we explore the gas metallicity of star-forming clumps in their gas tails. We find that the oxygen abundance of the stripped gas decreases as a function of the distance from the parent galaxy disk; the observed metallicity profiles indicate that more than 40% of the most metal-poor stripped clouds are constituted by cooled ICM, in qualitative agreement with simulations that predict mixing between the metal-rich ISM and the metal-poor ICM.

KW - astro-ph.GA

UR - https://arxiv.org/abs/2111.04755

U2 - 10.3847/2041-8213/ac3664

DO - 10.3847/2041-8213/ac3664

M3 - Article

SN - 2041-8205

VL - 922

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L6

ER -

Evidence for mixing between ICM and stripped ISM by the analysis of the gas metallicity in the tails of jellyfish galaxies

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