Exploring Lenticular Galaxy Formation in Field Environments Using NewHorizon: Evidence for Counterrotating Gas Accretion as a Formation Channel

Seongbong Han; J. K. Jang; Emanuele Contini; Yohan Dubois; Seyoung Jeon; Sugata Kaviraj; Taysun Kimm; Katarina Kraljic; Sree Oh; Sébastien Peirani; Christophe Pichon; Sukyoung K. Yi

doi:10.3847/1538-4357/ad8ba7

Exploring Lenticular Galaxy Formation in Field Environments Using NewHorizon: Evidence for Counterrotating Gas Accretion as a Formation Channel

Seongbong Han, J. K. Jang, Emanuele Contini, Yohan Dubois, Seyoung Jeon, Sugata Kaviraj, Taysun Kimm, Katarina Kraljic, Sree Oh, Sébastien Peirani, Christophe Pichon, Sukyoung K. Yi

Research output: Contribution to journal › Article › peer-review

Abstract

The formation pathways of lenticular galaxies (S0s) in field environments remain a matter of debate. We utilize the cosmological hydrodynamic simulation, NewHorizon, to investigate the issue. We select two massive star formation quenched S0s as our main sample. By closely tracing their physical and morphological evolution, we identify two primary formation channels: mergers and counterrotating gas accretion. The former induces central gas inflow due to gravitational and hydrodynamic torques, triggering active central star formation, which quickly depletes the gas of the galaxy. Counterrotating gas accretion overall has a similar outcome but more exclusively through hydrodynamic collisions between the preexisting and newly accreted gas. Both channels lead to S0 morphology, with gas angular momentum cancellation being a crucial mechanism. These formation pathways quench star formation on a short timescale (

Original language	English
Article number	116
Pages (from-to)	1-14
Number of pages	14
Journal	The Astrophysical Journal
Volume	977
Issue number	1
Early online date	6 Dec 2024
DOIs	https://doi.org/10.3847/1538-4357/ad8ba7
Publication status	Published - 10 Dec 2024

Keywords

Galaxy dynamics
Galaxy formation
Galaxy evolution
Galaxy quenching
Galaxy mergers

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10.3847/1538-4357/ad8ba7Licence: CC BY

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© 2024. The Author(s). Published by the American Astronomical Society. This is an open access article distributed under the Creative Commons Attribution License, to view a copy of the license, see: https://creativecommons.org/licenses/by/4.0/
Final published version, 2.22 MBLicence: CC BY

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Han, S., Jang, J. K., Contini, E., Dubois, Y., Jeon, S., Kaviraj, S., Kimm, T., Kraljic, K., Oh, S., Peirani, S., Pichon, C., & Yi, S. K. (2024). Exploring Lenticular Galaxy Formation in Field Environments Using NewHorizon: Evidence for Counterrotating Gas Accretion as a Formation Channel. The Astrophysical Journal, 977(1), 1-14. Article 116. https://doi.org/10.3847/1538-4357/ad8ba7

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abstract = "The formation pathways of lenticular galaxies (S0s) in field environments remain a matter of debate. We utilize the cosmological hydrodynamic simulation, NewHorizon, to investigate the issue. We select two massive star formation quenched S0s as our main sample. By closely tracing their physical and morphological evolution, we identify two primary formation channels: mergers and counterrotating gas accretion. The former induces central gas inflow due to gravitational and hydrodynamic torques, triggering active central star formation, which quickly depletes the gas of the galaxy. Counterrotating gas accretion overall has a similar outcome but more exclusively through hydrodynamic collisions between the preexisting and newly accreted gas. Both channels lead to S0 morphology, with gas angular momentum cancellation being a crucial mechanism. These formation pathways quench star formation on a short timescale (",

keywords = "Galaxy dynamics, Galaxy formation, Galaxy evolution, Galaxy quenching, Galaxy mergers",

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Han, S, Jang, JK, Contini, E, Dubois, Y, Jeon, S, Kaviraj, S, Kimm, T, Kraljic, K, Oh, S, Peirani, S, Pichon, C & Yi, SK 2024, 'Exploring Lenticular Galaxy Formation in Field Environments Using NewHorizon: Evidence for Counterrotating Gas Accretion as a Formation Channel', The Astrophysical Journal, vol. 977, no. 1, 116, pp. 1-14. https://doi.org/10.3847/1538-4357/ad8ba7

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T1 - Exploring Lenticular Galaxy Formation in Field Environments Using NewHorizon: Evidence for Counterrotating Gas Accretion as a Formation Channel

AU - Han, Seongbong

AU - Jang, J. K.

AU - Contini, Emanuele

AU - Dubois, Yohan

AU - Jeon, Seyoung

AU - Kaviraj, Sugata

AU - Kimm, Taysun

AU - Kraljic, Katarina

AU - Oh, Sree

AU - Peirani, Sébastien

AU - Pichon, Christophe

AU - Yi, Sukyoung K.

N1 - © 2024. The Author(s). Published by the American Astronomical Society. This is an open access article distributed under the Creative Commons Attribution License, to view a copy of the license, see: https://creativecommons.org/licenses/by/4.0/

PY - 2024/12/10

Y1 - 2024/12/10

N2 - The formation pathways of lenticular galaxies (S0s) in field environments remain a matter of debate. We utilize the cosmological hydrodynamic simulation, NewHorizon, to investigate the issue. We select two massive star formation quenched S0s as our main sample. By closely tracing their physical and morphological evolution, we identify two primary formation channels: mergers and counterrotating gas accretion. The former induces central gas inflow due to gravitational and hydrodynamic torques, triggering active central star formation, which quickly depletes the gas of the galaxy. Counterrotating gas accretion overall has a similar outcome but more exclusively through hydrodynamic collisions between the preexisting and newly accreted gas. Both channels lead to S0 morphology, with gas angular momentum cancellation being a crucial mechanism. These formation pathways quench star formation on a short timescale (

AB - The formation pathways of lenticular galaxies (S0s) in field environments remain a matter of debate. We utilize the cosmological hydrodynamic simulation, NewHorizon, to investigate the issue. We select two massive star formation quenched S0s as our main sample. By closely tracing their physical and morphological evolution, we identify two primary formation channels: mergers and counterrotating gas accretion. The former induces central gas inflow due to gravitational and hydrodynamic torques, triggering active central star formation, which quickly depletes the gas of the galaxy. Counterrotating gas accretion overall has a similar outcome but more exclusively through hydrodynamic collisions between the preexisting and newly accreted gas. Both channels lead to S0 morphology, with gas angular momentum cancellation being a crucial mechanism. These formation pathways quench star formation on a short timescale (

KW - Galaxy dynamics

KW - Galaxy formation

KW - Galaxy evolution

KW - Galaxy quenching

KW - Galaxy mergers

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JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 1

M1 - 116

ER -

Exploring Lenticular Galaxy Formation in Field Environments Using NewHorizon: Evidence for Counterrotating Gas Accretion as a Formation Channel

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