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Revealing the Relation between Star Formation Activity of Jellyfish Galaxies and Ram Pressure Stripping

Published online by Cambridge University Press:  09 June 2023

Jeong Hwan Lee Open the ORCID record for Jeong Hwan Lee [Opens in a new window] ,
Myung Gyoon Lee ,
Jae Yeon Mun ,
Brian S. Cho  and
Jisu Kang
Jeong Hwan Lee
Affiliation:
Seoul National University, Seoul 08826, Republic of Korea Kyungpook National University, Daegu 41566, Republic of Korea
Myung Gyoon Lee
Affiliation:
Seoul National University, Seoul 08826, Republic of Korea
Jae Yeon Mun
Affiliation:
Australian Nationial University, Canberra, ACT 2611, Australia
Brian S. Cho
Affiliation:
Seoul National University, Seoul 08826, Republic of Korea
Jisu Kang
Affiliation:
Seoul National University, Seoul 08826, Republic of Korea
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Abstract

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Jellyfish galaxies are starburst galaxies with ram-pressure-stripped tails and blue star-forming knots. These galaxies show a snapshot of star formation enhancement triggered by ram pressure stripping (RPS), being important targets for studying the RPS-induced star formation in gas-rich galaxies. Here we investigate the star formation activity of five jellyfish galaxies in massive clusters, using Gemini GMOS/IFU observations. From the Hα-derived star formation rates (SFRs), we find that our sample shows higher SFR excess to the star formation main sequence than the jellyfish galaxies in low-mass clusters. From the compiled sample of jellyfish galaxies in low-mass to high-mass host clusters, we suggest that the star formation activity of jellyfish galaxies has positive correlations with host cluster mass and degree of RPS. These relationships imply that higher ram pressure environments tend to trigger stronger starbursts in jellyfish galaxies in the early stage of RPS.

Keywords

Galaxy evolutionGalaxy environmentsRam pressure strippingStarburst galaxyJellyfish galaxyIntegral Field Spectroscopy
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 17 , Symposium S373: Resolving the Rise and Fall of Star Formation in Galaxies , August 2021 , pp. 132 - 135
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Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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