The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP-Wide Field

Eunbin Kim; Ho Seong Hwang; Woong Seob Jeong; Seong Jin Kim; Denis Burgarella; Tomotsugu Goto; Tetsuya Hashimoto; Young Soo Jo; Jong Chul Lee; Matthew Malkan; Chris Pearson; Hyunjin Shim; Yoshiki Toba; Simon C.C. Ho; Daryl Joe Santos; Hiroyuki Ikeda; Helen K. Kim; Takamitsu Miyaji; Hideo Matsuhara; Nagisa Oi; Toshinobu Takagi; Ting Wen Wang

doi:10.1093/mnras/stab2090

The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP-Wide Field

Eunbin Kim, Ho Seong Hwang, Woong Seob Jeong, Seong Jin Kim, Denis Burgarella, Tomotsugu Goto, Tetsuya Hashimoto, Young Soo Jo, Jong Chul Lee, Matthew Malkan, Chris Pearson, Hyunjin Shim, Yoshiki Toba, Simon C.C. Ho, Daryl Joe Santos, Hiroyuki Ikeda, Helen K. Kim, Takamitsu Miyaji, Hideo Matsuhara, Nagisa OiToshinobu Takagi, Ting Wen Wang

Department of Earth Science Education

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

7 Scopus citations

Abstract

We study the galaxy merger fraction and its dependence on star formation mode in the 5.4 deg2 of the North Ecliptic Pole-Wide Field. We select 6352 galaxies with AKARI 9 $\mu$m detections, and identify mergers among them using the Gini coefficient and M20 derived from the Subaru/Hyper Suprime-Cam (HSC) optical images. We obtain the total infrared luminosity and star formation rate of galaxies using the spectral energy distribution templates based on one band, AKARI$9\, \mu$m. We classify galaxies into three different star formation modes (i.e. starbursts, main-sequence, and quiescent galaxies) and calculate the merger fractions for each. We find that the merger fractions of galaxies increase with redshift at z < 0.6. The merger fractions of starbursts are higher than those of main-sequence and quiescent galaxies in all redshift bins. We also examine the merger fractions of far-infrared-detected galaxies that have at least one detection from Herschel/Spectral and Photometric Imaging Receiver (SPIRE). We find that Herschel-detected galaxies have higher merger fraction compared to non-Herschel-detected galaxies, and both Herschel-detected and non-Herschel-detected galaxies show clearly different merger fractions depending on the star formation modes.

Original language	English
Pages (from-to)	3113-3124
Number of pages	12
Journal	Monthly Notices of the Royal Astronomical Society
Volume	507
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stab2090
State	Published - 1 Nov 2021

Keywords

galaxies: evolution
galaxies: formation
galaxies: spiral
galaxies: star formation
galaxies: starburst
infrared: galaxies

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10.1093/mnras/stab2090

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Kim, E., Hwang, H. S., Jeong, W. S., Kim, S. J., Burgarella, D., Goto, T., Hashimoto, T., Jo, Y. S., Lee, J. C., Malkan, M., Pearson, C., Shim, H., Toba, Y., Ho, S. C. C., Santos, D. J., Ikeda, H., Kim, H. K., Miyaji, T., Matsuhara, H., ... Wang, T. W. (2021). The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP-Wide Field. Monthly Notices of the Royal Astronomical Society, 507(3), 3113-3124. https://doi.org/10.1093/mnras/stab2090

@article{2dacca3cb9e74b399ec64df507dcfa15,

title = "The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP-Wide Field",

abstract = "We study the galaxy merger fraction and its dependence on star formation mode in the 5.4 deg2 of the North Ecliptic Pole-Wide Field. We select 6352 galaxies with AKARI 9 $\mu$m detections, and identify mergers among them using the Gini coefficient and M20 derived from the Subaru/Hyper Suprime-Cam (HSC) optical images. We obtain the total infrared luminosity and star formation rate of galaxies using the spectral energy distribution templates based on one band, AKARI$9\, \mu$m. We classify galaxies into three different star formation modes (i.e. starbursts, main-sequence, and quiescent galaxies) and calculate the merger fractions for each. We find that the merger fractions of galaxies increase with redshift at z < 0.6. The merger fractions of starbursts are higher than those of main-sequence and quiescent galaxies in all redshift bins. We also examine the merger fractions of far-infrared-detected galaxies that have at least one detection from Herschel/Spectral and Photometric Imaging Receiver (SPIRE). We find that Herschel-detected galaxies have higher merger fraction compared to non-Herschel-detected galaxies, and both Herschel-detected and non-Herschel-detected galaxies show clearly different merger fractions depending on the star formation modes.",

keywords = "galaxies: evolution, galaxies: formation, galaxies: spiral, galaxies: star formation, galaxies: starburst, infrared: galaxies",

author = "Eunbin Kim and Hwang, {Ho Seong} and Jeong, {Woong Seob} and Kim, {Seong Jin} and Denis Burgarella and Tomotsugu Goto and Tetsuya Hashimoto and Jo, {Young Soo} and Lee, {Jong Chul} and Matthew Malkan and Chris Pearson and Hyunjin Shim and Yoshiki Toba and Ho, {Simon C.C.} and Santos, {Daryl Joe} and Hiroyuki Ikeda and Kim, {Helen K.} and Takamitsu Miyaji and Hideo Matsuhara and Nagisa Oi and Toshinobu Takagi and Wang, {Ting Wen}",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

year = "2021",

month = nov,

day = "1",

doi = "10.1093/mnras/stab2090",

language = "English",

volume = "507",

pages = "3113--3124",

journal = "Monthly Notices of the Royal Astronomical Society",

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Kim, E, Hwang, HS, Jeong, WS, Kim, SJ, Burgarella, D, Goto, T, Hashimoto, T, Jo, YS, Lee, JC, Malkan, M, Pearson, C, Shim, H, Toba, Y, Ho, SCC, Santos, DJ, Ikeda, H, Kim, HK, Miyaji, T, Matsuhara, H, Oi, N, Takagi, T & Wang, TW 2021, 'The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP-Wide Field', Monthly Notices of the Royal Astronomical Society, vol. 507, no. 3, pp. 3113-3124. https://doi.org/10.1093/mnras/stab2090

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T1 - The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP-Wide Field

AU - Kim, Eunbin

AU - Hwang, Ho Seong

AU - Jeong, Woong Seob

AU - Kim, Seong Jin

AU - Burgarella, Denis

AU - Goto, Tomotsugu

AU - Hashimoto, Tetsuya

AU - Jo, Young Soo

AU - Lee, Jong Chul

AU - Malkan, Matthew

AU - Pearson, Chris

AU - Shim, Hyunjin

AU - Toba, Yoshiki

AU - Ho, Simon C.C.

AU - Santos, Daryl Joe

AU - Ikeda, Hiroyuki

AU - Kim, Helen K.

AU - Miyaji, Takamitsu

AU - Matsuhara, Hideo

AU - Oi, Nagisa

AU - Takagi, Toshinobu

AU - Wang, Ting Wen

PY - 2021/11/1

Y1 - 2021/11/1

N2 - We study the galaxy merger fraction and its dependence on star formation mode in the 5.4 deg2 of the North Ecliptic Pole-Wide Field. We select 6352 galaxies with AKARI 9 $\mu$m detections, and identify mergers among them using the Gini coefficient and M20 derived from the Subaru/Hyper Suprime-Cam (HSC) optical images. We obtain the total infrared luminosity and star formation rate of galaxies using the spectral energy distribution templates based on one band, AKARI$9\, \mu$m. We classify galaxies into three different star formation modes (i.e. starbursts, main-sequence, and quiescent galaxies) and calculate the merger fractions for each. We find that the merger fractions of galaxies increase with redshift at z < 0.6. The merger fractions of starbursts are higher than those of main-sequence and quiescent galaxies in all redshift bins. We also examine the merger fractions of far-infrared-detected galaxies that have at least one detection from Herschel/Spectral and Photometric Imaging Receiver (SPIRE). We find that Herschel-detected galaxies have higher merger fraction compared to non-Herschel-detected galaxies, and both Herschel-detected and non-Herschel-detected galaxies show clearly different merger fractions depending on the star formation modes.

AB - We study the galaxy merger fraction and its dependence on star formation mode in the 5.4 deg2 of the North Ecliptic Pole-Wide Field. We select 6352 galaxies with AKARI 9 $\mu$m detections, and identify mergers among them using the Gini coefficient and M20 derived from the Subaru/Hyper Suprime-Cam (HSC) optical images. We obtain the total infrared luminosity and star formation rate of galaxies using the spectral energy distribution templates based on one band, AKARI$9\, \mu$m. We classify galaxies into three different star formation modes (i.e. starbursts, main-sequence, and quiescent galaxies) and calculate the merger fractions for each. We find that the merger fractions of galaxies increase with redshift at z < 0.6. The merger fractions of starbursts are higher than those of main-sequence and quiescent galaxies in all redshift bins. We also examine the merger fractions of far-infrared-detected galaxies that have at least one detection from Herschel/Spectral and Photometric Imaging Receiver (SPIRE). We find that Herschel-detected galaxies have higher merger fraction compared to non-Herschel-detected galaxies, and both Herschel-detected and non-Herschel-detected galaxies show clearly different merger fractions depending on the star formation modes.

KW - galaxies: evolution

KW - galaxies: formation

KW - galaxies: spiral

KW - galaxies: star formation

KW - galaxies: starburst

KW - infrared: galaxies

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U2 - 10.1093/mnras/stab2090

DO - 10.1093/mnras/stab2090

M3 - Article

AN - SCOPUS:85117049194

SN - 0035-8711

VL - 507

SP - 3113

EP - 3124

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP-Wide Field

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Keywords

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