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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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Title: The evolution of merger fraction of galaxies at z < 0.6 depending on the star formation mode in the AKARI NEP Wide field
Authors: Kim, Eunbin, Hwang, Ho Seong, Jeong, Woong-Seob, Kim, Seong Jin, Burgarella, Denis, Goto, Tomotsugu, Hashimoto, Tetsuya, Jo, Young-Soo, Lee, Jong Chul, Malkan, Matthew, Pearson, Chris, Shim, Hyunjin, Toba, Yoshiki, Ho, Simon C. -C., Santos, Daryl Joe, Ikeda, Hiroyuki, Kim, Helen K., Miyaji, Takamitsu, Matsuhara, Hideo, Oi, Nagisa, Takagi, Toshinobu, Wang, Ting-Wen
Publication Year: 2021
Collection: Astrophysics
Subject Terms: Astrophysics - Astrophysics of Galaxies
More Details: We study the galaxy merger fraction and its dependence on star formation mode in the5.4 square degrees of the North Ecliptic Pole-Wide field. We select 6352 galaxies withAKARI 9{\mu}m detections, and identify mergers among them using the Gini coefficientand M20derived from the Subaru/HSC optical images. We obtain the total infraredluminosity and star formation rate of galaxies using the spectral energy distributiontemplates based on one band, AKARI 9{\mu}m. We classify galaxies into three differentstar formation modes (i.e. starbursts, main sequence, and quiescent galaxies) andcalculate the merger fractions for each. We find that the merger fractions of galaxiesincrease with redshift atz<0.6. The merger fractions of starbursts are higher thanthose of main sequence and quiescent galaxies in all redshift bins. We also examinethe merger fractions of far-infrared detected galaxies which have at least one detectionfromHerschel/SPIRE. We find thatHerscheldetected galaxies have higher mergerfraction compared to non-Herscheldetected galaxies, and bothHerscheldetected andnon-Herscheldetected galaxies show clearly different merger fractions depending onthe star formation modes.
Comment: 13 pages, 11 figures, Accepted for publication by MNRAS
Document Type: Working Paper
DOI: 10.1093/mnras/stab2090
Access URL: http://arxiv.org/abs/2108.07125
Accession Number: edsarx.2108.07125
Database: arXiv
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  Data: The evolution of merger fraction of galaxies at z &lt; 0.6 depending on the star formation mode in the AKARI NEP Wide field
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  Data: We study the galaxy merger fraction and its dependence on star formation mode in the5.4 square degrees of the North Ecliptic Pole-Wide field. We select 6352 galaxies withAKARI 9{\mu}m detections, and identify mergers among them using the Gini coefficientand M20derived from the Subaru/HSC optical images. We obtain the total infraredluminosity and star formation rate of galaxies using the spectral energy distributiontemplates based on one band, AKARI 9{\mu}m. We classify galaxies into three differentstar formation modes (i.e. starbursts, main sequence, and quiescent galaxies) andcalculate the merger fractions for each. We find that the merger fractions of galaxiesincrease with redshift atz&lt;0.6. The merger fractions of starbursts are higher thanthose of main sequence and quiescent galaxies in all redshift bins. We also examinethe merger fractions of far-infrared detected galaxies which have at least one detectionfromHerschel/SPIRE. We find thatHerscheldetected galaxies have higher mergerfraction compared to non-Herscheldetected galaxies, and bothHerscheldetected andnon-Herscheldetected galaxies show clearly different merger fractions depending onthe star formation modes.&lt;br /&gt;Comment: 13 pages, 11 figures, Accepted for publication by MNRAS
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      – TitleFull: 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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