KYDISC: Galaxy Morphology, Quenching, and Mergers in the Cluster Environment

Sree Oh, Keunho Kim, Joon Hyeop Lee, Yun Kyeong Sheen, Minjin Kim, Chang H. Ree, Luis C. Ho, Jaemann Kyeong, Eon Chang Sung, Byeong Gon Park, Sukyoung K. Yi

Research output: Contribution to journalReview article

3 Citations (Scopus)

Abstract

We present the KASI-Yonsei Deep Imaging Survey of Clusters targeting 14 clusters at 0.015 ≲ z ≲ 0.144 using the Inamori Magellan Areal Camera and Spectrograph on the 6.5 m Magellan Baade telescope and the MegaCam on the 3.6 m Canada-France-Hawaii Telescope. We provide a catalog of cluster galaxies that lists magnitudes, redshifts, morphologies, bulge-to-total ratios, and local density. Based on the 1409 spectroscopically confirmed cluster galaxies brighter than -19.8 in the r band, we study galaxy morphology, color, and visual features generated by galaxy mergers. We see a clear trend between morphological content and cluster velocity dispersion, which was not presented by previous studies using local clusters. Passive spirals are preferentially found in a highly dense region (i.e., cluster center), indicating that they have gone through environmental quenching. In deep images (μ r′ ∼ 27 ), 20% of our sample shows signatures of recent mergers, which is not expected from theoretical predictions and a low frequency of ongoing mergers in our sample (∼4%). Such a high fraction of recent mergers in the cluster environment supports a scenario that the merger events that made the features have preceded the galaxy accretion into the cluster environment. We conclude that mergers affect a cluster population mainly through the preprocessing of recently accreted galaxies.

Original languageEnglish
Article number14
JournalAstrophysical Journal, Supplement Series
Volume237
Issue number1
DOIs
Publication statusPublished - 2018 Jul

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merger
quenching
galaxies
targeting
telescopes
accretion
preprocessing
France
Canada
lists
spectrographs
catalogs
prediction
cameras
signatures
low frequencies
trends
color
predictions

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Oh, Sree ; Kim, Keunho ; Lee, Joon Hyeop ; Sheen, Yun Kyeong ; Kim, Minjin ; Ree, Chang H. ; Ho, Luis C. ; Kyeong, Jaemann ; Sung, Eon Chang ; Park, Byeong Gon ; Yi, Sukyoung K. / KYDISC : Galaxy Morphology, Quenching, and Mergers in the Cluster Environment. In: Astrophysical Journal, Supplement Series. 2018 ; Vol. 237, No. 1.
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abstract = "We present the KASI-Yonsei Deep Imaging Survey of Clusters targeting 14 clusters at 0.015 ≲ z ≲ 0.144 using the Inamori Magellan Areal Camera and Spectrograph on the 6.5 m Magellan Baade telescope and the MegaCam on the 3.6 m Canada-France-Hawaii Telescope. We provide a catalog of cluster galaxies that lists magnitudes, redshifts, morphologies, bulge-to-total ratios, and local density. Based on the 1409 spectroscopically confirmed cluster galaxies brighter than -19.8 in the r band, we study galaxy morphology, color, and visual features generated by galaxy mergers. We see a clear trend between morphological content and cluster velocity dispersion, which was not presented by previous studies using local clusters. Passive spirals are preferentially found in a highly dense region (i.e., cluster center), indicating that they have gone through environmental quenching. In deep images (μ r′ ∼ 27 ), 20{\%} of our sample shows signatures of recent mergers, which is not expected from theoretical predictions and a low frequency of ongoing mergers in our sample (∼4{\%}). Such a high fraction of recent mergers in the cluster environment supports a scenario that the merger events that made the features have preceded the galaxy accretion into the cluster environment. We conclude that mergers affect a cluster population mainly through the preprocessing of recently accreted galaxies.",
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Oh, S, Kim, K, Lee, JH, Sheen, YK, Kim, M, Ree, CH, Ho, LC, Kyeong, J, Sung, EC, Park, BG & Yi, SK 2018, 'KYDISC: Galaxy Morphology, Quenching, and Mergers in the Cluster Environment', Astrophysical Journal, Supplement Series, vol. 237, no. 1, 14. https://doi.org/10.3847/1538-4365/aacd47

KYDISC : Galaxy Morphology, Quenching, and Mergers in the Cluster Environment. / Oh, Sree; Kim, Keunho; Lee, Joon Hyeop; Sheen, Yun Kyeong; Kim, Minjin; Ree, Chang H.; Ho, Luis C.; Kyeong, Jaemann; Sung, Eon Chang; Park, Byeong Gon; Yi, Sukyoung K.

In: Astrophysical Journal, Supplement Series, Vol. 237, No. 1, 14, 07.2018.

Research output: Contribution to journalReview article

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T2 - Galaxy Morphology, Quenching, and Mergers in the Cluster Environment

AU - Oh, Sree

AU - Kim, Keunho

AU - Lee, Joon Hyeop

AU - Sheen, Yun Kyeong

AU - Kim, Minjin

AU - Ree, Chang H.

AU - Ho, Luis C.

AU - Kyeong, Jaemann

AU - Sung, Eon Chang

AU - Park, Byeong Gon

AU - Yi, Sukyoung K.

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AB - We present the KASI-Yonsei Deep Imaging Survey of Clusters targeting 14 clusters at 0.015 ≲ z ≲ 0.144 using the Inamori Magellan Areal Camera and Spectrograph on the 6.5 m Magellan Baade telescope and the MegaCam on the 3.6 m Canada-France-Hawaii Telescope. We provide a catalog of cluster galaxies that lists magnitudes, redshifts, morphologies, bulge-to-total ratios, and local density. Based on the 1409 spectroscopically confirmed cluster galaxies brighter than -19.8 in the r band, we study galaxy morphology, color, and visual features generated by galaxy mergers. We see a clear trend between morphological content and cluster velocity dispersion, which was not presented by previous studies using local clusters. Passive spirals are preferentially found in a highly dense region (i.e., cluster center), indicating that they have gone through environmental quenching. In deep images (μ r′ ∼ 27 ), 20% of our sample shows signatures of recent mergers, which is not expected from theoretical predictions and a low frequency of ongoing mergers in our sample (∼4%). Such a high fraction of recent mergers in the cluster environment supports a scenario that the merger events that made the features have preceded the galaxy accretion into the cluster environment. We conclude that mergers affect a cluster population mainly through the preprocessing of recently accreted galaxies.

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