Jian, Hung-Yu 簡鴻裕

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Top: Median sSFR of SF galaxies as a function of redshift in the field (dotted), groups (dashed), and clusters (solid). Bottom: The logarithmic ratio of sSFR for group to field galaxies (dashed), and for cluster to field galaxies (solid). At fixed masses, the decrease
level is very similar for cluster galaxies or group galaxies in different redshift ranges, and the reduction offset is seen <0.4 dex for clusters and <0.2 dex for groups. That is, the
decrease of sSFRs for the group to field galaxies and for the cluster to field ones is independent of redshift, implying an universal slow quenching mechanism acting in the dense environments since z ~ 1.1.

First results on the cluster galaxy population from the Subaru Hyper Suprime-Cam survey. I. The role of group or cluster environment in star formation quenching from z = 0.2 to 1.1

$Top: The quiescent fraction from the radial (solid lines) and density (dashed lines) contribution. Three stellar mass ranges are plotted: 10.1<log10(Ms/Me)<10.5 (green), 10.5<log10(Ms/Me)<10.9 (blue), and log10(Ms/Me)>10.9 (gold). Bottom: The excess of the quiescent fraction (Δ) from the radial (solid lines) and density (dashed lines) contribution relative to the fraction from the field. For less massive galaxies, the Δ in groups or clusters has a radial gradient, implying that the location of the less massive galaxies in their parent halo has an additional effect on their star formation quenching.$

The Pan-STARRS1 Medium-deep Survey: Star Formation Quenching in Group and Cluster Environments

Jian, Hung-Yu Support Scientist
	Office: ASMAB 1406 TEL: +886-2-2366-5467 FAX: +886-2-2367-7849 Email: hyjianasiaa.sinica.edu.tw

Education and Positions

Postdoc, NTU (2010~2014)
Ph.D, NTU (2000~2010)

Research Interests

Galaxy Formation and Evolution, Galaxy Mergers, Galaxy Groups and Clusters, Environmental impact on galaxies and their evolution

Journal Papers affiliated with ASIAA

Jian H-Y; Lin L; Hsieh B-C; Umetsu K; Lopez-Coba C; Oguri M; Bottrell C; Toba Y; Koyama Y; Chang Y-Y; Kodama T; Komiyama Y; More S; Lin K-Y; Nishizawa AJ; Tanaka I, "Radial and Local Density Dependence of Star Formation Properties in Galaxy Clusters from the Hyper Suprime-Cam Survey" , ApJ: 957(2), id.85 (14pp), Nov, 2023 [SCI] ( ADS | Fulltext )
Jian H-Y; Lin L; Hsieh B-C; Lin K-Y; Umetsu K; Lopez-Coba C; Koyama Y; Hsu C-H; Su Y-C; Chang Y-Y; Kodama T; Komiyama Y; More S; Nishizawa A J; Oguri M; Tanaka I, "Star Formation Properties of Sloan Digital Sky Survey BOSS Void Galaxies in the Hyper Suprime-Cam Survey" , ApJ: 926(2), id.115 (13 pp), Feb, 2022 [SCI] ( ADS | Fulltext )
Wang W-H; Foucaud S; Hsieh B-C; Jian H-Y; Lin L; Lin Y-T; Coupon J; Hashimoto Y; Ouchi M; Shimasaku K; Ohyama Y; Umetsu K; Wang S-Y; Chang T-C, "MUSUBI (MegaCam Ultra-deep Survey: u*-band Imaging) Data for the COSMOS and SXDS Fields" , ApJS: 260(2), id.54 (15 pp), June, 2022 [SCI] ( ADS | Fulltext )
Jian H-Y; Lin L; Koyama Y; ...Umetsu K; Hsieh B-C; Higuchi Y; ...; Chang YY, "Redshift Evolution of Green Valley Galaxies in Different Environments from the Hyper Suprime-Cam Survey" , ApJ: 894(2), id.125 (18pp.), May, 2020 [SCI] ( ADS | Fulltext )
Aihara H; Arimoto N; Armstrong R; ...; Chan JHH; ...; Ho PTP; Hsieh B-C; Huang K; Huang S; Ikeda H; Imanishi M; ...; Jian H-Y; ... ; Lin L; Lin Y-T; ...; Suyu SH; ...; Toba Y; ...; Umetsu K; ...; Wang S-Y; Wang W-H; Wong KC; et al., "The Hyper Suprime-Cam SSP Survey: Overview and Survey Design" , PASJ: 70(SP1), S4, Jan, 2018 [SCI] ( ADS | Fulltext )
Aihara H; Armstrong R; Bickerton S; ...; Coupon J; ...; ...; Wang S-Y; ...; Ho PTP; Hsieh B-C; ...; Jian H-Y; ...; Lin L; Lin Y-T; ...; Toba Y; ...; Umetsu K; Urata, Yuji; et al., "First Data Release of the Hyper Suprime-Cam Subaru Strategic Program" , PASJ: 70(SP1), S8, Jan, 2018 [SCI] ( ADS | Fulltext )
Jian H-Y; Lin L; Oguri M; et al., "First results on the cluster galaxy population from the Subaru Hyper Suprime-Cam survey. I. The role of group or cluster environment in star formation quenching from z = 0.2 to 1.1" , PASJ: 70(SP1), S23 (15 pp.), Jan, 2018 [SCI] ( ADS | Fulltext )
Koyama Y; Hayashi M; Tanaka M; ...; Toba Y; Lin, L; Jian H-Y; et al., "The nature of Hα-selected galaxies along the huge cosmic web at z=0.4 revealed by Subaru Hyper Suprime-Cam survey" , PASJ: 70(SP1), S21, Jan, 2018 [SCI] ( ADS | Fulltext )
Nishizawa AJ; Oguri M; Oogi T; ...; Lin Y-T; ...; Jian H-Y, ...; Lin L; et al., "First results on the cluster galaxy population from the Subaru Hyper Suprime-Cam survey. II. Faint end color-magnitude diagrams and radial profiles of red and blue galaxies at 0.1 < z < 1.1" , PASJ: 70(SP1), S24, Jan, 2018 [SCI] ( ADS | Fulltext )
Oguri M; Lin Y-T; Lin S-C; ...; Hsieh B-C;...; Jian H-Y; Lin L; ...; Chiu I-N; Komiyama Y; Okura Y; et al., "An optically-selected cluster catalog at redshift 0.1 < z < 1.1 from the Hyper Suprime-Cam Subaru Strategic Program S16A data" , PASJ: 70(SP1), S20, Jan, 2018 [SCI] ( ADS | Fulltext )
Jian H-Y; Lin L; Lin K-Y; et al., "The Pan-STARRS1 Medium-deep Survey: Star Formation Quenching in Group and Cluster Environments" , ApJ: 845(1), 74, Aug 10, 2017 [SCI] ( ADS | Fulltext )
Lai CC; Lin L; Jian H-Y; ...; Chen CW; et al., "Can We Detect the Color-Density Relation with Photometric Redshifts?" , ApJ: 825(1), 40, July 1, 2016 [SCI] ( ADS | Fulltext )
Lin L; Capak P; Laigle C; ...; Hsieh B-C; Jian H-Y; et al., "The SPLASH survey: Quiescent galaxies are more strongly clustered but are not necessarily located in high-density environments" , ApJ: 817(2), 97, Feb, 2016 [SCI] ( ADS | Fulltext )
Lin Y-T; Mandelbaum R; Huang Y-H; ...; Jian H-Y; et al., "On Detecting Halo Assembly Bias with Galaxy Populations" , ApJ: 819(2), 119, March, 2016 [SCI] ( ADS | Fulltext )