Elliptical Galaxy4 [석사학위논문] Jong-Hoon Jeong et al., 2018, Near-Infrared Color-Metallicity Relation for Globular ClusterSystem in Elliptical Galaxy NGC 4649 # 세줄 요약 # Use Optical and NIR photometry of M60 GC system to examine the GC color distribution morphologies. Through Optical color & Opt-NIR color relation, we try to deduce the exact shape of CMR, then We use YEPS model to derive the metallicity distribution function (MDF) & color-metallicity relation (CMR) of NGC 4649 GC (* Why NIR Observation? ⇒ directly measures the metallicity of GCs). Our .. 2023. 8. 30. Chies-Santos et al., 2012, An optical/NIR survey of globular clusters in early-type galaxies. III. On the colour bimodality of globular cluster systems # 세줄 요약 # We study optical/near-infrared (NIR) colour distributions of the GC systems in 14 E/S0 galaxies. We find that double-peaked colour distributions are more commonly seen in optical than in optical/NIR colours A bimodal optical colour distribution is not necessarily an indication of an underlying bimodal metallicity distribution. # 상세 리뷰 # 1. Introduction AIM: Study optical/NIR color dist.. 2021. 10. 10. Cho et al., 2016, The Globular Cluster System of the Coma cD Galaxy NGC 4874 from Hubble Space Telescope ACS and WFC3/IR Imaging # 세줄요약 # Coma 은하단의 cD 타입 은하인 NGC 4874의 구상성단계를 연구한 논문으로 가시광선(Optical) 영역에서는 HST/ACS를 사용하여 g, I 파장대에서 관측하였고, 근적외선(Near-IR) 영역에서는 HST/WFC3를 사용하여 H 파장대에서 관측하였다. Optical color인 (g-I)에서는 구상성단(GC: Globular Cluster)들의 Bimodality가 나타나나, Optical-NIR color인 (I-H)에서는 GC들의 Bimodality가 약화되는 것으로 보인다. Metallicity에 더 민감한 Optical-NIR color에서는 Bimodality가 약화된 것으로 보아 Nonlinear Color-Metallicity Relation을 가지는 것으로 유추.. 2020. 7. 28. Yoon et al., 2006, Explaining the Color Distributions of Globular Cluster Systems in Elliptical Galaxies # 세줄 요약 # The globular clusters(GC) in most large elliptical galaxies have color-bimodal distribution that means the presence of two cluster subpopulations that have different geneses(ex. Milky Way). But Horizontal-Branch(HB) stars can make nonlinear nature of the metallicity-to-color transformation, a coeval group of old clusters with a unimodal metallicity spread can exhibit color bimodality. .. 2020. 7. 24. 이전 1 다음
