통합 검색 | Korea Science

Suh, Kyung-Won;Kim, Mi-Ryang
- Journal of Astronomy and Space Sciences
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- 제20권3호
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- pp.175-184
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- 2003
To investigate the SEDs of galaxies considering the dust extinction processes in the galactic disks, we present the population synthesis models for normal galaxies with dusty disks. We use PEGASE (Fioc & Rocca-Volmerange 1997) to model them with standard input parameters for stars and new dust parameters. We find that the model results are strongly dependent on the dust parameters as well as other parameters (e.g. star formation history). We compare the model results with the observations and discuss about the possible explanations. We find that the dust opacity functions derived from studies of asymptotic giant branch stars are useful for modeling a galaxy with a dusty disk.
https://doi.org/10.5140/JASS.2003.20.3.175 인용 PDF KSCI

이상윤;정철;김학섭;윤석진
- 천문학회보
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- 제36권2호
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- pp.75.2-75.2
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- 2011
We present a new, year 2011 version of the Yonsei Evolutionary Population Synthesis (YEPS 2011) model for simple stellar populations. The standard YEPS employs the most up-to-date Yonsei-Yale stellar evolutionary tracks and the BaSeL flux libraries. The spectro-photometric model data of the entire parameter space are available at http://web.yonsei.ac.kr/cosmic/data/YESP.htm.
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Chung, Chul;Yoon, Suk-Jin;Lee, Young-Wook
- 천문학회보
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- 제38권2호
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- pp.38.1-38.1
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- 2013
We present the Yonsei evolutionary population synthesis (YEPS) models based on the high-resolution empirical spectral energy distributions (SEDs). We have adopted the MILES library in the optical wavelength, and our new models based on the MILES library show good agreements with our previous models presented in the YEPS I. The effect of hot horizontal-branch (HB) stars on the integrated properties of simple stellar populations (SSPs) is again confirmed by our models based on empirical SEDs. In addition, we have extended our empirical models to the near-IR wavelength and predicted the strengths of the calcium II triplet (CaT) and the Paschen triplet (PaT) based on the INDO-US and the Cenarro library. We find that the effect of HB stars and the age of SSPs on the CaT is almost negligible. On the other hands, the PaT models are very sensitive to the existence of hot stars, e.g., HB stars and young turn-off stars, and show very similar results with Balmer lines. Interestingly, the CaT distribution of GCs in NGC 1407, which is at odds with the optical (B-I) color distribution, can be explained by the unique feature of the CaT-[Fe/H] relations that show almost the same equivalent widths in the metal-rich regime. We will also discuss the impact of the second-generation populations on the strength of the CaT.
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