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Yonsei Evolutionary Population Synthesis (YEPS) Model -III. Spectrophotometric Evolutions of Simple Stellar Population Models based on Empirical Spectra
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  • Yonsei Evolutionary Population Synthesis (YEPS) Model -III. Spectrophotometric Evolutions of Simple Stellar Population Models based on Empirical Spectra
  • Yonsei Evolutionary Population Synthesis (YEPS) Model -III. Spectrophotometric Evolutions of Simple Stellar Population Models based on Empirical Spectra
저자명
Chung. Chul,Yoon. Suk-Jin,Lee. Young-Wook
간행물명
천문학회보
권/호정보
2013년|38권 2호|pp.38-38 (1 pages)
발행정보
한국천문학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

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.