NDLI: The effect of Helium-enhanced stellar populations on the ultraviolet upturn phenomenon of early-type galaxies

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The effect of Helium-enhanced stellar populations on the ultraviolet upturn phenomenon of early-type galaxies

Content Provider	Scilit
Author	Chung, Chul Yoon, Suk-Jin Lee, Young-Wook
Copyright Year	2012
Description	We present new population synthesis models (Chung et al.2011) for quiescent early-type galaxies (ETGs) with UV-upturn phenomenon using relatively metal-poor and helium-enhanced subpopulations in the model. We find that the presence of helium-enhanced subpopulations in ETGs can naturally reproduce the strong UV-upturns observed in giant elliptical galaxies (Figure 1. left panel), without invoking unrealistically old ages (Park & Lee 1997). Our models with helium-enhanced subpopulations also predict that the well-known Burstein relation can be explained by the fraction of helium-enhanced subpopulation, the mean age, and the mean metallicity of the underlying stellar populations (Figure 1. right panel).
Related Links	https://www.cambridge.org/core/services/aop-cambridge-core/content/view/8CE088798F2A0259DA4B09D71DEB7691/S1743921314004839a.pdf/div-class-title-the-effect-of-helium-enhanced-stellar-populations-on-the-ultraviolet-upturn-phenomenon-of-early-type-galaxies-div.pdf
Ending Page	121
Page Count	1
Starting Page	121
ISSN	17439213
e-ISSN	17439221
DOI	10.1017/s1743921314004839
Journal	Proceedings of the International Astronomical Union
Issue Number	H16
Volume Number	10
Language	English
Publisher	Cambridge University Press (CUP)
Publisher Date	2012-08-01
Access Restriction	Open
Subject Keyword	Proceedings of the International Astronomical Union Astronomy and Astrophysics Elliptical and Lenticular Evolution Stellar Content Galaxies
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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