4.3k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Seoul National UniversityKR1.2k papers
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11 papers · 2 filters
3D convection simulations of the outer layers of the Sun using realistic physics
F. J. Robinson, P. Demarque, L. H. Li +4
This paper describes a series of 3D simulations of shallow inefficient convection in the outer layers of the Sun. The computational domain is a closed box containing the convection…
Uncertainties of Synthetic Integrated Colors as Age Indicators
Sukyoung K. Yi
We investigate the uncertainties in the synthetic integrated colors of simple stellar populations. Three types of uncertainties are from the stellar models, the population synthesi…
The Y^2 Stellar Evolutionary Tracks
Sukyoung K. Yi, Yong -Cheol Kim, Pierre Demarque
We present a database of the latest stellar models of the (Yonsei-Yale) collaboration. This database contains the stellar evolutionary tracks from the pre-main-sequence birth…
Blue Horizontal-Branch Stars and Simple Stellar Populations
Hyun-chul Lee, Young-Wook Lee, Brad K. Gibson
The effects of blue horizontal-branch (HB) stars on the integrated spectrophotometric indices of simple stellar populations (SSPs) are addressed. Synthetic spectra are drawn from a…
The YY Isochrones for alpha-element Enhanced Mixtures
Yong -Cheol Kim, Pierre Demarque, Sukyoung K. Yi +1
We present a new set of isochrones in which the effect of the alpha-element enhancement is fully incorporated. These isochrones are an extension of the already published set of YY…
Horizontal-Branch Morphology and the Photometric Evolution of Old Stellar Populations
Hyun-chul Lee, Young-Wook Lee, Brad K. Gibson
Theoretical integrated broad-band colors ranging from far-UV to near-IR have been computed for old stellar systems from our evolutionary population synthesis code. These models tak…
An Aligned Stream of Low-Metallicity Clusters in the Halo of the Milky Way
Suk-Jin Yoon, Young-Wook Lee
One of the long-standing problems in modern astronomy is the curious division of Galactic globular clusters, the "Oosterhoff dichotomy," according to the properties of their RR Lyr…
Chemical Abundances Of Three Metal-Poor Globular Clusters (NGC 6287, NGC 6293, And NGC 6541) In The Inner Halo
Jae-Woo Lee, Bruce W. Carney
We present a chemical abundance study of three inner old halo clusters NGC 6287, NGC 6293, and NGC 6541, finding [Fe/H] = -2.01 +/- 0.05, -1.99 +/- 0.02, and -1.76 +/- 0.02, respec…
Polarisation of the Broad H alpha Wing in Symbiotic Stars
Jerry Jaiyul Yoo, Jih-Yong Bak, Hee-Won Lee
In many symbiotic stars there appear broad wings around H alpha, of which the formation mechanism proposed thus far includes a fast outflow, the inner accretion disc motion, electr…
Infrared Photometry of the Globular Cluster Palomar 6
Jae-Woo Lee, Bruce W. Carney
We present JHK photometry of Palomar 6. Our photometric measurements range from the RGB-tip to 2 mag below the RHB and our CMDs show that Palomar~6 appears to have a well-defined R…
Galaxy Evolution from Emission Linewidths
Stephane Courteau, Young-Jong Sohn
The major thrust of the Tully-Fisher (TF) surveys of distant galaxies is the measurement of linewidths rather than mere redshifts or colors. Linewidths are a measure of galaxy mass…