Journal ArticleDOI
Metal-poor stars. III - On the evolution of horizontal-branch stars
Icko Iben,Robert T. Rood +1 more
TLDR
Horizontal branch stars evolution based on mass distributions from comparison with giant branch, investigating evolutionary track characteristics during core helium burning was studied in this paper, where the authors proposed a model of the evolution of horizontal branch stars.Abstract:
Horizontal branch stars evolution based on mass distributions from comparison with giant branch, investigating evolutionary track characteristics during core helium burningread more
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Journal ArticleDOI
On the determination of neutrino mass-a critical status report
C. R. Ching,T. H. Ho +1 more
TL;DR: In this article, the present situation in neutrino mass determination is summarized and critically analyzed from various points of view, and it is shown that from various kinds of experimental measurements and astrophysical observations combined with the relevant analysis, the non-zero mass of neutrinos is plausible.
Journal ArticleDOI
Period Analysis of Seven Field ab-type RR Lyrae Stars Based on O − C Diagrams: Cyclic Variations and Long-term Period Changes
Journal ArticleDOI
A cautionary tale of interpreting O-C diagrams: period instability in a classical RR Lyr Star Z CVn mimicking as a distant companion
Marek Skarka,Jiří Liška,Radek Dřevěný,E. Guggenberger,Ádám Sódor,Thomas G. Barnes,Katrien Kolenberg +6 more
TL;DR: In this paper, the authors present a comprehensive study of Z CVn, an RR Lyrae star that shows long-term cyclic variations of its pulsation period, using original photometric and spectroscopic measurements and using available maximum times spanning more than one century.
BV Photometry of RR Lyrae Variables in the Globular Cluster NGC 5466
TL;DR: In this article, BV CCD photometry, light curves, and ephemerides for 20 RR Lyrae variables and the anomalous Cepheid, V19, in the globular cluster NGC 5466 are presented.
Journal ArticleDOI
MORGOTH: incorporating horizontal branch modelling into star formation history determinations
TL;DR: In this article, a new method that incorporates the horizontal branch morphology into synthetic colour-magnitude diagram based star formation history determinations is presented. But this method is limited to the case of the early asymptothic giant branch.