On the Bimodal Distributions of Horizontal Branches [PDF]
Symposium - International Astronomical Union, 1988 New synthetic horizontal branch (HB) models are presented for some globular clusters known to have bimodal HB distributions. These models are based on new Yale HB evolutionary tracks for Y=0.25 and the core masses appropriate for the compositions. The distribution of stellar masses along the HB is given by a slightly modified version of Rood's (1973 ...
Robert Zinn +2 more
openaire +2 more sources
CONSTRAINTS ON THE DISTANCE MODULI, HELIUM AND METAL ABUNDANCES, AND AGES OF GLOBULAR CLUSTERS FROM THEIR RR LYRAE AND NON-VARIABLE HORIZONTAL-BRANCH STARS. I. M3, M15, AND M92 [PDF]
, 2016 Up-to-date isochrones, zero-age horizontal-branch (ZAHB) loci, and evolutionary tracks for core He-burning stars are applied to the color–magnitude diagrams of M3, M15, and M92, focusing in particular on their RR Lyrae populations.
D. VandenBerg +2 more
semanticscholar +1 more source
Bimodal Distributions on the Horizontal Branch [PDF]
Symposium - International Astronomical Union, 1988 We present preliminary versions of log g - log Teff diagrams for a number of clusters with gaps in their blue horizontal branches and for two normal clusters.
Deborah A. Crocker, Robert T. Rood
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The mosaic multiple stellar populations in ω Centauri: the horizontal branch and the main sequence [PDF]
, 2016 We interpret the stellar population of $\omega$ Centauri by means of a population synthesis analysis, following the most recent observational guidelines for input metallicities, helium and [(C+N+O)/Fe] contents.
M. Tailo +4 more
semanticscholar +1 more source
The Hot End of Evolutionary Horizontal Branches [PDF]
The Astrophysical Journal, 1995 postscript file of 10 pages plus 1 tables,rep.1 5 figures will be added later as postscript file The tex file and the other two not postscript figures are available upon request at scilla@vaxfe.fe.infn.it, rep ...
CASTELLANI V +2 more
openaire +4 more sources
Characterizing stellar halo populations II: the age gradient in blue horizontal-branch stars [PDF]
, 2016 The distribution of Milky Way halo blue horizontal-branch (BHB) stars is examined using action-based extended distribution functions (EDFs) that describe the locations of stars in phase space, metallicity, and age.
P. Das, Angus Williams, J. Binney
semanticscholar +1 more source
Blue Horizontal Branch Stars in M92 [PDF]
The Astronomical Journal, 1997 14 pages with 2 figures, LateX, to be published in the Astronomical ...
Cohen, J. G., McCarthy, J. K.
openaire +6 more sources
RR Lyrae stars and the horizontal branch of NGC 5904 (M5) [PDF]
, 2016 We report the distance and [Fe/H] value for the globular cluster NGC 5904 (M5) derived from the Fourier decomposition of the light curves of selected RRab and RRc stars.
A. Arellano Ferro +5 more
semanticscholar +1 more source
Branching angles of several cocoa genotypes and their effect on determining optimum plant spacing
Coffee and Cocoa Research Journal, 2021 Identification of the type of branching architecture will be one for the considerations in determining specific spacing recommendations for cocoa plantation.
Bayu Setyawan +3 more
doaj +1 more source
An HST/WFC3 view of stellar populations on the horizontal branch of NGC 2419 [PDF]
, 2015 We use images acquired with the Hubble Space Telescope Wide Field Camera 3 and new models to probe the Horizontal Branch (HB) population of the We use images acquired with the Hubble Space Telescope Wide Field Camera 3 and new models to probe the ...
M. Criscienzo +6 more
semanticscholar +1 more source