Results 51 to 60 of about 180,740 (304)
Radial pulsations of red giant branch stars [PDF]
Astronomy Letters, 2017 We performed hydrodynamic computations of nonlinear stellar pulsations of population I stars at the evolutionary stages of the ascending red giant branch and the following luminosity drop due to the core helium flash. Red giants populating this region of the Hertzsprung--Russel diagram were found to be the fundamental mode pulsators.
openaire +4 more sources
Post-red-giant-branch Planetary Nebulae
, 2023 Common envelope events have been associated with the formation of a planetary nebulae since its proposition more than forty five years ago. However, until recently there have been doubts as to whether a common envelope while the donor is ascending the red giant branch, rather than the subsequent asymptotic red giant branch, would result in a planetary ...
Jones, David +2 more
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Dynamical Substructures of Galactic Globular Clusters III. NGC 7006 [PDF]
Journal of Astronomy and Space Sciences, 2005 To study the effects of giant population on dynamical substructures of the central region of NGC 7006, we examine the radial variations of ellipticity and position angle on BV stellar photometry using ellipse fitting technique.
Jonghwan Rhee, Young-Jong Sohn
doaj +1 more source
When do stars in 47 Tucanae lose their mass? [PDF]
, 2015 By examining the diffusion of young white dwarfs through the core of the globular cluster 47 Tucanae, we estimate the time when the progenitor star lost the bulk of its mass to become a white dwarf.
Antolini, Elisa +6 more
core +2 more sources
The distance to the Fornax Dwarf Spheroidal Galaxy [PDF]
, 2007 A large multicolour, wide-field photometric database of the Fornax dwarf spheroidal galaxy has been analysed using three different methods to provide revised distance estimates based on stellar populations in different age intervals.
Aaronson +55 more
core +1 more source
Machine Learning the Tip of the Red Giant Branch
, 2023 9 pages, 6 ...
Dennis, Mitchell, Sakstein, Jeremy
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, 2010 The Na-O anticorrelation seen in almost all globular clusters ever studied using high-resolution spectroscopy is now generally explained by the primordial pollution from the first generation of the intermediate-mass asymptotic giant branch stars to the ...
Baines +22 more
core +1 more source
On the Anomalous Red Giant Branch of the Globular Cluster ω Centauri
The Astrophysical Journal, 2005 Accepted for publication on ApJ. High resolution figures can be downloaded from ftp://ftp.mporzio.astro.it/dist/monelli2/
P. B. Stetson +26 more
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CHEMICAL INHOMOGENEITY IN RED GIANT BRANCH STARS AND RR LYRAE VARIABLES IN NGC 1851: TWO SUBPOPULATIONS IN RED GIANT BRANCH [PDF]
The Astrophysical Journal, 2009 We investigate the red giant branch (RGB) subpopulations of NGC 1851 using Ca uvby photometry. Our color-magnitude diagrams show that the RGB stars have two subpopulations and the RGB stars in NGC 1851 appear to have distinct elemental abundance patterns with the [Ca/H] abundance. We discuss that the elemental abundance patterns can be explained by the
Young Woon Kang +9 more
openaire +3 more sources
EPJ Web of Conferences, 2015 As the Kepler time series grew, so did the interest in the asteroseismology of very low-frequency solar-like oscillators. It is possible to accurately resolve modes for stars near the tip of the red giant branch.
Compton Douglas L. +2 more
doaj +1 more source