Results 21 to 30 of about 4,112,115 (294)
The Astronomical Journal, 2023 Wide-field and deep DECam multiband photometry, combined with HST data for the core of the Galactic globular cluster NGC 2808, allowed us to study the distribution of various stellar subpopulations and stars in different evolutionary phases out to the ...
Christian I. Johnson +9 more
doaj +1 more source
Asteroseismology of red giant stars [PDF]
, 2015 Chapter 11 of the book Extraterrestrial Seismology, 16 pages, 7 ...
Garcia, Rafael A., Stello, Dennis
openaire +2 more sources
The Astrophysical Journal, 2023 We report the discovery of 2M0056–08 as an equal-mass eclipsing binary (EB), comprising two red straggler stars (RSSs) with an orbital period of 33.9 days. Both stars have masses of ≈1.419 M _⊙ , identical to within 0.2%.
Keivan G. Stassun +9 more
doaj +1 more source
Red giant seismology: Observations
EPJ Web of Conferences, 2013 The CoRoT and Kepler missions provide us with thousands of red-giant light curves that allow a very precise asteroseismic study of these objects. Before CoRoT and Kepler, the red-giant oscillation patterns remained obscure.
Mosser B.
doaj +1 more source
Nucleosynthesis in Red Giant Stars [PDF]
Symposium - International Astronomical Union, 2002 The production of elements from helium-3 to fluorine in low- and intermediate-mass stars is reviewed and compared to chemical abundances observed at the surface of both red giant branch and asymptotic giant branch stars. It is highlighted that, while the trends predicted by standard models are generally well confirmed, many chemical abundances observed
openaire +1 more source
Grains in the Atmospheres of Red Giant Stars [PDF]
The Astrophysical Journal, 2001 Model atmospheres for cool giant stars are usually computed with detailed equation of state and opacity calculations that include many molecular species. We show that models of oxygen-rich stars with effective temperatures below 3000 K must also include dust grains.
Jason W. Ferguson +3 more
openaire +1 more source
Oscillations in g-mode period spacings in red giants as a way to determine their state of evolution
EPJ Web of Conferences, 2015 In this work we consider the sensitivity of gravity-mode period spacings to sharp changes in the inner structure of red giant stars, more specifically in the buoyancy frequency inside the g-mode propagation cavity.
Cunha M. S. +3 more
doaj +1 more source
Giant Planet Engulfment by Evolved Giant Stars: Light Curves, Asteroseismology, and Survivability
The Astrophysical Journal, 2023 About ten percent of Sun-like (1–2 M _⊙ ) stars will engulf a 1–10 M _J planet as they expand during the red giant branch (RGB) or asymptotic giant branch (AGB) phase of their evolution.
Christopher E. O’Connor +3 more
doaj +1 more source
Rotation-Induced Mixing in Red Giant Stars [PDF]
, 2006 2 pages, 2 figures, to appear in the proceedings of the ESO-Arcetri Workshop on "Chemical abundances and mixing in stars in the Milky Way and its satellites" held in Castiglione della Pescaia, Italy, September 2004 (Springer-Verlag Series "ESO Astrophysics Symposia")
Palacios, Ana +3 more
openaire +3 more sources
CHEMICAL COMPOSITION OF ATMOSPHERES OF COOL GIANT STARS
Odessa Astronomical Publications, 2017 Results of determination of abundances of chemical elements in the atmospheres of 57 giant stars of the oxygen sequence of the Galactic disk axe given.
N. S. Komarov
doaj +1 more source