Results 131 to 140 of about 21,784 (251)

Dynamical Models of Asymptotic-Giant-Branch Stars [PDF]

, 1974
P. R. Wood
openalex   +1 more source

Ba Enrichment in Gaia MS+WD Binaries: Tracing s-process Element Production

The Astrophysical Journal Letters
A large population of intermediate-separation binaries, consisting of a main-sequence (MS) star and a white dwarf (WD), recently emerged from Gaia’s third data release (DR3), posing challenges to current models of binary evolution. Here we examine the s -
Param Rekhi, Sagi Ben-Ami, Na’ama Hallakoun, Sahar Shahaf, Silvia Toonen, Hans-Walter Rix   +5 more
doaj   +1 more source

Asymptotic giant branch variables as extragalactic distance indicators [PDF]

Proceedings of the International Astronomical Union, 2012
AbstractLarge-amplitude asymptotic giant branch variables potentially rival Cepheid variables as fundamental calibrators of the distance scale, particularly if observations are made in the infrared, or where there is substantial interstellar obscuration.
openaire   +3 more sources

A search for OH maser emission from post-asymptotic giant branch stars [PDF]

, 1996
P. te Lintel Hekkert, Jessica M. Chapman
openalex   +1 more source

Asymptotic Giant Branch variables in the Galaxy and the Local Group [PDF]

Astrophysics and Space Science, 2012
AGB variables, particularly the large amplitude Mira type, are a vital step on the distance scale ladder. They will prove particularly important in the era of space telescopes and extremely large ground-based telescopes with adaptive optics, which will be optimized for infrared observing.
openaire   +3 more sources

Determining the 13C(α, n)16O absolute cross section through the concurrent application of ANC and THM and astrophysical consequences for the s-process in AGB-LMSs.

EPJ Web of Conferences, 2017
The 13C(α, n)16O reaction is considered to be the most important neutron source for the s-process main component in low-mass asymptotic giant branch stars.
Trippella Oscar, La Cognata Marco
doaj   +1 more source

Circumstellar Hibonite and Corundum and Nucleosynthesis in Asymptotic Giant Branch Stars [PDF]

, 1999
Byeon‐Gak Choi, G. J. Wasserburg, G. R. Huss   +2 more
openalex   +1 more source

I-band Asymptotic Giant Branch (IAGB) Stars. II. A First Estimate of Their Precision and a Differential Zero Point

The Astronomical Journal
Hubble Space Telescope observations of 92 galaxies that have a strong showing of I -band asymptotic giant branch (IAGB) stars in their color–magnitude diagrams (CMDs) are used to measure the relative offset between the mean apparent I -band magnitudes of
Wendy L. Freedman, Barry F. Madore, Taylor Hoyt, In Sung Jang, Abigail J. Lee, Kayla A. Owens   +5 more
doaj   +1 more source

Discovery of a Metal-poor Red Giant Star with the Highest Ultralithium Enhancement

The Astrophysical Journal
We present the discovery of 2MASS J05241392−0336543 (hereafter J0524−0336), a very metal-poor ([Fe/H] = −2.43 ± 0.16), highly r -process-enhanced ([Eu/Fe] = +1.34 ± 0.10) Milky Way halo field red giant star, with an ultrahigh Li abundance of A (Li, 3D ...
Jeremy Kowkabany, Rana Ezzeddine, Corinne Charbonnel, Ian U. Roederer, Ella Xi Wang, Yangyang Li, Zoe Hackshaw, Timothy C. Beers, Anna Frebel, Terese T. Hansen, Erika Holmbeck, Vinicius M. Placco, Charli M. Sakari   +12 more
doaj   +1 more source

Envelope loss of RGB/AGB stars and the formation of hot subdwarfs

EPJ Web of Conferences, 2013
Low mass stars may lose their envelopes in the first giant branch (RGB) or the asymptotic giant branch (AGB) via envelope ejection (i.e. superwind). The envelope loss of AGB stars leads to the formation of carbon-oxygen (CO) white dwarfs (WDs), while the
Chen X., Han Z.
doaj   +1 more source