Results 131 to 140 of about 26,787 (255)

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

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

ON THE RELATION BETWEEN THE MYSTERIOUS 21 μm EMISSION FEATURE OF POST-ASYMPTOTIC GIANT BRANCH STARS AND THEIR MASS-LOSS RATES [PDF]

, 2016
Ajay Mishra, Aigen Li, B. W. Jiang
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

Radiation-Pressure Ejection of Planetary Nebulae in Asymptotic-Giant-Branch Stars [PDF]

, 1999
A. V. Sweigart
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The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. VII. Long-period Variable Stars in the Nearest Starburst Dwarf Galaxy, IC 10

The Astronomical Journal
To identify long-period variable (LPV) stars in IC 10—the nearest starburst galaxy of the Local Group—we conducted an optical monitoring survey using the 2.5 m Isaac Newton Telescope with the wide-field camera (WFC) in the i band and V band from 2015 to ...
Mahtab Gholami, Atefeh Javadi, Hamidreza Mahani, Jacco Th. van Loon, Habib Khosroshahi, Elham Saremi, Iain McDonald, Samaneh Eftekhari, Yi Ren, Hamed Altafi   +9 more
doaj   +1 more source

Atomic hydrogen in asymptotic giant branch circumstellar environments. A case study: X Her [PDF]

, 2005
E. Gardan, E. Gérard, T. Le Bertre
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Mixing and Magnetic Fields in Asymptotic Giant Branch Stars in the Framework of FRUITY Models [PDF]

, 2021
D. Vescovi
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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

High-resolution spectroscopic observations of post-asymptotic giant branch candidates from the Edinburgh-Cape Survey [PDF]

, 2005
B. B. Lynn, F. P. Keenan, P. L. Dufton, W. R. J. Rolleston, J. V. Smoker, R. S. I. Ryans, D. Kilkenny, D. O’Donoghue, N. C. Hambly, H. T. McGillivray   +9 more
openalex   +1 more source