Results 71 to 80 of about 995 (179)

FLUORINE ABUNDANCES IN GALACTIC ASYMPTOTIC GIANT BRANCH STARS

The Astrophysical Journal, 2010
An analysis of the fluorine abundance in Galactic asymptotic giant branch (AGB) carbon stars (24 N-type, 5 SC-type, and 5 J-type) is presented. This study uses the state-of-the-art carbon-rich atmosphere models and improved atomic and molecular line lists in the 2.3 μm region.
Abia C., Cunha K., Cristallo S., de Laverny P., Domínguez I., Eriksson K., Gialanella L., Hinkle K., IMBRIANI, GIANLUCA, Recio Blanco A., Smith V. V., Stranier, O., Wahlin R.   +12 more
openaire   +3 more sources

Measuring Star Formation Histories from Asymptotic Giant Branch Stars. I. A Demonstration in M31

The Astrophysical Journal
We demonstrate how near-infrared (NIR) imaging of resolved luminous asymptotic giant branch (AGB) stars can be used to measure well-constrained star formation histories (SFHs) across cosmic time.
Abigail J. Lee, Daniel R. Weisz, Yi Ren, Alessandro Savino, Andrew E. Dolphin   +4 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   +2 more sources

Pulsations of intermediate–mass stars on the asymptotic giant branch [PDF]

Astronomy Letters, 2017
26 pages, 10 figures, 2 tables, accepted to Astronomy ...
openaire   +2 more sources

A Catalog of 486 Barium Stars Identified in GALAH DR4

The Astrophysical Journal Supplement Series
We present a catalog of 486 Ba stars identified in the GALAH DR4 survey using high-resolution spectra and precise abundance measurements. The sample was selected based on s- process enrichment criteria involving the abundances of Ba and La relative to Eu,
Guochao Yang, Jingkun Zhao, Nian Liu, Xiaokun Hou, Zhenxin Lei, Xianhao Ye, Gang Zhao   +6 more
doaj   +1 more source

A Solar‐like Cycle in Asymptotic Giant Branch Stars [PDF]

The Astrophysical Journal, 2000
I propose that the mechanism behind the formation of concentric semi-periodic shells found in several planetary nebulae (PNs) and proto-PNs, and around one asymptotic giant branch (AGB) star, is a solar-like magnetic activity cycle in the progenitor AGB stars.
openaire   +2 more sources

Study of Neutron Capture Nucleosynthesis Based on Post–Asymptotic Giant Branch Stars

The Astrophysical Journal
The intermediate neutron-capture process ( i -process) may occur during proton ingestion events, with post–asymptotic giant branch (AGB) stars considered among its potential astrophysical sites.
Miao Tian, Wenyuan Cui, Jian-Rong Shi, Jin-Xiao Qin, Hongjie Li, Fang Wen, Zhenyan Huo   +6 more
doaj   +1 more source

88th Annual Meeting of the Meteoritical Society 2026: Abstracts

Meteoritics &Planetary Science, Volume 61, Issue S1, Page S48-S551, August 2026.
wiley   +1 more source

Asymptotic Giant Branch Mass-loss Rates and Metal Yields from Scaled Mixing-length and Mass-loss Parameters

The Astrophysical Journal
Stars on the asymptotic giant branch (AGB) enrich the interstellar medium with carbon, nitrogen, and dust, which in turn boost cooling and promote future generations of planet and star formation.
Ezra Huscher, Kristian Finlator, Jason Jackiewicz   +2 more
doaj   +1 more source

Model Dust Envelopes for Asymptotic Giant Branch Stars. I. OH/IR Stars [PDF]

Journal of Astronomy and Space Sciences, 1995
OH/IR stars are the most massive and youngest subclass in asymptotic giant branch stars which pass through sporadic superwind phases. We have modeled the dust envelopes around OH/IR stars with close attention to the evolution of the structure of the dust
Kyung-Won Suh
doaj