Results 91 to 100 of about 22,085 (227)

HEAVY ELEMENTS IN GLOBULAR CLUSTERS: THE ROLE OF ASYMPTOTIC GIANT BRANCH STARS [PDF]

, 2014
Recent observations of heavy elements in globular clusters reveal intriguing deviations from the standard paradigm of the early galactic nucleosynthesis.
O. Straniero, S. Cristallo, L. Piersanti
semanticscholar   +1 more source

Revisiting Variable Stars Near Globular Clusters South of −29° Declination

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT We review an often‐cited but seldom‐accessed catalogue by Fourcade and Laborde (1966) of 785 variable stars near 47 southern Galactic globular clusters, and recover the locations of 85 stars that were not incorporated into subsequent variable star catalogues and hence have become “lost” to the literature.
Andrew C. Layden, Julia Evangelista, Sakshi Gupta, Mithilesh Mittameda, Eva Mulloy, Sohan I. Muslim, Tiyinoluwa Olushola‐Alao, Akul Rishi   +7 more
wiley   +1 more source

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

White Dwarf Stars in the Big Data Era

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT White dwarf stars are the most common endpoint of stellar evolution. Therefore, these old, numerous and compact objects provide valuable information on the late stages of stellar evolution, the physics of dense plasma and the structure and evolution of our Galaxy.
Maria Camisassa
wiley   +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  

Asymptotic giant branch stars in the Large Magellanic Cloud: evolution of dust in circumstellar envelopes [PDF]

, 2014
We calculated theoretical evolutionary sequences of asymptotic giant branch (AGB) stars, including formation and evolution of dust grains in their circumstellar envelope.
F. Dell’Agli, P. Ventura, R. Schneider, M. Criscienzo, D. A. García-Hernández, C. Rossi, E. Brocato   +6 more
semanticscholar   +1 more source

Large induced subgraphs of random graphs with given degree sequences

Random Structures &Algorithms, Volume 66, Issue 1, January 2025.
Abstract We study a random graph G$$ G $$ with given degree sequence d$$ \boldsymbol{d} $$, with the aim of characterising the degree sequence of the subgraph induced on a given set S$$ S $$ of vertices. For suitable d$$ \boldsymbol{d} $$ and S$$ S $$, we show that the degree sequence of the subgraph induced on S$$ S $$ is essentially concentrated ...
Angus Southwell, Nick Wormald
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

Mira Variables Based on Emission Lines in LAMOST DR9

The Astrophysical Journal
We present a sample of 335 Mira variables, extracted from DR9 of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey. These variables are characterized by the Balmer emissions (H δ , H γ , H β , and H α ) and the metal emissions
Cai-Xia Qu, A-Li Luo, Bing Du, Shu-Guo Ma   +3 more
doaj   +1 more source

Synthesis of Organic and Inorganic Compounds in Asymptotic Giant Branch Stars

Galaxies
After the synthesis of carbon in the core of asymptotic giant branch (AGB) stars, carbon is dredged up to the surface by convection. Many carbon-based molecules are formed in the subsequently developed stellar wind.
Sun Kwok
doaj   +1 more source