Results 41 to 50 of about 26,787 (255)

Variations in the Na-O anticorrelation in globular clusters: Evidence for a deep mixing episode in red giant branch stars

, 2010
The Na-O anticorrelation seen in almost all globular clusters ever studied using high-resolution spectroscopy is now generally explained by the primordial pollution from the first generation of the intermediate-mass asymptotic giant branch stars to the ...
Baines, Carretta, Carretta, Carretta, Carretta, Cho, Cohen, D'Antona, Decressin, Gratton, Gratton, Ivans, Jae-Woo Lee, Kraft, Kraft, Langer, Lee, Lee, Lee, Sneden, Ventura, Ventura, Ventura   +22 more
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On the Termination of Asymptotic Giant Branch Evolution [PDF]

Symposium - International Astronomical Union, 1984
The evolution of planetary nebula (PN) nuclei has been studied at masses of 0.60, 0.70 and 0.76 M⊙, and for the ejection of the PN at various phases of a helium shell flash cycle. The evolution at high luminosities takes longer for nuclei resulting from PN ejection at shell flash peak than it does for those resulting from ejection in the inter-flash ...
P. R. Wood, D. J. Faulkner
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On Carbon Burning in Super Asymptotic Giant Branch Stars [PDF]

, 2015
We explore the detailed and broad properties of carbon burning in Super Asymptotic Giant Branch (SAGB) stars with 2755 MESA stellar evolution models.
Farmer, R., Fields, C. E., Timmes, F. X.
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Evolution of the dust mass loss with luminosity along the giant branch of the globular cluster 47 Tuc [PDF]

, 2001
The paper investigates the properties of the dust mass loss in stars populating the giant branch of the globular cluster 47 Tuc, by combining ISOCAM and DENIS data. Raster maps of 5 fields covering areas ranging from 4 x 4 to 15 x 15 arcmin2 at different
A. Jorissen, A. Ramdani, Abergel, Arndt, Aussel, Bedijn, Bessell, Blöcker, Bowen, Cesarsky, Chun, Cioni, Claussen, de Jong, Delfosse, Draine, Fleischer, Fouqué, Fox, Frogel, Frogel, Frogel, Frogel, Fusi-Pecci, Gillett, Girardi, Glass, Gratton, Groenewegen, Habing, Hesser, Höfner, Jorissen, Jura, Justtanont, Kessler, Le Bertre, Le Bertre, Le Sidaner, Lee, Lloyd Evans, Meixner, Mengel, Netzer, Nishida, Schröder, Searle, Skrutskie, Starck, Tanabé, Tucholke, van der Veen, van Loon, van Loon, Vassiliadis, Verbunt, Weidemann, Whitelock, Whitelock, Winters, Zijlstra   +60 more
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Thermally Pulsing Asymptotic Giant Branch Star Models and Globular Cluster Planetary Nebulae I: The Model

, 2011
Thermally pulsing asymptotic giant branch models of globular cluster stars are calculated using a synthetic model with the goal of reproducing the chemical composition, core masses and other observational parameters of the four known globular cluster ...
Alexander, Alves, Asplund, Bedin, Bertelli, Bertelli, Bianchi, Bianchi, Bica, Buell, Calamida, Caloi, Carretta, Cool, Da Costa, Davies, Gavilan, Gillett, Gratton, Gratton, Groenewegen, Groenewegen, Hansen, Hansen, Hansen, Harrington, Harris, Howard, Iglesias, Jacoby, James F. Buell, Lee, Marigo, Marino, Milone, Minniti, Ortalani, Otsuka, Peña, Piotto, Piotto, Rauch, Rauch, Reimers, Renzini, Renzini, Renzini, Richer, Schröder, Strickler, Vassiliadis, Vassiliadis, Vesperini, Wagenhuber, Yanny, Zinn, Zoccali   +56 more
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The Kr85 s-process Branching and the Mass of Carbon Stars

, 2001
We present new spectroscopic observations for a sample of C(N)-type red giants. These objects belong to the class of Asymptotic Giant Branch stars, experiencing thermal instabilities in the He-burning shell (thermal pulses).
Abia C., Abia C., Anders E., Blocker T., Charbonnel C., de Laverny P., de Laverny P., Denissenkov P. A., Eriksson K., Fouque P., Frost C. A., Fuhr J. R., Gratton R., Herwig F., Herwig F., Jorissen A., Kipper T., Komarovskij V. A., Langer N., Lattanzio J. C., Malaney R. A., Marengo M., Martin G. A., Mowlavi N., Noguchi K., Ohnaka K., Ohnaka K., Piskunov N. E., Schoier F. L., Smith V. V., Takeda Y., Thevenin F., Thevenin F., Trams N. R., Utsumi K., van Loon J. Th., van Loon J. Th., Weiss A., Wiese W. L.   +38 more
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CYANOGEN IN NGC 1851 RED GIANT BRANCH AND ASYMPTOTIC GIANT BRANCH STARS: QUADRIMODAL DISTRIBUTIONS [PDF]

The Astrophysical Journal, 2012
The Galactic globular cluster NGC 1851 has raised much interest since Hubble Space Telescope photometry revealed that it hosts a double subgiant branch. Here we report on our homogeneous study into the cyanogen (CN) band strengths in the red giant branch (RGB) population (17 stars) and asymptotic giant branch (AGB) population (21 stars) using AAOmega ...
Campbell, S, Yong, David, Wylie de Boer, Elizabeth, Stancliffe, R J, Lattanzio, John, Angelou, G C, D'Orazi, V D, Martell, S L, Grundahl, Frank, Sneden, Chris   +9 more
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Impact of AGB Stars on the Chemical Evolution of Neutron-Capture Elements

Universe, 2022
In this review, we discuss the impact of s-process nucleosynthesis in asymptotic giant branch stars on the enrichment of heavy elements. We review the main steps made on this subject in the last 40 years and discuss the importance of modelling the ...
Gabriele Cescutti, Francesca Matteucci
doaj   +1 more source

Stellar Models and Yields of Asymptotic Giant Branch Stars [PDF]

, 2007
We present stellar yields calculated from detailed models of low and intermediate-mass asymptotic giant branch (AGB) stars. We evolve models with a range of mass from 1 to 6Msun, and initial metallicities from solar to 1/200th of the solar metallicity ...
Amanda Karakas, Asplund, Blöcker, Blöcker, Charbonnel, Charbonnel, Forestini, Frost, Garcia-Hernandez, Goriely, Groenewegen, Guandalini, Izzard, Izzard, John C. Lattanzio, Jorissen, Lattanzio, Lugaro, Marigo, Marigo, Mowlavi, Palacios, Renzini, Siess, Stancliffe, Thielemann, van den Hoek, Ventura, Ventura, Ventura, Wagenhuber, Yong   +31 more
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Evolution of Asymptotic Giant Branch Stars [PDF]

Annual Review of Astronomy and Astrophysics, 2005
▪ Abstract  The current status of modeling the evolution and nucleosynthesis of asymptotic giant branch (AGB) stars is reviewed. The principles of AGB evolution have been investigated in recent years leading to improved and refined models, for example with regard to hot-bottom burning or the third dredge-up.
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