Results 61 to 70 of about 29,820 (298)

Rubidium and zirconium abundances in massive Galactic asymptotic giant branch stars revisited [PDF]

, 2017
Luminous Galactic OH/IR stars have been identified as massive (>4-5 M_s) AGB stars experiencing HBB and Li production. Their Rb abundances and [Rb/Zr] ratios derived from hydrostatic model atmospheres, are significantly higher than predictions from AGB ...
V. Pérez-Mesa, V. Pérez-Mesa, O. Zamora, O. Zamora, D. A. García-Hernández, D. A. García-Hernández, B. Plez, A. Manchado, A. Manchado, Amanda I. Karakas, M. Lugaro   +10 more
semanticscholar   +1 more source

Pulsating stars in the VMC survey

EPJ Web of Conferences, 2017
The VISTA survey of the Magellanic Clouds system (VMC) began observations in 2009 and since then, it has collected multi-epoch data at Ks and in addition multi-band data in Y and J for a wide range of stellar populations across the Magellanic system ...
Cioni Maria-Rosa L., Ripepi Vincenzo, Clementini Gisella, Groenewegen Martin A.T., Moretti Maria I., Muraveva Tatiana, Subramanian Smitha   +6 more
doaj   +1 more source

Pulsating post-asymptotic giant branch stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1993
Numerical stability analyses of envelopes of post-asymptotic giant branch stars show instabilities towards radial pulsations over a broad range of effective temperatures, although only stars with sufficiently high luminosity-to-mass ratios and high enough iron abundances are excited.
openaire   +1 more source

The Large Magellanic Cloud as a laboratory for hot bottom burning in massive asymptotic giant branch stars [PDF]

, 2015
We use Spitzer observations of the rich population of Asymptotic Giant Branch stars in the Large Magellanic Cloud (LMC) to test models describing the internal structure and nucleosynthesis of the most massive of these stars, i.e.
P. Ventura, A. Karakas, F. Dell’Agli, M. Boyer, D. A. Garc'ia-Hern'andez, M. Criscienzo, R. Schneider   +6 more
semanticscholar   +1 more source

A proposed direct measurement of cross section at Gamow window for key reaction 19F(p,α) 16O in Asymptotic Giant Branch stars with a planned accelerator in CJPL [PDF]

, 2016
In 2014, the National Natural Science Foundation of China (NSFC) approved the Jinping Underground Nuclear Astrophysics laboratory (JUNA) project, which aims at direct cross-section measurements of four key stellar nuclear reactions right down to the ...
Jianjun He, Shi-wei Xu, Shaobo Ma, Jun Hu, Li-yong Zhang, C. Fu, N. Zhang, G. Lian, Jun Su, Yunju Li, Shengquan Yan, Yangping Shen, S. Hou, B. Jia, Tao Zhang, Xiaopeng Zhang, B. Guo, S. Kubono, Weiping Liu   +18 more
semanticscholar   +1 more source

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
core   +1 more source

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

ASYMPTOTIC GIANT BRANCH VARIABLES

Odessa Astronomical Publications, 2017
Asymptotic Giant Branch variable are the brightest and most distinctive individual stars to be found in the resolved, old and inter mediate age, stellar populations of galaxies in the Local Group and beyond.
P. A. Whitelock
doaj   +1 more source

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
core   +2 more sources

Asymptotic Giant Branch Stars [PDF]

, 2004
Preface Chapter 1: Introduction: H.J. Habing and H. Olofsson N.B.: This chapter is not yet completed! 1.1 Bits of history 1.2 The structure of AGB stars 1.3 Observational characteristics of AGB stars 1.4 Distinctive properties of AGB stars Chapter 2: Evolution, Nucleosynthesis and Pulsation: P. Wood and J. Lattanzio 2.1 Basic observational properties 2.
openaire   +1 more source