Results 151 to 160 of about 995 (179)

Abundant supernova dust and heterogeneous aqueous alteration revealed by stardust in two lithologies of asteroid Bennu. [PDF]

Nat Astron
Nguyen AN, Seifert LB, Shimizu K, Thomas-Keprta K, Le L, Keller LP, Clemett SJ, Rahman Z, Barnes JJ, Connolly HC, Lauretta DS.   +10 more
europepmc   +1 more source

Epidemiology, antimicrobial resistance, and mortality of bloodstream infections in hemodialysis patients: an 11-year retrospective cohort study from southern Saudi Arabia. [PDF]

BMC Nephrol
Alshahrani MM, Bilali RMA, Mohammed SA, Tawhari I, Alshehri M, Asiri AJ, Alahmari H, Ghamdi BA, Tahtouh E, Alwadai N, Elnaby NMA, Somily A, Binkhamis K, Taresh HMN, Alqahtani SSM, Farhan AAAA, Asiri HYM, Alamoud AAA, Alqahtani YMS, Alzailaie WKA, Alshafea YSY, Alqahtani AJ, Shabi Y.   +22 more
europepmc   +1 more source

Rubidium-Rich Asymptotic Giant Branch Stars [PDF]

Science, 2006
A long-debated issue concerning the nucleosynthesis of neutron-rich elements in asymptotic giant branch (AGB) stars is the identification of the neutron source. We report intermediate-mass (4 to 8 solar masses) AGB stars in our Galaxy that are rubidium-rich as a result of overproduction of the long-lived radioactive isotope 87
Josep Maria Trigo Rodríguez, Bertrand Plez, Domingo Aníbal García Hernández   +2 more
exaly   +4 more sources

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Evolution on the Asymptotic Giant Branch

Astronomy and Astrophysics Library, 2012
Stars of low and intermediate mass experience recurrent thermal instabilities during the phase of double (hydrogen and helium) shell burning. During this phase they populate the Asymptotic Giant Branch. The thermal instabilities give rise to drastic, but short-lived structure variations, mixing episodes and specific phases of nucleosynthesis.
Rudolf Kippenhahn, Alfred Weigert
exaly   +2 more sources

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.
Falk Herwig
exaly   +2 more sources

Asymptotic-Giant-Branch Stars [PDF]

Nature, 1992
exaly   +2 more sources

Asymptotic Giant Branch Evolution and Beyond

Annual Review of Astronomy and Astrophysics, 1983
Alvio Renzini, Icko Iben
exaly   +2 more sources

Asymptotic Giant Branch and Super-Asymptotic Giant Branch Stars: Modelling Dust Production at Solar Metallicity [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
We present dust yields for asymptotic giant branch (AGB) and super--asymptotic giant branch (SAGB) stars of solar metallicity. Stars with initial mass $1.5~M_{\odot} \leq M_{\rm ini} \leq 3~M_{\odot}$ reach the carbon star stage during the AGB phase and produce mainly solid carbon and SiC.
Raffaella Schneider, Fabio La Franca, Domingo Aníbal García Hernández   +2 more
exaly   +4 more sources

Beyond the asymptotic giant branch

2008
The evolution of the IR spectra of asymptotic giant branch (AGB) stars has been obtained by time-dependent radiative transfer models. These models are compared with IRAS photometric and spectroscopic observations. Extrapolation of the models to beyond the AGB lead to predictions of the spectra of proto-planetary nebulae.
Sun Kwok, Kevin Volk
openaire   +1 more source

Nucleosynthesis in asymptotic giant branch stars

AIP Conference Proceedings, 2014
The nucleosynthesis in asymptotic giant branch stars (briefly: AGB)is a challenging and fascinating subject in the theory of stellar evolution and important for observations as well. This is because about of half the heavy elements beyond iron are synthesized during thermal pulsation phases of these stars.
openaire   +1 more source