Results 31 to 40 of about 10,825 (251)

Extreme helium stars: non-LTE matters Helium and hydrogen spectra of the unique objects V652 Her and HD 144941 [PDF]

, 2005
Received; accepted Abstract. Quantitative analyses of low-mass hydrogen-deficient (super-)giant stars - so-called extreme helium stars - to date face two major di culties.
N. Przybilla, K. Butler, U. Heber, C. S. Jeffery   +3 more
semanticscholar   +1 more source

Ruthenium and hafnium abundances in giant and dwarf barium stars

, 2007
We present abundances for Ru and Hf, compare them to abundances of other heavy elements, and discuss the problems found in determining Ru and Hf abundances with laboratory gf-values in the spectra of barium stars.
Allen, Allen, Arlandini, Barbuy, Boyarchuk, Böhm-Vitense, Böhm-Vitense, Cayrel, D. M. Allen, Edvardsson, G. F. Porto de Mello, Gallino, Grevesse, Gustafsson, Hill, Honda, Jorissen, Kaufer, Lawler, Luck, Lundqvist, Masseron, Meléndez, North, Piskunov, Plez, Smiljanic, Smith, Sneden, Spite, Tomkin, Yushchenko   +31 more
core   +1 more source

s-Process Enriched Evolved Binaries in the Galaxy and the Magellanic Clouds [PDF]

Publications Astronomical Society of Australia
Post-asymptotic giant branch stars (post-AGB) in binary systems, with typical orbital periods between $\sim\!100$ to $\sim$ 1 000 days, result from a poorly understood interaction that terminates their precursory AGB phase.
Meghna Menon, Devika Kamath, Maksym Mohorian, H. Van Winckel, Paolo Ventura   +4 more
semanticscholar   +1 more source

The chemical evolution of globular clusters - I. Reactive elements and non-metals [PDF]

, 2009
We propose a new chemical evolution model aimed at explaining the chemical properties of globular clusters (GC) stars. Our model depends upon the existence of (i) a peculiar pre-enrichment phase in the GC’s parent galaxy associated with very ...
A. Marcolini, B. Gibson, A. Karakas, P. Sánchez-Blázquez   +3 more
semanticscholar   +1 more source

Theoretical isochrones for the Delta a photometric system

, 2003
We have calculated theoretical isochrones for the photometric Delta a system to derive astrophysical parameters such as the age, reddening and distance modulus for open clusters.
A. Claret, Babcock, Babcock, Babcock, Bayer, Canuto, Castelli, Claret, Claret, E. Paunzen, Grenier, H. M. Maitzen, Hubrig, Kupka, Maitzen, Maitzen, Maitzen, Oetken, Paunzen, Paunzen, Paunzen, Pöhnl, Vogt   +22 more
core   +1 more source

CNO and F abundances in the barium star HD 123396 [PDF]

, 2011
Context. Barium stars are moderately rare, chemically peculiar objects, which are believed to be the result of the pollution of an otherwise normal star by material from an evolved companion on the asymptotic giant branch (AGB). Aims.
A. Alves-Brito, A. Karakas, D. Yong, J. Mel'endez, S. V'asquez   +4 more
semanticscholar   +1 more source

Mining the GALAH Data. I. Study of Five Super Lithium-rich Metal-poor Giants

The Astrophysical Journal
The presence of a large amount of Li in giants is still a mystery. Most of the super Li-rich (SLR) giants reported in recent studies are in the solar metallicity regime.
Antony Susmitha, Anohita Mallick, Bacham E. Reddy   +2 more
doaj   +1 more source

Chemical evolution of star clusters

, 2009
I discuss the chemical evolution of star clusters, with emphasis on old globular clusters, in relation to their formation histories. Globular clusters clearly formed in a complex fashion, under markedly different conditions from any younger clusters ...
Abia C., Charbonnel C., Dubath P., Mackey A. D., Romano D., van Loon J. Th., Yi S. K.   +6 more
core   +1 more source

Glycosylated LGALS3BP is highly secreted by bladder cancer cells and represents a novel urinary disease biomarker

Molecular Oncology, EarlyView.
Urinary LGALS3BP is elevated in bladder cancer patients compared to healthy controls as detected by the 1959 antibody–based ELISA. The antibody shows enhanced reactivity to the high‐mannose glycosylated variant secreted by cancer cells treated with kifunensine (KIF).
Asia Pece, Giulio Lovato, Ilaria Cela, Arianna Mercatelli, Benedetta Ferro, Jussi Nikkola, Sara Pagotto, Tommaso Grottola, Vincenzo De Laurenzi, Rossella Cicchetti, Antonio Marchetti, Luigi Schips, Rossano Lattanzio, Stefano Iacobelli, Emily Capone, Peter Black, Mads Daugaard, Michele Marchioni, Gianluca Sala   +18 more
wiley   +1 more source

Cytoplasmic p21 promotes stemness of colon cancer cells via activation of the NFκB pathway

Molecular Oncology, EarlyView.
Cytoplasmic p21 promotes colorectal cancer stem cell (CSC) features by destabilizing the NFκB–IκB complex, activating NFκB signaling, and upregulating BCL‐xL and COX2. In contrast to nuclear p21, cytoplasmic p21 enhances spheroid formation and stemness transcription factor CD133.
Arnatchai Maiuthed, Kerstin Huebner, Katharina Erlenbach‐Wuensch, Chuanpit Hampel, Daniela Thalheim, Adriana Vial‐Roehe, Bodee Nutho, Susanne Merkel, Arndt Hartmann, Pithi Chanvorachote, Regine Schneider‐Stock   +10 more
wiley   +1 more source