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Effects of rotation and magnetic fields on the lithium abundance and asteroseismic properties of exoplanet-host stars
magnetic fields the lithium abundance asteroseismic properties
2011/1/11
Aims: The effects of rotation and magnetic fields on the surface abundances of solar-type stars are studied in order to investigate whether the reported difference in lithium content of exoplanet-host...
Identification of the Lithium Depletion Boundary and Age of the Southern Open Cluster Blanco 1
Identification the Lithium Depletion Boundary
2011/1/13
We present results from a spectroscopic study of the very low mass members of the Southern open cluster Blanco 1 using the Gemini-N telescope. We obtained intermediate resolution (R~4400) GMOS spectra...
Solar twins in M67 : Evolutionary status and lithium abundance
Stars fundamental parameters – Stars abundances – Stars evolution – Stars interiors – Stars solar-type
2010/11/11
Aims. We determine the age and mass of the three best solar twin candidates in open cluster M67 through lithium evolutionary models.Methods. We computed a grid of evolutionary models with non-standard...
Resonant Destruction as a Possible Solution to the Cosmological Lithium Problem
Resonant Destruction Cosmological Lithium Problem
2010/11/10
We explore a nuclear physics resolution to the discrepancy between the predicted standard
BBN abundance of 7Li and its observational determination in metal-poor stars. The the-
oretical 7Li abundanc...
The Super Lithium-Rich Red Giant Rapid Rotator G0928+73.2600: A Case for Planet Accretion?
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/5
We present the discovery of a super lithium-rich K giant star, G0928+73.2600. This red giant (T_eff = 4885 K and log g = 2.65) is a fast rotator with a projected rotational velocity of 8.4 km/s and an...
WASP-32b: A transiting hot Jupiter planet orbiting a lithium-poor, solar-type star
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/28
We report the discovery of a transiting planet orbiting the star TYC 2-1155-1. The star, WASP-32, is a moderately bright (V=11.3) solar-type star (Teff=6100 +- 100K, [Fe/H] = -0.13 +- 0.10).
Lithium and proton-capture elements in Globular Cluster dwarfs: the case of 47 Tuc
Stars abundances Stars Individual Population II- (Galaxy:) globular clusters
2010/3/9
Previous surveys in a few metal-poor Globular Clusters (GCs) showed that the determination of abundances for Li and proton-capture elements offers a key tool to address the intra-cluster pollution sce...
βCoronae borealis：lithium and cerium contribution to the blend at 6708 A
βCoronae borealis lithium 6708 A cerium
2009/6/25
βCoronae borealis：lithium and cerium contribution to the blend at 6708 A。