Lithium in Stars With Exoplanets [PDF]
Astronomy and Astrophysics, 2004 13 pages, 10 figures, Astronomy & Astrophysics ...
Rafael Rebolo López +2 more
exaly +4 more sources
Subgiants in NGC 188 reveal that rotationally induced mixing creates the main sequence Li-Dip [PDF]
Nature CommunicationsThe Lithium-Dip is a severe lithium depletion observed in mid-F (6200-6650 K) dwarfs, which has puzzled astronomers since it was discovered in 1986. Proposed mechanisms include effects related to rotation, magnetic fields, diffusion, gravity waves, and ...
Qinghui Sun +6 more
doaj +2 more sources
Lithium evolution in the low-mass evolved stars with asteroseismology and LAMOST spectroscopy
Fundamental ResearchLithium is an ancient element that was first produced by the Big Bang Nucleosynthesis (BBN) a few minutes after the birth of the Universe. Lithium is a sensitive tracer for a number of processes in a variety of astrophysical environments due to its multi-
Hong-Liang Yan +9 more
doaj +3 more sources
Using a neural network approach and starspots dependent models to predict effective temperatures and ages of young stars. [PDF]
PLoS ONEThis study presents a statistical approach to accurately predict the effective temperatures of pre-main sequence stars, which are necessary for determining stellar ages using the isochrone methodology and cutting-age starspots-dependent models.
Marco Tarantino +4 more
doaj +2 more sources
Production of Lithium and Heavy Elements in AGB Stars Experiencing PIEs
GalaxiesAsymptotic giant branch (AGB) stars can experience proton ingestion events (PIEs), leading to a rich nucleosynthesis. During a PIE, the intermediate neutron capture process (i-process) develops, leading to the production of trans-iron elements.
Arthur Choplin +3 more
doaj +3 more sources
Enhancement of Lithium in Red Clump Stars by Neutrino Magnetic Moments [PDF]
EPJ Web of Conferences, 2022 A recent spectroscopic survey has shown that the lithium abundances in low-mass red-clump stars are higher than theoretical prediction. Motivated by their finding, we implemented effects of additional energy losses induced by neutrino magnetic moments on
Mori Kanji +4 more
doaj +1 more source
Lithium in Kepler Red Giants: Defining Normal and Anomalous
The Astronomical Journal, 2023 The orders-of-magnitude variations in the lithium abundances of evolved stars have long been a puzzle. Diluted signals, ambiguous evolutionary states, and unknown masses have made it challenging to both map the expected lithium signals and explain the ...
Jamie Tayar +3 more
doaj +1 more source
The lithium content of the galactic halo stars [PDF]
EAS Publications Series, 2005 34 pages. Accepted for publication in A&A.
Charbonnel, C., Primas, F.
openaire +3 more sources
Lithium in Turnoff Stars in the Globular Cluster M5: A Quest for Primordial Lithium
The Astrophysical Journal, 2023 The light element lithium is formed by nucleosynthesis during the Big Bang. Its abundance can help to define the parameters of the early Universe. To find this primordial value, it is necessary to determine Li abundances in the oldest stars because it is
Ann Merchant Boesgaard +1 more
doaj +1 more source
Chemical Compositions Of Red Giant Stars in the Old Open Cluster NGC 7789
The Astronomical Journal, 2023 We have gathered optical-region spectra, derived model atmosphere parameters, and computed elemental abundances for 15 red giant stars in the open cluster NGC 7789.
Neel Nagarajan +3 more
doaj +1 more source