scholarly journals Addressing the acoustic tachocline anomaly and the lithium depletion problem at the same time

2018 ◽  
Vol 481 (4) ◽  
pp. 4389-4396 ◽  
Author(s):  
Andreas Christ Sølvsten Jørgensen ◽  
Achim Weiss
Keyword(s):  
Lithium Depletion

Lithium depletion during heat treatment of aluminum-lithium alloys

1986 ◽  
Vol 17 (4) ◽  
pp. 635-643 ◽  
Author(s):  
J. M. Papazian ◽  
R. L. Schulte ◽  
P. N. Adler
Keyword(s):  
Heat Treatment ◽  
Aluminum Lithium ◽  
Lithium Depletion ◽  
Aluminum Lithium Alloys ◽  
Lithium Alloys

scholarly journals WIYN Open Cluster Study. LXXV. Testing the Metallicity Dependence of Stellar Lithium Depletion Using Hyades-aged Clusters. I. Hyades and Praesepe

2017 ◽  
Vol 153 (3) ◽  
pp. 128 ◽  
Author(s):  
Jeffrey D. Cummings ◽  
Constantine P. Deliyannis ◽  
Ryan M. Maderak ◽  
Aaron Steinhauer
Keyword(s):  
Open Cluster ◽  
Lithium Depletion

scholarly journals Observational constraints for lithium depletion before the RGB

2003 ◽  
Vol 410 (3) ◽  
pp. 937-942 ◽  
Author(s):  
P. de Laverny ◽  
J. D. do Nascimento ◽  
A. Lèbre ◽  
J. R. De Medeiros
Keyword(s):  
Observational Constraints ◽  
Lithium Depletion

scholarly journals The rotation-lithium depletion correlation in theβPictoris association and the LDB age determination

2016 ◽  
Vol 596 ◽  
pp. A29 ◽  
Author(s):  
S. Messina ◽  
A. C. Lanzafame ◽  
G. A. Feiden ◽  
M. Millward ◽  
S. Desidera ◽  
...  
Keyword(s):  
Age Determination ◽  
Lithium Depletion

scholarly journals Rotation, Activity and Lithium Depletion in the Hyades Late Main Sequence

1988 ◽  
Vol 132 ◽  
pp. 469-472
Author(s):  
R. Rebolo ◽  
J. E. Beckman
Keyword(s):  
Surface Temperature ◽  
Surface Activity ◽  
Main Sequence ◽  
Rossby Number ◽  
Homogeneous Set ◽  
Effects Of Temperature ◽  
Lithium Depletion

Selecting stars with previously measured or estimated rotational periods we measured Li equivalent widths in 8 stars of the Hyades late main sequence. Combining our data with literature values, we derive a homogeneous set of Li abundances. Plotting log N(Li) against Rossby number we can separate the effects of temperature and rotation. We find for stars later than F8 increased depletion with longer period, at constant surface temperature. Discounting, as improbable, spurious abundances due to surface activity effects, we give a tentative view of the implications of these results for stellar modelling.

scholarly journals Lithium Depletion in a [Fe/H]= —3.4 star?

2000 ◽  
Vol 198 ◽  
pp. 356-357 ◽  
Author(s):  
M. Spite ◽  
F. Spite ◽  
R. Cayrel ◽  
V. Hill ◽  
E. Depagne ◽  
...  
Keyword(s):  
High Quality ◽  
Lithium Abundance ◽  
Lithium Depletion ◽  
Metal Poor Star

We present a determination of the lithium abundance from high quality spectra in an extremely metal poor star where the lithium line had not been detected.

scholarly journals The effects of rotation on the lithium depletion of G- and K-dwarfs in Messier 35

2020 ◽  
Vol 500 (1) ◽  
pp. 1158-1177
Author(s):  
R D Jeffries ◽  
R J Jackson ◽  
Qinghui Sun ◽  
Constantine P Deliyannis
Keyword(s):  
Rotation Rate ◽  
Binary Systems ◽  
Main Sequence ◽  
Strong Relationship ◽  
Magnetic Activity ◽  
Rich Cluster ◽  
Stellar Radius ◽  
Rotation Periods ◽  
Probability Zero ◽  
Lithium Depletion

ABSTRACT New fibre spectroscopy and radial velocities from the WIYN telescope are used to measure photospheric lithium in 242 high-probability, zero-age main-sequence F- to K-type members of the rich cluster M35. Combining these with published rotation periods, the connection between lithium depletion and rotation is studied in unprecedented detail. At Teff < 5500 K there is a strong relationship between faster rotation and less Li depletion, although with a dispersion larger than measurement uncertainties. Components of photometrically identified binary systems follow the same relationship. A correlation is also established between faster rotation rate (or smaller Rossby number), decreased Li depletion and larger stellar radius at a given Teff. These results support models where star-spots and interior magnetic fields lead to inflated radii and reduced Li depletion during the pre-main-sequence (PMS) phase for the fastest rotators. However, the data are also consistent with the idea that all stars suffered lower levels of Li depletion than predicted by standard PMS models, perhaps because of deficiencies in those models or because saturated levels of magnetic activity suppress Li depletion equally in PMS stars of similar Teff regardless of rotation rate, and that slower rotators subsequently experience more mixing and post-PMS Li depletion.

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