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J/A+A/613/A63       Lithium content for 148 Pleiades stars     (Bouvier+, 2018)

The lithium-rotation connection in the 125 Myr-old Pleiades cluster. Bouvier J, Barrado D., Moraux E., Stauffer J., Rebull L., Hillenbrand L., Bayo A., Boisse I., Bouy H., DiFolco E., Lillo-Box J., Morales Calderon M. <Astron. Astrophys. 613, A63 (2018)> =2018A&A...613A..63B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, K-type ; Abundances Keywords: stars: abundances - stars: low-mass - stars: rotation - open clusters and associations: individual: Melotte 22 (Pleiades) - stars: solar-type Abstract: The evolution of lithium abundance over a star's lifetime is indicative of transport processes operating in the stellar interior. Aims. We revisit the relationship between lithium content and rotation rate previously reported for cool dwarfs in the Pleiades cluster. Methods. We derive new LiI 670.8nm equivalent width measurements from high-resolution spectra obtained for low-mass Pleiades members. We combine these new measurements with previously published ones, and use the Kepler/K2 rotational periods recently derived for Pleiades cool dwarfs to investigate the lithium-rotation connection in this 125Myr-old cluster. Results. The new data confirm the correlation between lithium equivalent width and stellar spin rate for a sample of 51 early K-type members of the cluster, where fast rotating stars are systematically lithium-rich compared to slowly rotating ones. The correlation is valid for all stars over the (J-Ks) color range 0.50-0.70mag, corresponding to a mass range from about 0.75 to 0.90M, and may extend down to lower masses. Conclusions. We argue that the dispersion in lithium equivalent widths observed for cool dwarfs in the Pleiades cluster reflects an intrinsic scatter in lithium abundances, and suggest that the physical origin of the lithium dispersion pattern is to be found in the pre-main sequence rotational history of solar-type stars. Description: Lithium equivalent widths, abundances, and stellar rotational periods are reported for 148 stars in the Pleiades cluster, partly from published values, partly from new spectroscopic measurements. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tableb1.dat 105 148 Stellar parameters and lithium content for our sample of 148 stars
See also: J/AJ/106/1059 : Lithium in the Pleiades (Soderblom+, 1993) J/A+A/335/183 : Pleiades low-mass stars rotational velocities (Queloz+ 1998) J/MNRAS/408/475 : HATNet Pleiades Rotation Period Catalogue (Hartman+, 2010) J/A+A/577/A148 : The Seven Sisters DANCe. I. Pleiades (Bouy+, 2015) J/A+A/596/A113 : The Seven Sisters DANCe. II. Pleiades (Barrado+, 2016) Byte-by-byte Description of file: tableb1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Star name 10- 18 I9 --- EPIC EPIC number 20- 27 F8.5 deg RAdeg Right ascension (J2000.0) 29- 36 F8.5 deg DEdeg Declinaison (J2000.0) 39- 43 F5.2 mag Vmag ?=- V magnitude 45- 49 F5.3 mag J-K (J-K) color index 51- 58 F8.6 d Per Photometric/rotational period 60- 64 F5.3 mag Amp Photometric amplitude 66 A1 --- l_WLi Limit flag on WLi 67- 71 F5.1 0.1pm WLi Average LiI equivalent width 73- 76 F4.1 0.1pm e_WLi ?=- rms error LiI Eq. Width 78- 83 F6.1 K Teff Effective temperature 85- 89 F5.3 [-] ALi LiI abundance 91- 95 F5.3 [-] e_ALi rms error Li abundance 97-105 A9 --- Bin Multiplicity status
Acknowledgements: Jerome Bouvier, jerome.bouvier(at)univ-grenoble-alpes.fr
(End) Jerome Bouvier [IPAG], Patricia Vannier [CDS] 02-Feb-2018
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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