Lithium Abundances of the Local Thin Disk Stars

Details Lithium Abundances of the Local Thin Disk Stars Lithium Abundances of the Local Thin Disk Stars

2004-01-14

arxiv.org/abs/astro-ph/0401259v1

Mon.Not.Roy.Astron.Soc. 349 (2004) 757

Astronomy and Astrophysics

Astrophysics

Accepted for publication in MNRAS, 13 pages including 4 figures

Scientific paper

10.1111/j.1365-2966.2004.07557.x

Lithium abundances are presented for a sample of 181 nearby F and G dwarfs with accurate {\it Hipparcos} parallaxes. The stars are on circular orbits about the Galactic centre and, hence, are identified as belonging to the thin disk. This sample is combined with two published surveys to provide a catalogue of lithium abundances, metallicities ([Fe/H]), masses, and ages for 451 F-G dwarfs, almost all belonging to the thin disk. The lithium abundances are compared and contrasted with published lithium abundances for F and G stars in local open clusters. The field stars span a larger range in [Fe/H] than the clusters for which [Fe/H] $\simeq 0.0\pm0.2$. The initial (i.e., interstellar) lithium abundance of the solar neighborhood, as derived from stars for which astration of lithium is believed to be unimportant, is traced from $\log\epsilon$(Li) = 2.2 at [Fe/H] = -1 to $\log\epsilon$(Li) = 3.2 at $+0.1$. This form for the evolution is dependent on the assumption that astration of lit hium is negligible for the stars defining the relation. An argument is advanced that this latter assumption may not be entirely correct, and, the evolution of lithium with [Fe/H] may be flatter than previously supposed. A sharp Hyades-like Li-dip is not seen among the field stars and appears to be replaced by a large spread among lithium abundances of stars more massive than the lower mass limit of the dip. Astration of lithium by stars of masses too low to participate in the Li-dip is discussed. These stars show little to no spread in lithium abundance at a given [Fe/H] and mass.

Affiliated with

Also associated with

No associations

Rating

Lithium Abundances of the Local Thin Disk Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Lithium Abundances of the Local Thin Disk Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lithium Abundances of the Local Thin Disk Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-633841