Lithium in very metal poor thick disk stars

Details Lithium in very metal poor thick disk stars Lithium in very metal poor thick disk stars

1997-09-25

arxiv.org/abs/astro-ph/9709242v1

Mon.Not.Roy.Astron.Soc. 292 (1997) L1

Astronomy and Astrophysics

Astrophysics

Accepted MNRAS, 4 pages, 2 figures, uses mn.tex

Scientific paper

A search for lithium is performed on seven metal poor dwarfs with metallicities ranging from [Fe/H]=-1.5 down to [Fe/H]=-3.0 but showing disk-like kinematics. These stars belong to the metal poor tail of the Galactic thick disk and they may be also the result of an accretion event (Beers and Sommer-Larsen 1995). The Li 6707.8 A line is present in all the seven dwarfs. The weighted average of the Li abundance for the stars is A(Li)=2.20 (+/-0.06) and is consistent within the errors with the plateau Li abundance of A(Li)=2.24(+/- 0.012) found in genuine halo stars in the same range of metallicities (Bonifacio and Molaro 1997). One of the stars, CS 22182-24, shows somewhat lower Li abundance (A(Li)=1.6(+/-0.40)) and is a candidate to being a Li-poor star. Whether this group of stars belongs to the oldest stars in the disk or to the old population of an external galaxy accreted by the Milky Way, the present observations provide support to the universality of a pre-Galactic Li abundance as is observed in the Galactic halo stars.

Affiliated with

Also associated with

No associations

Rating

Lithium in very metal poor thick 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 in very metal poor thick disk stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lithium in very metal poor thick disk stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-201363