AM stars of the Hyades cluster - Temperatures, lithium, and the heavier elements, Al, Si, and Fe

Details AM stars of the Hyades cluster - Temperatures, lithium, and the heavier elements, Al, Si, and Fe AM stars of the Hyades cluster - Temperatures, lithium, and the heavier elements, Al, Si, and Fe

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220..197b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 197-205.

Astronomy and Astrophysics

Astrophysics

63

A Stars, M Stars, Star Clusters, Stellar Composition, Stellar Temperature, Abundance, Aluminum, Iron, Lithium, Silicon

Scientific paper

Six Am stars in the Hyades cluster have been observed for their Li content with the Canada-France-Hawaii telescope at high spectral resolution and high signal-to-noise ratios. Abundances have been determined for Li, Al, Si, (Ca), and Fe from a model atmosphere abundance analysis after checking the effective temperature scale derived from uvby, β photometry.
From the initial content of the cluster there is in the atmospheres of those Am stars no enhancement (or marginally) of Al, no enhancement of Si, and a moderate enhancement of Fe with our temperature scale. The comparison of these results with those of Conti (1965) shows that it may be possible to build up a consistent set of abundances of Am stars coming from different studies.
Except for one Li-deficient star, the sharp-lined Am stars, ranging from 7350 K to 9050 K and presumably having the same age and original interstellar material, have all preserved the "initial" normal Li content of the cluster, log N(Li) = 3.0 with log N(H) = 12.0; among these stars there is one blue straggler.
Adding the results from the Coma Berenices star cluster of nearly the same age as the Hyades (Boesgaard, 1987), the Li abundance of the Am stars is found to be constant and normal, but near 8000 K there is an anomaly and the abundance range is 1.2 dex with one star Li-overabundant, one star Li-underabundant, and the other stars normal.
The abundance behaviour of Ca and Li in the Am stars of both clusters is discussed within the frame of the diffusion theory.

Affiliated with

Also associated with

No associations

Rating

AM stars of the Hyades cluster - Temperatures, lithium, and the heavier elements, Al, Si, and Fe 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 AM stars of the Hyades cluster - Temperatures, lithium, and the heavier elements, Al, Si, and Fe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and AM stars of the Hyades cluster - Temperatures, lithium, and the heavier elements, Al, Si, and Fe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1513667