Abundances of halo early-type stars (Rolleston+, 1999)

Details Abundances of halo early-type stars (Rolleston+, 1999) Abundances of halo early-type stars (Rolleston+, 1999)

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ycat..33470069r&link_type=abstract

VizieR On-line Data Catalog: J/A+A/347/69. Originally published in: 1999A&A...347...69R

Computer Science

Stars: Early-Type, Equivalent Widths, Abundances

Scientific paper

We present echelle (R~40,000) spectroscopic observations for a sample of apparently normal, high Galactic latitude, early-type stars drawn from the Palomar-Green Survey. The metal-line spectra show evidence for rotational velocity broadening with values of vsini<=300km/s. In conjunction with Kurucz model atmospheres, we derive stellar photospheric abundances that are consistent with a Population I chemical composition; differential abundances with respect to Galactic disk Population I stars indicate no abundance differences outside the estimated errors. From a comparison of the derived atmospheric parameters with recent theoretical evolutionary models, we derive distance and age estimates for individual stars. Using kinematical considerations, we conclude that all these objects are `runaway' stars, formed in the Galactic disk and subsequently ejected, possibly by supernovae explosions or dynamical interactions. (2 data files).

Affiliated with

Also associated with

No associations

Rating

Abundances of halo early-type stars (Rolleston+, 1999) 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 Abundances of halo early-type stars (Rolleston+, 1999), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abundances of halo early-type stars (Rolleston+, 1999) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-896838