Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aj.....87.1679h&link_type=abstract
Astronomical Journal, vol. 87, Dec. 1982, p. 1679-1709. Research supported by the University of Illinois
Astronomy and Astrophysics
Astronomy
108
Abundance, Astronomical Catalogs, Giant Stars, Milky Way Galaxy, Stellar Spectrophotometry, Velocity Distribution, A Stars, Cyanogen, Hydrogen, Iron, K Stars, Radial Velocity, Stellar Evolution, Stellar Magnitude
Scientific paper
The DDO intermediate band system is used to obtain detailed information about abundance gradients and velocity dispersions in the galaxy, with an emphasis on the properties of halo stars in the range of from 1 to 5 kpc. The DDO abundance index is calibrated agianst (Fe/H) for metal-poor stars, with a resulting gradient of about -0.2 per kpc. However, when the sample is divided into two subsamples with (Fe/H) less than -0.5 and equal to or greater than -0.5, the gradients are -0.14 and 0.00, respectively. DDO observations of about 1000 stars, mostly G5-K5 giants, show that the velocity dispersion increases both with decrease in metallicity and increase in z distance. The abundances found for high-z stars are similar to the A-star results of Rodgers (1971) in that about half the K giants above 1 kpc appear to have solar abundances.
Hartkopf William I.
Yoss Kenneth M.
No associations
LandOfFree
A kinematic and abundance survey at the galactic poles 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 A kinematic and abundance survey at the galactic poles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A kinematic and abundance survey at the galactic poles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-927526