Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...301...83b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 301, Feb. 1, 1986, p. 83-91.
Astronomy and Astrophysics
Astrophysics
41
Elliptical Galaxies, Galactic Evolution, Magnesium, Star Distribution, Stellar Composition, Abundance, Astronomical Photometry, Brightness Distribution, Galactic Clusters, Gradients, Metallicity
Scientific paper
This paper reports on an effort to determine stellar population gradients in elliptical galaxies by using the magnesium index as population indicator. Using a state-of-the-art CCD camera, medium bandwidth filters, selected observing conditions, unusual calibration procedures, and special image processing steps, the authors obtain a photometric accuracy equivalent to 0.2% of the sky brightness. Observations have been obtained in the Coma Cluster and the authors present results for NGC 4874, one of the two giant ellipticals dominating, the center of the cluster. The magnesium index gradient in NGC 4874 is -0.04±0.01 mag arcsec-1/3, suggesting that the metallicity drops a factor of 3-4 between the nuclear region and the outer halo.
Baum William A.
Morgan Brian L.
Thomsen Bjarne
No associations
LandOfFree
Magnesium gradients in elliptical galaxies. I - Method and initial results 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 Magnesium gradients in elliptical galaxies. I - Method and initial results, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnesium gradients in elliptical galaxies. I - Method and initial results will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1674727