The absorption-line strengths of elliptical and S0 galaxies

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

70

Absorption Spectra, Astronomical Spectroscopy, Elliptical Galaxies, Galactic Structure, Spiral Galaxies, Astronomical Catalogs, Colorimetry, Early Stars, Globular Clusters, Spectral Line Width

Scientific paper

A subset of Faber's (1973) ten-color system is used to measure absorption line strengths (LS) and colors of five S0 galaxies, two ellipticals, and three globular clusters. These observations are combined with Faber's in order to analyze LS and color variations among old stellar populations. The LS index (Mg)0 is found to be useful for the study of old stellar populations. This index is calibrated in terms of Fe/H (solar) from -2.2 to -0.5 on the basis of globular clusters and is extended to approximately 0.3 by using Mould's (1978) theoretical calculations. It is shown that most S0's, ellipticals, and globular clusters define a tight relationship in a plot of (Mg)0 vs. (45 - 67)0 and that the principal physical parameter varying along this relationship is most plausibly the average metallicity of the stellar population. The S0's and ellipticals with known or suspected young stellar components are found to deviate from this relationship, along lines termed bluing vectors.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

The absorption-line strengths of elliptical and S0 galaxies 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 The absorption-line strengths of elliptical and S0 galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The absorption-line strengths of elliptical and S0 galaxies will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1483680

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.