Local galaxy ages and metallicities (Terlevich+, 2002)

Details Local galaxy ages and metallicities (Terlevich+, 2002) Local galaxy ages and metallicities (Terlevich+, 2002)

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ycat..73300547t&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/330/547. Originally published in: 2002MNRAS.330..547T

Mathematics

Logic

Galaxy Catalogs, Abundances: [Fe/H], Rotational Velocities, Velocity Dispersion

Scientific paper

We have assembled a catalogue of relative ages, metallicities and abundance ratios for about 150 local galaxies in field, group and cluster environments. The galaxies span morphological types from cD and ellipticals, to late-type spirals. Ages and metallicities were estimated from high-quality published spectral line indices using Worthey & Ottaviani (1997, Cat. ) single stellar population evolutionary models. The identification of galaxy age as a fourth parameter in the fundamental plane (Forbes, Ponman & Brown, 1998ApJ...508L..43F) is confirmed by our larger sample of ages. We investigate trends between age and metallicity, and with other physical parameters of the galaxies, such as ellipticity, luminosity and kinematic anisotropy. We demonstrate the existence of a galaxy age-metallicity relation similar to that seen for local galactic disc stars, whereby young galaxies have high metallicity, while old galaxies span a large range in metallicities. We also investigate the influence of environment and morphology on the galaxy age and metallicity, especially the predictions made by semi-analytic hierarchical clustering models (HCM). We confirm that non-cluster ellipticals are indeed younger on average than cluster ellipticals as predicted by the HCM models. However we also find a trend for the more luminous galaxies to have a higher [Mg/Fe] ratio than the lower luminosity galaxies, which is opposite to the expectation from HCM models.
(3 data files).

Affiliated with

Also associated with

No associations

Rating

Local galaxy ages and metallicities (Terlevich+, 2002) 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 Local galaxy ages and metallicities (Terlevich+, 2002), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local galaxy ages and metallicities (Terlevich+, 2002) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1499695