The Ages of Early-Type Galaxies: A Cautionary Tale
| dc.creator | Trager, S. C. | |
| dc.date | 1999-06-24 | |
| dc.date | 1999-06-25 | |
| dc.date.accessioned | 2026-07-07T02:32:10Z | |
| dc.date.available | 2026-07-07T02:32:10Z | |
| dc.description | Early-type galaxies are not the simple Population II systems they have long been assumed to be. While upwards of 80% of the stellar mass of early-type galaxies likely formed at high redshift, small frostings of intermediate-age stellar populations (a few to 20% percent by mass of 1-2 Gyr old stars) are present in nearly every field and group early-type galaxy and in at least some cluster early-types. These frostings of young stars have little effect on the determination of photometric redshifts, thanks to the age-metallicity degeneracy of broad-band colors, but even mild bursts of star formation at modest redshifts (a few tenths) may make identification of the progenitors of today's early-type galaxies difficult at cosmological distances. | |
| dc.description | 6 pages, 6 eps figures; to appear in "Photometric Redshifts and High Redshift Galaxies", eds. R. Weymann, L. Storrie-Lombardi, M. Sawicki & R. Brunner. Figure 4 caption revised | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9906396 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9906396 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14414 | |
| dc.subject | Astrophysics | |
| dc.title | The Ages of Early-Type Galaxies: A Cautionary Tale | |
| dc.type | text |