Red giant stars in NGC 5128
| dc.creator | Rejkuba, M. | |
| dc.date | 2004-07-30 | |
| dc.date.accessioned | 2026-07-07T02:14:10Z | |
| dc.date.available | 2026-07-07T02:14:10Z | |
| dc.description | I present a selection of results obtained from VLT FORS1 and ISAAC photometric monitoring of late-type giants in NGC 5128 (=Centaurus A). The combination of optical and near-IR photometry allows to probe the full metallicity range of the stars on the upper red giant branch, thanks to combined low-metallicity sensitivity of the optical and high-metallicity sensitivity of the near-IR bands. The metallicity distribution covers a wide range with the mean value around [M/H] ~ -0.45 dex. The near-IR monitoring of the variable AGB stars allows to gain insights into the age distribution. The period distribution of these long period variables indicates only about 10% contribution of the intermediate-age component (age < 5 Gyr) to the predominantly old stellar halo. Among the brightest, large amplitude and long period variables only very few have near-IR and optical colors consistent with carbon-rich giants. | |
| dc.description | 5 pages, 4 figures, contributed talk at the ESO Workshop: "Planetary Nebulae beyond the Milky Way", held at ESO-Garching (Germany) on May 19-21, 2004 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0407636 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0407636 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/8016 | |
| dc.subject | Astrophysics | |
| dc.title | Red giant stars in NGC 5128 | |
| dc.type | text |