Deep VLT search for globular clusters in NGC 5128: Color-magnitude diagrams and globular cluster luminosity function
| dc.contributor.author | Rejkuba, M | |
| dc.date.accessioned | 2025-01-21T01:30:54Z | |
| dc.date.available | 2025-01-21T01:30:54Z | |
| dc.date.issued | 2001 | |
| dc.description.abstract | At the distance of NGC 5128 (3.6 +/- 0.2 Mpc) it is possible to resolve globular clusters with high resolution imaging from the ground, thus allowing the globular cluster candidate selection primarily through their morphological properties. I report the discovery of 71 globular clusters in NGC 5128 on VLT UT1-FORS1 images, including the faintest members (M-V similar to -5) known to date in this galaxy as well as in 6 previously-known clusters. U- and V-band photometry has been measured for all the candidates and the luminosity function, spanning -10.1 < M-V < -4.9 and -9.3 < M-U < -3.3, constructed. These are the deepest globular cluster luminosity functions in an elliptical galaxy determined so far. The Kolmogorov-Smirnov statistics show that the difference between the globular cluster luminosity functions of NGC 5128 and the MW is not larger than the difference between the ones of M 31 and the MW. The (U - V)(0) color histogram shows a bimodal distribution. For 23 globular clusters I obtained K-band images with SOF1 at the NTT in La Silla. Their positions in the (U - V) vs. (V - K) color-color diagram indicate that they are indeed old globular clusters. Assuming that the globular clusters in NGC 5128 span a similar age range as the ones in the Milky Way and adopting a linear fit between the metallicity and (U - V)(0) color, the metal-rich clusters peak at [Fe/H] = -0.6 dex and the metal-poor ones peak at [Fe/H] = -1.7 dex. | |
| dc.fuente.origen | WOS | |
| dc.identifier.eissn | 1432-0746 | |
| dc.identifier.issn | 0004-6361 | |
| dc.identifier.uri | https://repositorio.uc.cl/handle/11534/96925 | |
| dc.identifier.wosid | WOS:000168457800011 | |
| dc.issue.numero | 3 | |
| dc.language.iso | en | |
| dc.pagina.final | 825 | |
| dc.pagina.inicio | 812 | |
| dc.revista | Astronomy & astrophysics | |
| dc.rights | acceso restringido | |
| dc.subject | galaxies : star clusters | |
| dc.subject | galaxies : formation | |
| dc.subject | galaxies : individual : NGC 5128 | |
| dc.title | Deep VLT search for globular clusters in NGC 5128: Color-magnitude diagrams and globular cluster luminosity function | |
| dc.type | artículo | |
| dc.volumen | 369 | |
| sipa.index | WOS | |
| sipa.trazabilidad | WOS;2025-01-12 |