Derivation of Distances with the Tully-Fisher Relation: The Antlia Cluster
| dc.creator | Bonhomme, N. | |
| dc.creator | Courtois, H. M. | |
| dc.creator | Tully, R. B. | |
| dc.date | 2008-06-06 | |
| dc.date.accessioned | 2026-07-07T09:43:06Z | |
| dc.date.available | 2026-07-07T09:43:06Z | |
| dc.description | The Tully-Fisher relation is a correlation between the luminosity and the HI 21cm line width in spiral galaxies (LLW relation). It is used to derive galaxy distances in the interval 7 to 100 Mpc. Closer, the Cepheids, TRGB and Surface Brightness Fluctuation methods give a better accuracy. Further, the SNIa are luminous objects still available for distance measurement purposes, though with a dramatically lower density grid of measurements on the sky. Galaxies in clusters are all at the same distance from the observer. Thus the distance of the cluster derived from a large number of galaxies (N) has an error reduced according to the square root of N. However, not all galaxies in a cluster are suitable for the LLW measurement. The selection criteria we use are explained hereafter; the important point being to avoid Malmquist bias and to not introduce any systematics in the distance measurement. | |
| dc.description | Moriond08 | |
| dc.identifier | https://arxiv.org/abs/0806.1140 | |
| dc.identifier | http://arxiv.org/abs/0806.1140 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/162427 | |
| dc.subject | Astrophysics | |
| dc.title | Derivation of Distances with the Tully-Fisher Relation: The Antlia Cluster | |
| dc.type | text |