A new calibration of the RGB Tip as a Standard Candle
| dc.creator | Bellazzini, Michele | |
| dc.creator | Ferraro, Francesco R. | |
| dc.creator | Pancino, Elena | |
| dc.date | 2001-10-30 | |
| dc.date.accessioned | 2026-07-07T02:01:04Z | |
| dc.date.available | 2026-07-07T02:01:04Z | |
| dc.description | We have obtained an accurate estimate of the absolute I magnitude of the Tip of the Red Giant Branch (M_I(TRGB)) for the globular cluster Omega Cen, based {\em (a)} on the largest photometric database ever assembled for a globular, by Pancino et al. (2000), and {\em (b)} on a direct distance estimate for \omen, recently obtained by Thompson et al.(2001) from a detached eclipsing binary. The derived value M_I(TRGB) = -4.04\pm 0.12 provides, at present, the most accurate empirical zero-point for the calibration of the \mtip -- [Fe/H] relation, at [Fe/H] ~ -1.7. | |
| dc.description | 6 pages, 2 .ps figures, latex, hrd_pasp.sty macro included. To appear in "Observed HR diagrams and stellar evolution: the interplay between observational constraints and theory", (Coimbra, June, 2001) ASP Conf. Ser., 2001, T. Lejeune and J. Fernandes, eds | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0110645 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0110645 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/3621 | |
| dc.subject | Astrophysics | |
| dc.title | A new calibration of the RGB Tip as a Standard Candle | |
| dc.type | text |