| Title | The Extragalactic Distance Scale without Cepheids |
| Authors | Mould, Jeremy; Sakai, Shoko |
| Bibcode | 2008ApJ...686L..75M Search ADS ↗ |
| Abstract | Distances of galaxies in the Hubble Space Telescope Key Project are based on the Cepheid period-luminosity relation. An alternative basis is the tip of the red giant branch. Using archival HST data, we calibrate the infrared Tully-Fisher relation using 14 galaxies with tip of the red giant branch measurements. Compared with the Key Project, a higher value of the Hubble constant by 10% ± 7% is inferred. Within the errors the two distance scales are therefore consistent. We describe the additional data required for a conclusive tip of the red giant branch measurement of H0. |
| Objects | 15 Objects Search NED ↙ |
