期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 686, 期 2, 页码 L75-L78出版社
IOP PUBLISHING LTD
DOI: 10.1086/592964
关键词
distance scale; galaxies: distances and redshifts
资金
- NASA
- NSF
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 H(0).
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