A Test of the Calibration of the Tully-Fisher Relation Using Cepheid and SNIa Distances

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dc.creatorShanks, T.
dc.date1997-02-17
dc.date1997-02-18
dc.date.accessioned2026-07-07T09:02:06Z
dc.date.available2026-07-07T09:02:06Z
dc.descriptionWe make a direct test of Tully-Fisher distance estimates to eleven spiral galaxies with HST Cepheid distances and to twelve spiral galaxies with SNIa distances. The HST Cepheid distances come from the work of Freedman (1997), Sandage et al (1996) and Tanvir et al (1995). The SNIa distances come from Pierce (1994), calibrated using the Cepheid results of Sandage et al (1996). The Tully-Fisher distances mostly come from the work of Pierce (1994). The results show that the Tully-Fisher distance moduli are too short with respect to the Cepheid distances by 0.46+-0.14mag and too short with respect to the SNIa distances by 0.46+-0.19mag. Combining the HST Cepheid and SNIa data suggests that, overall, previous Tully-Fisher distances were too short by 0.46+-0.11mag, a result which is significant at the 4sigma level. These data therefore indicate that previous Tully-Fisher distances should be revised upwards by 24+-6% implying, for example, a Virgo distance of 19.3+-1.9Mpc. The value of Ho from Tully-Fisher estimates is correspondingly revised downwards from Ho=84+-10 to Ho=68+-8.
dc.description18 pages, 6 Postscript files for text, 2 tables and 3 Figures. Submitted as a Short Communication to MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/9702148
dc.identifierhttp://arxiv.org/abs/astro-ph/9702148
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/148509
dc.subjectAstrophysics
dc.titleA Test of the Calibration of the Tully-Fisher Relation Using Cepheid and SNIa Distances
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