Using the Baryonic Tully–Fisher Relation to Measure H{sub o}
Journal Article
·
· The Astronomical Journal (Online)
- Institute for Fundamental Science, University of Oregon, Eugene, OR 97403 (United States)
- Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106 (United States)
- School of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff, CF24 3AA (United Kingdom)
We explore the use of the baryonic Tully–Fisher relation (bTFR) as a new distance indicator. Advances in near-IR imaging and stellar population models, plus precise rotation curves, have reduced the scatter in the bTFR such that distance is the dominant source of uncertainty. Using 50 galaxies with accurate distances from Cepheids or the tip magnitude of the red giant branch, we calibrate the bTFR on a scale independent of H {sub o}. We then apply this calibrated bTFR to 95 independent galaxies from the SPARC sample, using CosmicFlows-3 velocities, to deduce the local value of H {sub o}. We find H {sub o} = 75.1 ± 2.3 (stat) ±1.5 (sys) km s{sup −1} Mpc{sup −1}.
- OSTI ID:
- 23013303
- Journal Information:
- The Astronomical Journal (Online), Journal Name: The Astronomical Journal (Online) Journal Issue: 2 Vol. 160; ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
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