Blue supergiants and the zero point of the Tully-Fisher relation: a path to a new independent test of the Hubble constant
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866908607631589376 |
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| author | Kudritzki, Rolf-Peter Bresolin, Fabio Urbaneka, Miguel A. Sextl, Eva |
| author_facet | Kudritzki, Rolf-Peter Bresolin, Fabio Urbaneka, Miguel A. Sextl, Eva |
| contents | Blue supergiant distances of nearby galaxies obtained with the flux-weighted gravity-luminosity relationship are used for a measurement of the zero points of Tully-Fisher relationships at different photometric passbands. The Cousins I-band and the infrared WISE bands W1 and W2 are investigated. The results are compared with previous work using Cepheid and Tip-of-the-Red-Giant-Branch distances. No significant differences were encountered. This supports the large values of the Hubble constant greater than 73km/s/Mpc found with the Tully-Fisher distance ladder work over the last decade. Applying blue supergiant distances on the I-band Tully-Fisher relation observations yields a Hubble constant H0 = 76.2+/-6.2 km/s/Mpc. The large uncertainty is caused by the still relatively small blue supergiant galaxies sample size but will be reduced in future work. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_20652 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Blue supergiants and the zero point of the Tully-Fisher relation: a path to a new independent test of the Hubble constant Kudritzki, Rolf-Peter Bresolin, Fabio Urbaneka, Miguel A. Sextl, Eva Cosmology and Nongalactic Astrophysics Blue supergiant distances of nearby galaxies obtained with the flux-weighted gravity-luminosity relationship are used for a measurement of the zero points of Tully-Fisher relationships at different photometric passbands. The Cousins I-band and the infrared WISE bands W1 and W2 are investigated. The results are compared with previous work using Cepheid and Tip-of-the-Red-Giant-Branch distances. No significant differences were encountered. This supports the large values of the Hubble constant greater than 73km/s/Mpc found with the Tully-Fisher distance ladder work over the last decade. Applying blue supergiant distances on the I-band Tully-Fisher relation observations yields a Hubble constant H0 = 76.2+/-6.2 km/s/Mpc. The large uncertainty is caused by the still relatively small blue supergiant galaxies sample size but will be reduced in future work. |
| title | Blue supergiants and the zero point of the Tully-Fisher relation: a path to a new independent test of the Hubble constant |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2510.20652 |