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New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant
Open accessAbstract
We present new measurements of the parallax of seven long-period (≥10 days) Milky Way (MW) Cepheid variables (SS CMa, XY Car, VY Car, VX Per, WZ Sgr, X Pup, and S Vul) using one-dimensional astrometric measurements from spatial scanning of Wide-Field Camera 3 on the Hubble Space Telescope (HST). The observations were obtained at ∼6 month intervals over 4 years. The distances are 1.7–3.6 kpc, with a mean precision of 45 μ as (signal-to-noise ratio (S/N) ≈ 10) and a best precision of 29 μ as (S/N = 14). The accuracy of the parallaxes is demonstrated through independent analyses of >100 reference stars. This raises to 10 the number of long-period Cepheids with significant parallax measurements, 8 obtained from this program. We also present high-precision mean F 555 W, F 814 W, and F 160 W magnitudes of these Cepheids, allowing a direct, zeropoint-independent comparison to >1800 extragalactic Cepheids in the hosts of 19 SNe Ia. This sample addresses two outstanding systematic uncertainties affecting prior comparisons of MW and extragalactic Cepheids used to calibrate the Hubble constant (H 0): their dissimilarity of periods and photometric systems. Comparing the new parallaxes to their predicted values derived from reversing the distance ladder gives a ratio (or independent scale for H 0) of 1.037 ± 0.036, consistent with no change and inconsistent at the 3.5 σ level with a ratio of 0.91 needed to match the value predicted by Planck cosmic microwave background data in concert with ΛCDM. Using these data instead to augment the Riess et al. measurement of H 0 improves the precision to 2.3%, yielding 73.48 ± 1.66 km s−1 Mpc−1, and the tension with Planck + ΛCDM increases to 3.7 σ. The future combination of Gaia parallaxes and HST spatial scanning photometry of 50 MW Cepheids can support a <1% calibration of H 0.
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Cites
The Two Micron All Sky Survey (2MASS)
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A relation between distance and radial velocity among extra-galactic nebulae
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A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT*
Riess, A. G., Macri, L. M., Hoffmann, S. L., Scolnic, D., Casertano, S., Filippenko, A. V., Tucker, B. E., Reid, M. J., Jones, D. O., Silverman, J. M., et al. (2016) · The Astrophysical Journal · doi:10.3847/0004-637x/826/1/56 · Cited by 2,242
Self-citationA synthetic view on structure and evolution of the Milky Way
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Self-citationModelling the Galactic interstellar extinction distribution in three dimensions
Marshall, D. J., Robin, A. C., Reylé, C., Schultheis, M., & Picaud, S. (2006) · Astronomy & Astrophysics · doi:10.1051/0004-6361:20053842 · Cited by 696
An eclipsing-binary distance to the Large Magellanic Cloud accurate to two per cent
Pietrzyński, G., Graczyk, D., Gieren, W., Thompson, I. B., Pilecki, B., Udalski, A., Soszyński, I., Kozłowski, S., Konorski, P., Suchomska, K., et al. (2013) · Nature · doi:10.1038/nature11878 · Cited by 670
Gaia Data Release 1: Astrometry: one billion positions, two million proper motions and parallaxes
Lindegren, L., Lammers, U., Bastian, U., Hernández, J., Klioner, S., Hobbs, D., Bombrun, A., Michalik, D., Ramos-Lerate, M., Butkevich, A., et al. (2016) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201628714 · Cited by 614
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Cited by
Dark Matter as a Topological Vacuum Condensate
Planck Collaboration, Aghanim, N., Akrami, Y., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., Barreiro, R. B., Bartolo, N., et al. (2018) · arXiv (Cornell University) · doi:10.48550/arxiv.1807.06209 · Cited by 3,403
Riess, A. G., Yuan, W., Macri, L. M., Scolnic, D., Brout, D., Casertano, S., Jones, D. O., Murakami, Y., Anand, G. S., Breuval, L., et al. (2022) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/ac5c5b · Cited by 2,380
Self-citationIn the realm of the Hubble tension—a review of solutions *
Di Valentino, E., Mena, O., Pan, S., Visinelli, L., Yang, W., Melchiorri, A., Mota, D. F., Riess, A. G., & Silk, J. (2021) · Classical and Quantum Gravity · doi:10.1088/1361-6382/ac086d · Cited by 2,065
Self-citationPlanck 2018 results: I. Overview and the cosmological legacy of Planck
Planck Collaboration, Aghanim, N., Akrami, Y., Arroja, F., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., Barreiro, R. B., et al. (2020) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201833880 · Cited by 1,635
Riess, A. G., Casertano, S., Yuan, W., Bowers, J. B., Macri, L., Zinn, J. C., & Scolnic, D. (2021) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/abdbaf · Cited by 815
Self-citation
Metadata
- Authors
- Riess, A. G., Casertano, S., Yuan, W., Macri, L., Anderson, J., MacKenty, J. W., Bowers, J. B., Clubb, K. I., Filippenko, A. V., Jones, D. O., & Tucker, B. E.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2018-03-10
- Volume
- 855
- Issue
- 2
- Pages
- 136
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2782530178
- Cited by
- 532
- References
- 50
- FWCI
- 52.05
- Type
- journal article
- Language
- en
- Open access
- green
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- Riess, A. G., Casertano, S., Yuan, W., Macri, L., Anderson, J., MacKenty, J. W., Bowers, J. B., Clubb, K. I., Filippenko, A. V., Jones, D. O., & Tucker, B. E. (2018). New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant. The Astrophysical Journal. https://doi.org/10.3847/1538-4357/aaadb7
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