Dark Energy Survey Year 1 Results: A Precise H-0 Estimate from DES Y1, BAO, and D/H Data

Abbott, T. M. C.; Abdalla, F. B.; Annis, J.; Bechtol, K.; Blazek, J.; Benson, B. A.; Bernstein, R. A.; Bernstein, G. M.; Bertin, E.; Brooks, D.; Burke, D. L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Castander, F. J.; Chang, C. L.; Crawford, T. M.; Cunha, C. E.; D'Andrea, C. B.; da Costa, L. N.; Davis, C.; DeRose, J.; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Doel, P.; Drlica-Wagner, A.; Evrard, A. E.; Fernandez, E.; Flaugher, B.; Fosalba, P.; Frieman, J.; Garcia-Bellido, J.; Gaztanaga, E.; Gerdes, D. W.; Giannantonio, T.; Gruen, D.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hartley, W. G.; Henning, J. W.; Honscheid, K.; Hoyle, B.; Huterer, D.; Jain, B.; James, D. J.; Jarvis, M.; Jeltema, T.; Johnson, M. D.; Johnson, M. W. G.; Krause, E.; Kuehn, K.; Kuhlmann, S.; Kuropatkin, N.; Lahav, O.; Liddle, A. R.; Lima, M.; Lin, H.; MacCrann, N.; Maia, M. A. G.; Manzotti, A.; March, M.; Marshall, J. L.; Miquel, R.; Mohr, J. J.; Natoli, T.; Nugent, P.; Ogando, R. L. C.; Park, Y.; Plazas, A. A.; Reichardt, C. L.; Reil, K.; Roodman, A.; Ross, A. J.; Rozo, E.; Rykoff, E. S.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Scolnic, D.; Sevilla-Noarbe, I.; Sheldon, E.; Smith, M.; Smith, R. C.; Soares-Santos, M.; Sobreira, F.; Suchyta, E.; Tarle, G.; Thomas, D.; Troxel, M. A.; Walker, A. R.; Wechsler, R. H.; Weller, J.; Wester, W.; Wu, W. L. K. und Zuntz, J. (2018): Dark Energy Survey Year 1 Results: A Precise H-0 Estimate from DES Y1, BAO, and D/H Data. In: Monthly Notices of the Royal Astronomical Society, Bd. 480, Nr. 3: S. 3879-3888

Abstract

We combine Dark Energy Survey Year 1 clustering and weak lensing data with baryon acoustic oscillations and Big Bang nucleosynthesis experiments to constrain the Hubble constant. Assuming a flat Lambda CDM model with minimal neutrino mass (Sigma m(v), = 0.06 eV), we find H-0 = 67.4(-1.2)(+1.1) km s(-1) Mpc(-1) (68 per cent CL). This result is completely independent of Hubble constant measurements based on the distance ladder, cosmic microwave background anisotropies (both temperature and polarization), and strong lensing constraints. There are now five data sets that: (a) have no shared observational systematics;and (b) each constrains the Hubble constant with fractional uncertainty at the few-per cent level. We compare these five independent estimates, and find that, as a set, the differences between them are significant at the 2.5 sigma level (chi(2)/dof = 24/11, probability to exceed = 1.1 per cent). Having set the threshold for consistency at 30 sigma we combine all five data sets to arrive at H-0 = 69.3(-0.6)(+0.4) km s(-1) Mpc(-1).

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0035-8711
• Sprache: Englisch