First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters

Abbott, T. M. C.; Allam, S.; Andersen, P.; Angus, C.; Asorey, J.; Avelino, A.; Avila, S.; Bassett, B. A.; Bechtol, K.; Bernstein, G. M.; Bertin, E.; Brooks, D.; Brout, D.; Brown, P.; Burke, D. L.; Calcino, J.; Carnero Rosell, A.; Carollo, D.; Kind, M. Carrasco; Carretero, J.; Casas, R.; Castander, F. J.; Cawthon, R.; Challis, P.; Childress, M.; Clocchiatti, A.; Cunha, C. E.; D'Andrea, C. B.; da Costa, L. N.; Davis, C.; Davis, T. M.; De Vicente, J.; DePoy, D. L.; Desai, S.; Diehl, H. T.; Doel, P.; Drlica-Wagner, A.; Eifler, T. F.; Evrard, A. E.; Fernandez, E.; Filippenko, A.; Finley, D. A.; Flaugher, B.; Foley, R. J.; Fosalba, P.; Frieman, J.; Galbany, L.; Garcia-Bellido, J.; Gaztanaga, E.; Giannantonio, T.; Glazebrook, K.; Goldstein, D. A.; Gonzalez-Gaitan, S.; Grün, D.; Gründl, R. A.; Gschwend, J.; Gupta, R. R.; Gutierrez, G.; Hartley, W. G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; Hoormann, J. K.; Hoyle, B.; James, D. J.; Jeltema, T.; Johnson, M. W. G.; Johnson, M. D.; Kasai, E.; Kent, S.; Kessler, R.; Kim, A. G.; Kirshner, R. P.; Kovacs, E.; Krause, E.; Kron, R.; Kühn, K.; Kuhlmann, S.; Kuropatkin, N.; Lahav, O.; Lasker, J.; Lewis, G. F.; Li, T. S.; Lidman, C.; Lima, M.; Lin, H.; Macaulay, E.; Maia, M. A. G.; Mandel, K. S.; March, M.; Marriner, J.; Marshall, J. L.; Martini, P.; Menanteau, F.; Miller, C. J.; Miquel, R.; Miranda, V; Mohr, J. J.; Morganson, E.; Muthukrishna, D.; Moller, A.; Neilsen, E.; Nichol, R. C.; Nord, B.; Nugent, P.; Ogando, R. L. C.; Palmese, A.; Pan, Y-C; Plazas, A. A.; Pursiainen, M.; Romer, A. K.; Roodman, A.; Rozo, E.; Rykoff, E. S.; Sako, M.; Sanchez, E.; Scarpine, V; Schindler, R.; Schubnell, M.; Scolnic, D.; Serrano, S.; Sevilla-Noarbe, I; Sharp, R.; Smith, M.; Soares-Santos, M.; Sobreira, F.; Sommer, N. E.; Spinka, H.; Suchyta, E.; Sullivan, M.; Swann, E.; Tarle, G.; Thomas, D.; Thomas, R. C.; Troxel, M. A.; Tucker, B. E.; Uddin, S. A.; Walker, A. R.; Wester, W.; Wiseman, P.; Wolf, R. C.; Yanny, B.; Zhang, B.; Zhang, Y. (2019): First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters. In: Astrophysical Journal Letters, Vol. 872, No. 2, L30

Abstract

We present the first cosmological parameter constraints using measurements of type Ia supernovae (SNe Ia) from the Dark Energy Survey Supernova Program (DES-SN). The analysis uses a subsample of 207 spectroscopically confirmed SNe. Ia from the first three years of DES-SN, combined with a low-redshift sample of 122 SNe from the literature. Our "DES-SN3YR" result from these 329 SNe. Ia is based on a series of companion analyses and improvements covering SN. Ia discovery, spectroscopic selection, photometry, calibration, distance bias corrections, and evaluation of systematic uncertainties. For a flat Lambda CDM model we find a matter density Omega(m) = 0.331 +/- 0.038. For a flat wCDM model, and combining our SN. Ia constraints with those from the cosmic microwave background (CMB), we find a dark energy equation of state w = -0.978 +/- 0.059, and Omega(m) = 0.321 +/- 0.018. For a flat w(0)w(a)CDM model, and combining probes from SN. Ia, CMB and baryon acoustic oscillations, we find w(0) = -0.885 +/- 0.114 and w(a) = -0.387 +/- 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe. Ia (Pantheon, JLA).

• Item Type: Journal article
• Faculties: Physics
• Subjects: 500 Science > 530 Physics
• ISSN: 2041-8205
• Language: English