First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
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 LCDM 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 w0waCDM model, and combining probes from SN Ia, CMB and baryon acoustic oscillations, we find w0 = -0.885 +_ 0.114 and wa = -0.387 +_ 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe Ia (Pantheon, JLA).
Keywords
Cite
@article{arxiv.1811.02374,
title = {First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters},
author = {T. M. C. Abbott and S. Allam and P. Andersen and C. Angus and J. Asorey and A. Avelino and S. Avila and B. A. Bassett and K. Bechtol and G. M. Bernstein and E. Bertin and D. Brooks and D. Brout and P. Brown and D. L. Burke and J. Calcino and A. Carnero Rosell and D. Carollo and M. Carrasco Kind and J. Carretero and R. Casas and F. J. Castander and R. Cawthon and P. Challis and M. Childress and A. Clocchiatti and C. E. Cunha and C. B. D'Andrea and L. N. da Costa and C. Davis and T. M. Davis and J. De Vicente and D. L. DePoy and S. Desai and H. T. Diehl and P. Doel and A. Drlica-Wagner and T. F. Eifler and A. E. Evrard and E. Fernandez and A. V. Filippenko and D. A. Finley and B. Flaugher and R. J. Foley and P. Fosalba and J. Frieman and L. Galbany and J. Garcia-Bellido and E. Gaztanaga and T. Giannantonio and K. Glazebrook and D. A. Goldstein and S. Gonzalez-Gaitan and D. Gruen and R. A. Gruendl and J. Gschwend and R. R. Gupta and G. Gutierrez and W. G. Hartley and S. R. Hinton and D. L. Hollowood and K. Honscheid and J. K. Hoormann and B. Hoyle and D. J. James and T. Jeltema and M. W. G. Johnson and M. D. Johnson and E. Kasai and S. Kent and R. Kessler and A. G. Kim and R. P. Kirshner and E. Kovacs and E. Krause and R. Kron and K. Kuehn and S. Kuhlmann and N. Kuropatkin and O. Lahav and J. Lasker and G. F. Lewis and T. S. Li and C. Lidman and M. Lima and H. Lin and E. Macaulay and M. A. G. Maia and K. S. Mandel and M. March and J. Marriner and J. L. Marshall and P. Martini and F. Menanteau and C. J. Miller and R. Miquel and V. Miranda and J. J. Mohr and E. Morganson and D. Muthukrishna and A. Möller and E. Neilsen and R. C. Nichol and B. Nord and P. Nugent and R. L. C. Ogando and A. Palmese and Y. -C. Pan and A. A. Plazas and M. Pursiainen and A. K. Romer and A. Roodman and E. Rozo and E. S. Rykoff and M. Sako and E. Sanchez and V. Scarpine and R. Schindler and M. Schubnell and D. Scolnic and S. Serrano and I. Sevilla-Noarbe and R. Sharp and M. Smith and M. Soares-Santos and F. Sobreira and N. E. Sommer and H. Spinka and E. Suchyta and M. Sullivan and E. Swann and G. Tarle and D. Thomas and R. C. Thomas and M. A. Troxel and B. E. Tucker and S. A. Uddin and A. R. Walker and W. Wester and P. Wiseman and R. C. Wolf and B. Yanny and B. Zhang and Y. Zhang},
journal= {arXiv preprint arXiv:1811.02374},
year = {2019}
}