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

T M C Abbott,T S Li,R L C Ogando,T F Eifler,D Carollo,R Casas,K Honscheid,M W G Johnson,A K Romer,J Asorey,N Kuropatkin,F Menanteau,S Desai,C Angus,E Kasai,J Lasker,J Frieman,A Carnero Rosell,A Drlica-Wagner,N E Sommer,P Fosalba,F Sobreira,T Giannantonio,I Sevilla-Noarbe,C Lidman,P Challis,R C Thomas,A Clocchiatti,E Macaulay,B Zhang,E Krause,E Swann,L N Da Costa,A V Filippenko,M Smith,M Schubnell,P Wiseman,M A Troxel,P Doel,A Palmese,Y.-C Pan,A Roodman,S Serrano,A Möller,D L Depoy,J Marriner,D Brooks,W G Hartley,J De Vicente,J L Marshall,V Miranda,B Yanny,M A G Maia,D Brout,K Bechtol,M Sullivan,H T Diehl,W Wester,R J Foley,M Soares-Santos,R Kessler,A G Kim,S A Uddin,T Jeltema,R A Gruendl,P Nugent,J K Hoormann,E Kovacs,A R Walker,F J Castander,J Carretero,B Flaugher,D L Hollowood,C E Cunha,D Scolnic,M Pursiainen,V Scarpine,A E Evrard,G M Bernstein,L Galbany,S R Hinton,S Allam,C J Miller,B Nord,B Hoyle,O Lahav,M Carrasco Kind,E S Rykoff,E Bertin,R C Wolf,D L Burke,M Lima,E Morganson,R Cawthon,S Kent,R Miquel,E Suchyta,C B D’Andrea,C Davis,D A Finley,M Childress,A A Plazas,M March,J J Mohr,R C Nichol,D J James,J Gschwend,H Spinka,Geraint F Lewis ,S E Kuhlmann ,S González–Gaitán ,Arturo Avelino ,K Kuêhn ,B Tucker ,Hai-Nan Lin ,G Tarlé ,David Gruen ,G Gutiérrez ,J García-Bellido ,Bruce A Bassett ,Daniel Muthukrishna ,Robert Sharp ,Eduardo Rozo ,R Gupta ,P J Brown ,Josh Calcino ,R H Schindler ,E Gaztañaga ,S Ávila ,D Goldstein ,M Šako ,Paul Martini ,T M Davis ,R Kirshner ,Karl Glazebrook ,Eric H Neilsen ,Per H Andersen ,E Fernández ,Michael D Johnson ,Daniel B Thomas ,E Sánchez ,Kaisey S Mandel ,Richard G Krön ,Y Zhang

doi:10.3847/2041-8213/ab04fa

Abstract

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 ΛCDM model we find a matter density . 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 , and . For a flat w 0 w a CDM model, and combining probes from SN Ia, CMB and baryon acoustic oscillations, we find and . These results are in agreement with a cosmological constant and with previous constraints using SNe Ia (Pantheon, JLA).

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