The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample

By D. Scolnic, David O. Jones, Armin Rest, Yen-Chen Pan, Ryan Chornock, R. Foley, M. Huber, R. Kessler, G. Narayan, A. Riess and 30 more. Astrophysical Journal, 2017

2,256 citations recorded by the source corpus.

We present optical light curves, redshifts, and classifications for spectroscopically confirmed Type Ia supernovae (SNe Ia) discovered by the Pan-STARRS1 (PS1) Medium Deep Survey. We detail improvements to the PS1 SN photometry, astrometry, and calibration that reduce the systematic uncertainties in the PS1 SN Ia distances. We combine the subset of PS1 SNe Ia (0.03 < z < 0.68) with useful distance estimates of SNe Ia from the Sloan Digital Sky Survey (SDSS), SNLS, and various low-z and Hubble Space Telescope samples to form the largest combined sample of SNe Ia, consisting of a total of SNe Ia in the range of 0.01 < z < 2.3, which we call the “Pantheon Sample.” When combining Planck 2015 cosmic microwave background (CMB) measurements with the Pantheon SN sample, we find and for the wCDM model. When the SN and CMB constraints are combined with constraints from BAO and local H0 measurements, the analysis yields the most precise measurement of dark energy to date: and for the CDM model. Tension with a cosmological constant previously seen in an analysis of PS1 and low-z SNe has diminished after an increase of 2× in the statistics of the PS1 sample, improved calibration and photometry, and stricter light-curve quality cuts. We find that the systematic uncertainties in our measurements of dark energy are almost as large as the statistical uncertainties, primarily due to limitations of modeling the low-redshift sample. This must be addressed for future progress in using SNe Ia to measure dark energy.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/14e6b188bd3a7b6849c433561b74f9d9fe79ebb1

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Citations in the corpus

On the Evolution of the Hubble Constant with the SNe Ia Pantheon Sample and Baryon Acoustic Oscillations: A Feasibility Study for GRB-Cosmology in 2030 (2022, methodology): “[1] obtain information on H0 by comparing μobs in [204]1 with μth for each SN.”
The Hubble tension in light of the Full-Shape analysis of Large-Scale Structure data (2020, methodology): “We also consider combinations with Supernovae (SN) measurements from the Pantheon Sample [71], and, finally, the direct measurement of the Hubble constant from the SH0ES collaboration [6].”
Interacting dark energy in the early 2020s: A promising solution to the H0 and cosmic shear tensions (2019, methodology): “distance moduli measurements from the Pantheon sample [277], referring to this dataset as Pantheon.”
The Landscape, the Swampland and the Era of Precision Cosmology (2018, methodology): “It is important to note that the data sets used in our analysis did not include all the information used in [99] to obtain their confidence contours on dark energy (adopted by Heisenberg et al.”
Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14 (2019, methodology): “The use of SNIa to measure cosmological distances (Scolnic et al. 2018) provides independent measurements of the model parameters.”
The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from the anisotropic power spectrum of the quasar sample between redshift 0.8 and 2.2 (2020, methodology): “…polarisation fluctuations in the cosmic microwave background (Planck Collaboration et al. 2018) and the analysis of type Ia supernovae light curves (Scolnic et al. 2018) highly favors a Universe that can be described in the framework of General Relativity (GR) by a standard cosmological model,…”