The Pantheon+ Analysis: The Full Data Set and Light-curve Release
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Résumé
Abstract Here we present 1701 light curves of 1550 unique, spectroscopically confirmed Type Ia supernovae (SNe Ia) that will be used to infer cosmological parameters as part of the Pantheon+ SN analysis and the Supernovae and H 0 for the Equation of State of dark energy distance-ladder analysis. This effort is one part of a series of works that perform an extensive review of redshifts, peculiar velocities, photometric calibration, and intrinsic-scatter models of SNe Ia. The total number of light curves, which are compiled across 18 different surveys, is a significant increase from the first Pantheon analysis (1048 SNe), particularly at low redshift ( z ). Furthermore, unlike in the Pantheon analysis, we include light curves for SNe with z < 0.01 such that SN systematic covariance can be included in a joint measurement of the Hubble constant ( H 0 ) and the dark energy equation-of-state parameter ( w ). We use the large sample to compare properties of 151 SNe Ia observed by multiple surveys and 12 pairs/triplets of “SN siblings”—SNe found in the same host galaxy. Distance measurements, application of bias corrections, and inference of cosmological parameters are discussed in the companion paper by Brout et al., and the determination of H 0 is discussed by Riess et al. These analyses will measure w with ∼3% precision and H 0 with ∼1 km s −1 Mpc −1 precision.
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La notice
- Revue
- The Astrophysical Journal
- Thématique
- Gamma-ray bursts and supernovae
- Domaine
- Physics and Astronomy
- Établissements canadiens
- —
- Organismes subventionnaires
- Planetary Science DivisionScience Mission DirectorateSmithsonian Astrophysical ObservatoryUniversity of EdinburghMax-Planck-Institut für AstronomieGordon and Betty Moore FoundationQueen's University BelfastLos Alamos National LaboratoryAlfred P. Sloan FoundationJohns Hopkins UniversityDavid and Lucile Packard FoundationU.S. Department of EnergySmithsonian InstitutionJohn Templeton FoundationSpace Telescope Science InstituteDurham UniversityNational Aeronautics and Space AdministrationQueen's UniversityAdolph C. and Mary Sprague Miller Institute for Basic Research in Science, University of California BerkeleyNational Central UniversityNuclear Safety and Security CommissionHeising-Simons FoundationEötvös Loránd TudományegyetemNational Science Foundation
- Mots-clés
- PhysicsDark energyLight curveRedshiftSupernovaAstrophysicsHubble's lawGalaxyEquation of stateCosmologyAstronomy
- Résumé présent dans OpenAlex
- oui