Type Ia Supernova Distances at Redshift >1.5 from the Hubble Space Telescope Multi-cycle Treasury Programs: The Early Expansion Rate

By A. Riess, S. Rodney, D. Scolnic, D. Shafer, L. Strolger, H. Ferguson, M. Postman, O. Graur, D. Maoz, S. Jha and 24 more. 2017

199 citations recorded by the source corpus.

We present an analysis of 15 Type Ia supernovae (SNe Ia) at redshift (9 at ) recently discovered in the CANDELS and CLASH Multi-Cycle Treasury programs using WFC3 on the Hubble Space Telescope. We combine these SNe Ia with a new compilation of ∼1050 SNe Ia, jointly calibrated and corrected for simulated survey biases to produce accurate distance measurements. We present unbiased constraints on the expansion rate at six redshifts in the range based only on this combined SN Ia sample. The added leverage of our new sample at leads to a factor of ∼3 improvement in the determination of the expansion rate at z = 1.5, reducing its uncertainty to ∼20%, a measurement of . We then demonstrate that these six derived expansion rate measurements alone provide a nearly identical characterization of dark energy as the full SN sample, making them an efficient compression of the SN Ia data. The new sample of SNe Ia at usefully distinguishes between alternative cosmological models and unmodeled evolution of the SN Ia distance indicators, placing empirical limits on the latter. Finally, employing a realistic simulation of a potential Wide-Field Infrared Survey Telescope SN survey observing strategy, we forecast optimistic future constraints on the expansion rate from SNe Ia.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f61a707610d6705bf758f8376131ca55db2c329f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample (2017, methodology): “This is likely due to the sample size and this parameterization of dark energy, which assumes that w(z) is constant; this is discussed in detail in Riess et al. (2018), which uses the Pantheon sample and varies the parameterization of dark energy.”
Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory (2020, background): “…SNe Ia observed at low redshift (Riess et al. 1999; Jha et al. 2006; Hicken et al. 2009; Contreras et al. 2010; Folatelli et al. 2010; Stritzinger et al. 2011), the SDSS and SNLS samples, and with HST (Suzuki et al. 2012; Riess et al. 2007; Rodney et al. 2014; Graur et al. 2014; Riess et al. 2018).”
The Pantheon+ Analysis: Cosmological Constraints (2022, background): “…Digital Sky Survey (SDSS; Sako et al. 2011), Hubble Space Telescope (HST; Gilliland et al. 1999; Riess et al. 2001, 2004, 2007; Suzuki et al. 2012; Riess et al. 2018), and Low-z (grouped together as LOSS_11; Ganeshalingam et al. 2010; LOSS_21; Stahl et al. 2019; SOUSA135; Brown et al. 2014; CNIa0.”