History of Supernovae as Distance Indicators

Leibundgut, B.

doi:10.1007/978-3-319-20794-0_99-1

Cited by 3 publications

(2 citation statements)

References 141 publications

(124 reference statements)

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“…Supernova distances on their own are not absolute distances because of the unknown intrinsic luminosity of SNe (e.g. Leibundgut 2017). Nonetheless, SNe map out the expansion history of the Universe very precisely, and by anchoring their distance scale with absolute distance measurements, cosmological-model-insensitive absolute distance determinations become feasible.…”

Section: Introductionmentioning

confidence: 99%

The Hubble constant determined through an inverse distance ladder including quasar time delays and Type Ia supernovae

Taubenberger

Suyu

Komatsu

et al. 2019

A&A

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Context. The precise determination of the present-day expansion rate of the Universe, expressed through the Hubble constant H 0 , is one of the most pressing challenges in modern cosmology. Assuming flat ΛCDM, H 0 inference at high redshift using cosmic microwave background data from Planck disagrees at the 4.4σ level with measurements based on the local distance ladder made up of parallaxes, Cepheids, and Type Ia supernovae (SNe Ia), often referred to as Hubble tension. Independent cosmological-modelinsensitive ways to infer H 0 are of critical importance. Aims. We apply an inverse distance ladder approach, combining strong-lensing time-delay distance measurements with SN Ia data. By themselves, SNe Ia are merely good indicators of relative distance, but by anchoring them to strong gravitational lenses we can obtain an H 0 measurement that is relatively insensitive to other cosmological parameters. Methods. A cosmological parameter estimate was performed for different cosmological background models, both for strong-lensing data alone and for the combined lensing + SNe Ia data sets. Results. The cosmological-model dependence of strong-lensing H 0 measurements is significantly mitigated through the inverse distance ladder. In combination with SN Ia data, the inferred H 0 consistently lies around 73-74 km s −1 Mpc −1 , regardless of the assumed cosmological background model. Our results agree closely with those from the local distance ladder, but there is a >2σ tension with Planck results, and a ∼1.5σ discrepancy with results from an inverse distance ladder including Planck, Baryon Acoustic Oscillations, and SNe Ia. Future strong-lensing distance measurements will reduce the uncertainties in H 0 from our inverse distance ladder.

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Section: Introductionmentioning

confidence: 99%

The Hubble constant determined through an inverse distance ladder including quasar time delays and Type Ia supernovae

Taubenberger

Suyu

Komatsu

et al. 2019

A&A

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“…Three distinct phases of SN Ia surveys can be discerned. The first, the early SN searches, were essentially trying to find as many SNe as possible, and establish them as good distance indicators (see Leibundgut 2016, for a historical account). During the 1980s and 1990s SNe Ia were mostly used to measure an accurate value of the Hubble constant (most notably the Calán/Tololo survey; Hamuy et al 1996).…”

Section: Current Surveysmentioning

confidence: 99%

Type Ia Supernova Cosmology

Leibundgut

Sullivan

2018

Space Sci Rev

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The primary agent for Type Ia supernova cosmology is the uniformity of their appearance. We present the current status, achievements and uncertainties. The Hubble constant and the expansion history of the universe are key measurements provided by Type Ia supernovae. They were also instrumental in showing time dilation, which is an direct observational signature of an expansion. Connections to explosion physics are made in the context of potential improvements of the quality of Type Ia supernovae as distance indicators. The coming years will see large efforts to use Type Ia supernovae to characterise dark energy.

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