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Mapping the cosmic expansion history with Type Ia supernovae

Observations of distant Type Ia supernovae indicate that the expansion of the universe is accelerating, driven by a mysterious cosmic component called dark energy. Since the discovery, a standard model of cosmology has been establ... ver más

31/08/2023

THE CHANCELLOR MAS...

213K€

Presupuesto del proyecto: 213K€

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THE CHANCELLOR MASTERS AND SCHOLARS OF THE UN... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2023-08-31

MSCA-IF-2019: Individual Fellowships

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Duración del proyecto: 41 meses Fecha Inicio: 2020-03-26
Fecha Fin: 2023-08-31

Líder del proyecto

THE CHANCELLOR MASTERS AND SCHOLARS OF THE UN... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 213K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Observations of distant Type Ia supernovae indicate that the expansion of the universe is accelerating, driven by a mysterious cosmic component called dark energy. Since the discovery, a standard model of cosmology has been established, wherein ordinary matter only consists of 5% of the energy density, the rest being dark matter (~25%) and dark energy (~70%). Recent, precision measurements of the local expansion rate, the Hubble constant, are in disagreement with the value inferred from the early universe, presenting the strongest challenge to standard cosmology. In this proposal, I will, for the first time, use gravitationally lensed Type Ia supernovae to measure the Hubble constant. Strongly lensed Type Ia supernovae are powerful probes of cosmology since the delay time between their multiple images directly measures the Hubble constant. Wide-field transient surveys like the Zwicky Transient Facility are designed to find tens of such events and hence, it is extremely timely to use them as precision probes in cosmology. Moreover, I will use the Hubble diagram of unlensed Type Ia supernovae in the near infrared to understand the nature of dark energy. Supernova cosmology in the conventional optical wavelengths is limited by systematic uncertainties. Hence, the near infrared is an exciting wavelength regime to improve them as cosmological probes. Type Ia supernovae are more uniform in the near infrared than the optical and there is significantly less extinction from host galaxy dust. Additionally, I will quantify the constraints on dark energy from future experiment, e.g. the Large Synoptic Survey Telescope.

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