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Mapping the diversity of Type Ia supernovae explosions

Project description

Understanding the origins of diverse Type Ia supernovae samples

Understanding space phenomena significantly enhances our knowledge of our solar system and the formation of our planet and species. Stars and their life cycles are critical in this regard, as they contribute to the chemical enrichment of our galaxy. Type Ia supernovae (SNe Ia), which occur when accreting white dwarfs in binaries explode, are essential in these processes. Research has identified a variety of white dwarf explosions, each with unique spectral properties, luminosities, and light-curve timescales. With the support of the Marie Skłodowska-Curie Actions programme, the SN-DIVE project will detect and resolve the origins of such SNe Ia using a state-of-the-art Zwicky Transient Facility (ZTF) to compile, characterise and determine samples.

Objective

"Type Ia supernovae (SNe Ia) are the explosive luminous deaths of accreting white dwarfs (WD) in binaries. They play a vital role in chemical enrichment, galaxy feedback, and were instrumental in the discovery of dark energy, as our most mature cosmological probe. However, next to these ""normal"" and cosmologically useful SNe Ia, a surprising diversity in WD explosions has been revealed, with a much wider-than-expected range in luminosities, light-curve timescales and spectral properties. These ""peculiar"" events indicate that there are multiple ways a WD can explode and contaminate pure cosmological SNe Ia samples. A promising path to relate these peculiar explosions with the numerous proposed theoretical models is by investigating their host galaxies and estimating the ages of their underlying stellar systems, as different progenitor scenarios involve different timescales that control the production rate of these events. The aim of this action is to outline the variety and resolve the origins of these extreme SNe Ia. I will use the current state-of-the-art ""discovery transient machine"", the Zwicky Transient Facility (ZTF), to compile the largest homogeneous sample of peculiar SNe Ia, characterise their population properties and host galaxy parameters, determine the ages of their progenitors and link them to theoretical progenitor channels. By the end of this action, I will provide a detailed map of the SNe Ia diversity that will help decontaminate next-generation cosmological experiments, such as the Legacy Survey of Space and Time (LSST), and offer a significant advancement in understanding how a WD explodes."

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Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2024-PF-01

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Coordinator

UNIVERSITY OF LANCASTER
Net EU contribution
€ 260 347,92
Address
BAILRIGG
LA1 4YW LANCASTER
United Kingdom
Region
North West (England) Lancashire Lancaster and Wyre
Activity type
Higher or Secondary Education Establishments
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Total cost
No data