Project description
Cutting-edge method to studying how host galaxies influence type Ia supernovae
Type Ia supernovae (SNe Ia) are vital tools for measuring astronomical distances and understanding dark energy. Yet, their reliability as standardisable candles is challenged by uncertainties related to their host galaxies. Factors including dust content and galaxy properties significantly affect SNe Ia brightness, creating systematic errors in cosmological studies. With the support of the Marie Skłodowska-Curie Actions programme, the DAWNS project will use a new data set of 3 000 SNe Ia and their host galaxies. By combining global galaxy measurements with hyper-local data from integral field spectroscopy, DAWNS will uncover how host environments influence SNe Ia. The proposed study will refine cosmological models and improve understanding of galaxy evolution, enhancing future surveys such as Rubin/LSST.
Objective
Type Ia Supernovae (SNe Ia) remain unparalleled probes of astronomical distances and provide crucial constraints when measuring the properties of dark energy. But recent cosmological analyses with SNe Ia have pushed the boundaries of our physical understanding of these standardisable candles. The largest source of cosmological systematic uncertainty for SNe Ia is the impact of astrophysical effects from both extrinsic host galaxy properties (such as dust content) and the intrinsic effects of the SN. Without better understanding how SNe Ia interact with, and are co-dependent on, their host environment, the key cosmology programs of future surveys, such as the legacy survey of space and time (LSST) from the Rubin Observatory, will not reach their goals.
My MCSA Fellowship will make use of a new high-quality sample of 3,000 SNe Ia and their hosts taken from the Zwicky Transient Facility (ZTF) and the internationally-recognised expertise of the host, the University of Southampton. I will use this as a basis to better understand SNe Ia for use in cosmology and in astrophysics. I will create a catalogue of the host galaxies with high-quality measurements across the electromagnetic spectrum, providing global and local measurements of galaxy properties to probe how they impact SNe Ia. Then, I will use integral field spectroscopy of local SN hosts to provide hyper-local measurements at the site of the SN Ia explosion, augmenting the statistics of the host galaxy catalogue with in-depth measurements. These two work packages will then be combined to assess the impact of these host galaxy effects on cosmology, determining which galaxy evolution processes drive the observed correlations of SN Ia brightness, and the ideal tracer to use for the high-statistics cosmology analyses of Rubin/LSST. This final work package will also shed light on how SNe Ia may be used as a probabilistic tracer for host galaxy evolution, providing a new and independent tool for use in astronomy.
Fields of science (EuroSciVoc)
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CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences physical sciences astronomy astrophysics
- natural sciences physical sciences astronomy physical cosmology
- natural sciences physical sciences optics spectroscopy
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
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(opens in new window) HORIZON-MSCA-2024-PF-01
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
SO17 1BJ SOUTHAMPTON
United Kingdom
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