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Scalable hierarchic...
Scalable hierarchical BayeSN inference : investigating dependence of SN Ia host galaxy dust properties on stellar mass and redshift
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Grayling, Matthew (författare)
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- Thorp, Stephen, 1996- (författare)
- Stockholms universitet,Oskar Klein-centrum för kosmopartikelfysik (OKC),Fysikum
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Mandel, Kaisey S. (författare)
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Dhawan, Suhail (författare)
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Uzsoy, Ana Sofia M. (författare)
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Boyd, Benjamin M. (författare)
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Hayes, Erin E. (författare)
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Ward, Sam M. (författare)
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Monthly notices of the Royal Astronomical Society. - 0035-8711 .- 1365-2966. ; 531:1, s. 953-976
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We apply the hierarchical probabilistic spectral energy distribution (SED) model BAYESN to analyse a sample of 475 type Ia supernovae (0.015 < z < 0.4) from Foundation, DES3YR and PS1MD to investigate the properties of dust in their host galaxies. We jointly infer the dust law RV population distributions at the SED level in high- and low-mass galaxies simultaneously with dust-independent, intrinsic differences. We find an intrinsic mass step of −0.049 ± 0.016 mag, at a significance of 3.1σ, when allowing for a constant intrinsic, achromatic magnitude offset. We additionally apply a model allowing for time- and wavelength-dependent intrinsic differences between SNe Ia in different mass bins, finding ∼2σ differences in magnitude and colour around peak and 4.5σ differences at later times. These intrinsic differences are inferred simultaneously with a difference in population mean RV of ∼2σ significance, demonstrating that both intrinsic and extrinsic differences may play a role in causing the host galaxy mass step. We also consider a model which allows the mean of the RV distribution to linearly evolve with redshift but find no evidence for any evolution – we infer the gradient of this relation ηR = −0.38 ± 0.70. In addition, we discuss in brief a new, GPU-accelerated PYTHON implementation of BAYESN suitable for application to large surveys which is publicly available and can be used for future cosmological analyses; this code can be found here: https://github.com/bayesn/bayesn.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- methods: statistical
- supernovae: general
- dust
- extinction
- distance scale
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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