A cosmology-independent calibration of Type Ia supernovae data
| Autor: | Clémentine Hauret, Pierre Magain, Judith Biernaux |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Absolute magnitude
Physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) Dependency (UML) 010308 nuclear & particles physics Cosmic distance ladder FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Type (model theory) 01 natural sciences Cosmology Galaxy Supernova Space and Planetary Science 0103 physical sciences Calibration Astrophysics - Instrumentation and Methods for Astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 479:3996-4003 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/sty1715 |
| Popis: | Recently, the common methodology used to transform type Ia supernovae (SNe Ia) into genuine standard candles has been suffering criticism. Indeed, it assumes a particular cosmological model (namely the flat $\Lambda$CDM) to calibrate the standardisation corrections parameters, i.e. the dependency of the supernova peak absolute magnitude on its colour, post-maximum decline rate and host galaxy mass. As a result, this assumption could make the data compliant to the assumed cosmology and thus nullify all works previously conducted on model comparison. In this work, we verify the viability of these hypotheses by developing a cosmology-independent approach to standardise SNe Ia data from the recent JLA compilation. Our resulting corrections turn out to be very close to the $\Lambda$CDM-based corrections. Therefore, even if a $\Lambda$CDM-based calibration is questionable from a theoretical point of view, the potential compliance of SNe Ia data does not happen in practice for the JLA compilation. Previous works of model comparison based on these data do not have to be called into question. However, as this cosmology-independent standardisation method has the same degree of complexity than the model-dependent one, it is worth using it in future works, especially if smaller samples are considered, such as the superluminous type Ic supernovae. Comment: 9 pages, 3 figures, Accepted in MNRAS |
| Databáze: | OpenAIRE |
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