Marginal evidence for cosmic acceleration from Type Ia supernovae
The ‘standard’ model of cosmology is founded on the basis that the expansion rate of the universe is accelerating at present — as was inferred originally from the Hubble diagram of Type Ia supernovae. There exists now a much bigger database of supernovae so we can perform rigorous statistical tests...
| Huvudupphovsmän: | , , |
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| Materialtyp: | Journal article |
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Nature Publishing Group
2016
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| _version_ | 1826273612863111168 |
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| author | Nielsen, J Guffanti, A Sarkar, S |
| author_facet | Nielsen, J Guffanti, A Sarkar, S |
| author_sort | Nielsen, J |
| collection | OXFORD |
| description | The ‘standard’ model of cosmology is founded on the basis that the expansion rate of the universe is accelerating at present — as was inferred originally from the Hubble diagram of Type Ia supernovae. There exists now a much bigger database of supernovae so we can perform rigorous statistical tests to check whether these ‘standardisable candles’ indeed indicate cosmic acceleration. Taking account of the empirical procedure by which corrections are made to their absolute magnitudes to allow for the varying shape of the light curve and extinction by dust, we find, rather surprisingly, that the data are still quite consistent with a constant rate of expansion. |
| first_indexed | 2024-03-06T22:30:51Z |
| format | Journal article |
| id | oxford-uuid:5838e424-e10c-4b6e-b47c-c42119dcb01e |
| institution | University of Oxford |
| last_indexed | 2024-03-06T22:30:51Z |
| publishDate | 2016 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | oxford-uuid:5838e424-e10c-4b6e-b47c-c42119dcb01e2022-03-26T17:01:55ZMarginal evidence for cosmic acceleration from Type Ia supernovaeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5838e424-e10c-4b6e-b47c-c42119dcb01eSymplectic Elements at OxfordNature Publishing Group2016Nielsen, JGuffanti, ASarkar, SThe ‘standard’ model of cosmology is founded on the basis that the expansion rate of the universe is accelerating at present — as was inferred originally from the Hubble diagram of Type Ia supernovae. There exists now a much bigger database of supernovae so we can perform rigorous statistical tests to check whether these ‘standardisable candles’ indeed indicate cosmic acceleration. Taking account of the empirical procedure by which corrections are made to their absolute magnitudes to allow for the varying shape of the light curve and extinction by dust, we find, rather surprisingly, that the data are still quite consistent with a constant rate of expansion. |
| spellingShingle | Nielsen, J Guffanti, A Sarkar, S Marginal evidence for cosmic acceleration from Type Ia supernovae |
| title | Marginal evidence for cosmic acceleration from Type Ia supernovae |
| title_full | Marginal evidence for cosmic acceleration from Type Ia supernovae |
| title_fullStr | Marginal evidence for cosmic acceleration from Type Ia supernovae |
| title_full_unstemmed | Marginal evidence for cosmic acceleration from Type Ia supernovae |
| title_short | Marginal evidence for cosmic acceleration from Type Ia supernovae |
| title_sort | marginal evidence for cosmic acceleration from type ia supernovae |
| work_keys_str_mv | AT nielsenj marginalevidenceforcosmicaccelerationfromtypeiasupernovae AT guffantia marginalevidenceforcosmicaccelerationfromtypeiasupernovae AT sarkars marginalevidenceforcosmicaccelerationfromtypeiasupernovae |