Intrinsic and extinction colour components in SNeIa and the determination of $R_V$
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866911775960596480 |
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| author | Smadja, G. Copin, Y. Hillebrandt, W. Saunders, C. Tao, C. |
| author_facet | Smadja, G. Copin, Y. Hillebrandt, W. Saunders, C. Tao, C. |
| contents | The key ingredients in this attempt at separating for each supernova the intrinsic and extinction colour components, and then measuring Rv , are the assumptions of a linearized dependence of magnitudes on the extinction component of colour, a one-dimensional extra-intrinsic colour space (in addition to CaII H&K $λ$3945 and Si II $λ$4131 contributions, and the absence of correlations between intrinsic and extrinsic variabilities. A consistent solution is found under the previous assumptions, but the observed systematic trends point to a small inadequacy of the extinction formula. Once corrected, all systematic extinction effects can be cancelled by choosing a single scaling of the extinction colour component as well as the appropriate value of Rv = 2.181 $\pm$ 0.117 |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2309_08215 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Intrinsic and extinction colour components in SNeIa and the determination of $R_V$ Smadja, G. Copin, Y. Hillebrandt, W. Saunders, C. Tao, C. Solar and Stellar Astrophysics Cosmology and Nongalactic Astrophysics The key ingredients in this attempt at separating for each supernova the intrinsic and extinction colour components, and then measuring Rv , are the assumptions of a linearized dependence of magnitudes on the extinction component of colour, a one-dimensional extra-intrinsic colour space (in addition to CaII H&K $λ$3945 and Si II $λ$4131 contributions, and the absence of correlations between intrinsic and extrinsic variabilities. A consistent solution is found under the previous assumptions, but the observed systematic trends point to a small inadequacy of the extinction formula. Once corrected, all systematic extinction effects can be cancelled by choosing a single scaling of the extinction colour component as well as the appropriate value of Rv = 2.181 $\pm$ 0.117 |
| title | Intrinsic and extinction colour components in SNeIa and the determination of $R_V$ |
| topic | Solar and Stellar Astrophysics Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2309.08215 |