dc.date.accessioned | 2019-12-18T18:15:30Z | |
dc.date.accessioned | 2022-10-18T22:36:34Z | |
dc.date.available | 2019-12-18T18:15:30Z | |
dc.date.available | 2022-10-18T22:36:34Z | |
dc.date.created | 2019-12-18T18:15:30Z | |
dc.date.issued | 2011 | |
dc.identifier | http://hdl.handle.net/10533/237449 | |
dc.identifier | 15010003 | |
dc.identifier | WOS:000290819900066 | |
dc.identifier | eid=2-s2.0-79956223719 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4468787 | |
dc.description.abstract | Phenomenological relations exist between the peak luminosity and other observables of type Ia supernovae (SNe~Ia), that allow one to standardize their peak luminosities. However, several issues are yet to be clarified: SNe~Ia show color variations after the standardization. Also, individual SNe~Ia can show residuals in their standardized peak absolute magnitude at the level of ∼0.15 mag. In this paper, we explore how the color and luminosity residual are related to the wavelength shift of nebular emission lines observed at $\gsim 150$ days after maximum light. A sample of 11 SNe Ia which likely suffer from little host extinction indicates a correlation (3.3σ) between the peak B−V color and the late-time emission-line shift. Furthermore, a nearly identical relation applies for a larger sample in which only three SNe with $B-V \gsim 0.2$ mag are excluded. Following the interpretation that the late-time emission-line shift is a tracer of the viewing direction from which an off-centre explosion is observed, we suggest that the viewing direction is a dominant factor controlling the SN color and that a large part of the color variations is intrinsic, rather than due to the host extinction. We also investigate a relation between the peak luminosity residuals and the wavelength shift in nebular emission lines in a sample of 20 SNe. We thereby found a hint of a correlation (at ∼1.6σ level). The confirmation of this will require a future sample of SNe with more accurate distance estimates. Radiation transfer simulations for a toy explosion model where different viewing angles cause the late-time emission-line shift are presented, predicting a strong correlation between the color and shift, and a weaker one for the luminosity residual. | |
dc.language | eng | |
dc.relation | https://arxiv.org/abs/1101.3935 | |
dc.relation | 10.1111/j.1365-2966.2011.18381.x | |
dc.relation | info:eu-repo/grantAgreement/Fondap/15010003 | |
dc.relation | instname: Conicyt | |
dc.relation | reponame: Repositorio Digital RI2.0 | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Chile | |
dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | |
dc.title | Effects of the explosion asymmetry and viewing angle on the Type Ia supernova colour and luminosity calibration | |
dc.type | Articulo | |