dc.creator | Contreras, Carlos | |
dc.creator | Phillips, M. M. | |
dc.creator | Burns, Christopher R. | |
dc.creator | Piro, Anthony L. | |
dc.creator | Shappee, B. J. | |
dc.creator | Stritzinger, Maximilian D. | |
dc.creator | Baltay, C. | |
dc.creator | Brown, Peter J. | |
dc.creator | Conseil, Emmanuel | |
dc.creator | Klotz, Alain | |
dc.creator | Nugent, Peter E. | |
dc.creator | Turpin, Damien | |
dc.creator | Parker, Stu | |
dc.creator | Rabinowitz, D. | |
dc.creator | Hsiao, Eric Y. | |
dc.creator | Morrell, Nidia Irene | |
dc.creator | Campillay, Abdo | |
dc.creator | Castellón, Sergio | |
dc.creator | Corco, Carlos | |
dc.creator | González, Consuelo | |
dc.creator | Krisciunas, Kevin | |
dc.creator | Serón, Jacqueline | |
dc.creator | Tucker, Brad E. | |
dc.creator | Walker, E. S. | |
dc.creator | Baron, E. | |
dc.creator | Cain, C. | |
dc.creator | Childress, Michael J. | |
dc.creator | Folatelli, Gastón | |
dc.creator | Freedman, Wendy L. | |
dc.creator | Hamuy, Mario | |
dc.creator | Hoeflich, P. | |
dc.creator | Persson, S. E. | |
dc.creator | Scalzo, Richard | |
dc.creator | Schmidt, Brian | |
dc.creator | Suntzeff, Nicholas B. | |
dc.date | 2018-05 | |
dc.date | 2020-04-21T17:15:07Z | |
dc.date.accessioned | 2023-07-14T19:18:42Z | |
dc.date.available | 2023-07-14T19:18:42Z | |
dc.identifier | http://sedici.unlp.edu.ar/handle/10915/93906 | |
dc.identifier | https://iopscience.iop.org/article/10.3847/1538-4357/aabaf8 | |
dc.identifier | https://ri.conicet.gov.ar/handle/11336/82486 | |
dc.identifier | issn:0004-637X | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7434813 | |
dc.description | We present detailed ultraviolet, optical, and near-infrared light curves of the Type Ia supernova (SN) 2012fr, which exploded in the Fornax cluster member NGC 1365. These precise high-cadence light curves provide a dense coverage of the flux evolution from −12 to +140 days with respect to the epoch of B-band maximum (t<SUB>B<sub>max</sub></SUB>). Supplementary imaging at the earliest epochs reveals an initial slow and nearly linear rise in luminosity with a duration of ∼2.5 days, followed by a faster rising phase that is well reproduced by an explosion model with a moderate amount of <sup>56</sup>Ni mixing in the ejecta. From our analysis of the light curves, we conclude that: (i) the explosion occurred <22 hr before the first detection of the supernova, (ii) the rise time to peak bolometric (λ > 1800 Å) luminosity was 16.5 ± 0.6 days, (iii) the supernova suffered little or no host-galaxy dust reddening, (iv) the peak luminosity in both the optical and near-infrared was consistent with the bright end of normal Type Ia diversity, and (v) 0.60 ± 0.15 M⊙ of <sup>56</sup>Ni was synthesized in the explosion. Despite its normal luminosity, SN 2012fr displayed unusually prevalent high-velocity Ca II and Si II absorption features, and a nearly constant photospheric velocity of the Si II λ6355 line at ∼12,000 km s<sup>-1</sup> that began ∼5 days before t<SUB>B<sub>max</sub></SUB>. We also highlight some of the other peculiarities in the early phase photometry and the spectral evolution. SN 2012fr also adds to a growing number of Type Ia supernovae that are hosted by galaxies with direct Cepheid distance measurements. | |
dc.description | Facultad de Ciencias Astronómicas y Geofísicas | |
dc.description | Instituto de Astrofísica de La Plata | |
dc.format | application/pdf | |
dc.language | en | |
dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
dc.subject | Astronomía | |
dc.subject | supernovae: general | |
dc.subject | supernovae: individual (SN 2012fr) | |
dc.title | SN 2012fr: Ultraviolet, Optical, and Near-infrared Light Curves of a Type Ia Supernova Observed within a Day of Explosion | |
dc.type | Articulo | |
dc.type | Articulo | |