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Super Luminous Ic Supernovae: catching a magnetar by the tail
- Source :
- The Astrophysical Journal, Astrophysical journal, 2013, Vol.770(2), pp.128 [Peer Reviewed Journal]
- Publication Year :
- 2013
- Publisher :
- arXiv, 2013.
-
Abstract
- We report extensive observational data for five of the lowest redshift Super-Luminous Type Ic Supernovae (SL-SNe Ic) discovered to date, namely PTF10hgi, SN2011ke, PTF11rks, SN2011kf and SN2012il. Photometric imaging of the transients at +50 to +230 days after peak combined with host galaxy subtraction reveals a luminous tail phase for four of these SL-SNe. A high resolution, optical and near infrared spectrum from xshooter provides detection of a broad He I $\lambda$10830 emission line in the spectrum (+50d) of SN2012il, revealing that at least some SL-SNe Ic are not completely helium free. At first sight, the tail luminosity decline rates that we measure are consistent with the radioactive decay of \co, and would require 1-4M of \ni to produce the luminosity. These \ni masses cannot be made consistent with the short diffusion times at peak, and indeed are insufficient to power the peak luminosity. We instead favour energy deposition by newborn magnetars as the power source for these objects. A semi-analytical diffusion model with energy input from the spin-down of a magnetar reproduces the extensive lightcurve data well. The model predictions of ejecta velocities and temperatures which are required are in reasonable agreement with those determined from our observations. We derive magnetar energies of $0.4\lesssim E$($10^{51}$erg) $\lesssim6.9$ and ejecta masses of $2.3\lesssim M_{ej}$(\M) $\lesssim 8.6$. The sample of five SL-SNe Ic presented here, combined with SN 2010gx - the best sampled SL-SNe Ic so far - point toward an explosion driven by a magnetar as a viable explanation for all SL-SNe Ic.<br />Comment: 34 pages, 19 figures, accepted by ApJ. 1 figure added and some sections have been reorganised with respect to the previous version
- Subjects :
- Cosmology and Nongalactic Astrophysics (astro-ph.CO)
general [Supernovae]
FOS: Physical sciences
Astrophysics
Type (model theory)
Magnetar
01 natural sciences
7. Clean energy
Luminosity
magnetars [Stars]
Astronomi, astrofysik och kosmologi
0103 physical sciences
Astronomy, Astrophysics and Cosmology
PTF11rks
Emission spectrum
Ejecta
SN 2012il)
010303 astronomy & astrophysics
Physics
SN 2011ke
High Energy Astrophysical Phenomena (astro-ph.HE)
SN 2011kf
010308 nuclear & particles physics
individual (PTF10hgi [Supernovae]
Astronomy and Astrophysics
Galaxy
Redshift
Supernova
13. Climate action
Space and Planetary Science
Astrophysics - High Energy Astrophysical Phenomena
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- ISSN :
- 0004637X
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal, Astrophysical journal, 2013, Vol.770(2), pp.128 [Peer Reviewed Journal]
- Accession number :
- edsair.doi.dedup.....f5f5c982e0b69df7ed468f2d9ab5234d
- Full Text :
- https://doi.org/10.48550/arxiv.1304.3320