Discovery, progenitor and early evolution of a stripped envelope supernova iPTF13bvn
| Autor: | Yi Cao, Mansi M. Kasliwal, Iair Arcavi, Assaf Horesh, Paul Hancock, Stefano Valenti, S. Bradley Cenko, S. R. Kulkarni, Avishay Gal-Yam, Evgeny Gorbikov, Eran O. Ofek, David Sand, Ofer Yaron, Melissa Graham, Jeffrey M. Silverman, J. Craig Wheeler, G. H. Marion, Emma S. Walker, Paolo Mazzali, D. Andrew Howell, K. L. Li, A. K. H. Kong, Joshua S. Bloom, Peter E. Nugent, Jason Surace, Frank Masci, John Carpenter, Nathalie Degenaar, Christopher R. Gelino |
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| Rok vydání: | 2013 |
| Předmět: |
FOS: Physical sciences
Solar radius Astrophysics adaptive optics [instrumentation] Astronomy & Astrophysics 01 natural sciences Power law Luminosity Wolf–Rayet star surveys individual [supernovae] 0103 physical sciences 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) High Energy Astrophysical Phenomena (astro-ph.HE) Physics 010308 nuclear & particles physics Astronomy and Astrophysics Radius shock waves Stem Cell Research Light curve Galaxy Wolf-Rayet [stars] Supernova Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics - High Energy Astrophysical Phenomena Astronomical and Space Sciences |
| Zdroj: | Astrophysical Journal Letters, vol 775, iss 1 The Astrophysical Journal Letters, vol 775, iss 1 |
| Popis: | The intermediate Palomar Transient Factory reports our discovery of a young supernova, iPTF13bvn, in the nearby galaxy, NGC5806 (22.5Mpc). Our spectral sequence in the optical and infrared suggests a likely Type Ib classification. We identify a single, blue progenitor candidate in deep pre-explosion imaging within a 2{\sigma} error circle of 80 mas (8.7 pc). The candidate has a MB luminosity of -5.2 +/- 0.4 mag and a B-I color of 0.1+/-0.3 mag. If confirmed by future observations, this would be the first direct detection for a progenitor of a Type Ib. Fitting a power law to the early light curve, we find an extrapolated explosion date around 1.1 days before our first detection. We see no evidence of shock cooling. The pre-explosion detection limits constrain the radius of the progenitor to be smaller than a few solar radii. iPTF13bvn is also detected in cm and mm-wavelengths. Fitting a synchrotron self-absorption model to our radio data, we find a mass loading parameter of 1.3*10^12 g/cm. Assuming a wind velocity of 10^3km/s, we derive a progenitor mass loss rate of 3*10^-5Msun/yr. Our observations, taken as a whole, are consistent with a Wolf Rayet progenitor of the supernova iPTF13bvn. Comment: 18 pages, 5 figures |
| Databáze: | OpenAIRE |
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