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Title: DISCOVERY, PROGENITOR AND EARLY EVOLUTION OF A STRIPPED ENVELOPE SUPERNOVA iPTF13bvn

The intermediate Palomar Transient Factory reports our discovery of a young supernova, iPTF13bvn, in the nearby galaxy, NGC 5806 (22.5 Mpc). Our spectral sequence in the optical and infrared suggests a Type Ib classification. We identify a blue progenitor candidate in deep pre-explosion imaging within a 2σ error circle of 80 mas (8.7 pc). The candidate has an M{sub B} luminosity of –5.52 ± 0.39 mag and a B – I color of 0.25 ± 0.25 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 0.6 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 centimeter and millimeter wavelengths. Fitting a synchrotron self-absorption model to our radio data, we find a mass-loading parameter of 1.3×10{sup 12} g cm{sup –1}. Assuming a wind velocity of 10{sup 3} km s{sup –1}, we derive a progenitor mass-loss rate of 3 × 10{sup –5} M {sub ☉} yr{sup –1}. Our observations,more » taken as a whole, are consistent with a Wolf-Rayet progenitor of the supernova iPTF13bvn.« less
Authors:
; ;  [1] ;  [2] ; ; ; ; ;  [3] ;  [4] ; ; ;  [5] ;  [6] ;  [7] ; ; ;  [8] ;  [9] ;  [10] more »; « less
  1. Astronomy Department, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125 (United States)
  2. The Observatories, Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101 (United States)
  3. Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100 (Israel)
  4. Sydney Institute for Astronomy (SIfA), School of Physics, The University of Sydney, NSW 2006 (Australia)
  5. Las Cumbres Observatory Global Telescope Network, Goleta, CA 93117 (United States)
  6. Astrophysics Science Division, NASA Goddard Space Flight Center, Mail Code 661, Greenbelt, MD 20771 (United States)
  7. Department of Physics, Texas Tech University, Lubbock, TX 79409 (United States)
  8. Department of Astronomy, University of Texas at Austin, Austin, TX 78712 (United States)
  9. Department of Physics, Yale University, New Haven, CT 06511-8499 (United States)
  10. INAF-Padova Astronomical Observatory, Vicolo dell'Osservatorio 5, I-35122 Padova (Italy)
Publication Date:
OSTI Identifier:
22215461
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 775; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COLOR; DETECTION; EXPLOSIONS; LUMINOSITY; SELF-ABSORPTION; STELLAR WINDS; SUPERNOVAE