Inverse compton X-ray emission from supernovae with compact progenitors: Application to SN2011fe

R. Margutti, A. M. Soderberg, L. Chomiuk, R. Chevalier, K. Hurley, D. Milisavljevic, R. J. Foley, J. P. Hughes, P. Slane, C. Fransson, M. Moe, S. Barthelmy, W. Boynton, M. Briggs, V. Connaughton, E. Costa, J. Cummings, E. Del Monte, H. Enos, C. FellowsM. Feroci, Y. Fukazawa, N. Gehrels, J. Goldsten, D. Golovin, Y. Hanabata, K. Harshman, H. Krimm, M. L. Litvak, K. Makishima, M. Marisaldi, I. G. Mitrofanov, T. Murakami, M. Ohno, D. M. Palmer, A. B. Sanin, R. Starr, D. Svinkin, T. Takahashi, M. Tashiro, Y. Terada, K. Yamaoka

Research output: Contribution to journalArticlepeer-review


We present a generalized analytic formalism for the inverse Compton X-ray emission from hydrogen-poor supernovae and apply this framework to SN2011fe using Swift X-Ray Telescope (XRT), UVOT, and Chandra observations. We characterize the optical properties of SN2011fe in the Swift bands and find them to be broadly consistent with a "normal" SN Ia, however, no X-ray source is detected by either XRT or Chandra. We constrain the progenitor system mass-loss rate (3σ c.l.) for wind velocity vw = 100 km s -1. Our result rules out symbiotic binary progenitors for SN 2011fe and argues against Roche lobe overflowing subgiants and main-sequence secondary stars if ≳ 1% of the transferred mass is lost at the Lagrangian points. Regardless of the density profile, the X-ray non-detections are suggestive of a clean environment (n CSM < 150 cm-3) for 2 × 1015 ≲ R ≲ 5 × 1016 cm around the progenitor site. This is either consistent with the bulk of material being confined within the binary system or with a significant delay between mass loss and supernova explosion. We furthermore combine X-ray and radio limits from Chomiuk et al. to constrain the post-shock energy density in magnetic fields. Finally, we searched for the shock breakout pulse using gamma-ray observations from the Interplanetary Network and find no compelling evidence for a supernova-associated burst. Based on the compact radius of the progenitor star we estimate that the shock breakout pulse was likely not detectable by current satellites.

Original languageEnglish (US)
Article number134
JournalAstrophysical Journal
Issue number2
StatePublished - Jun 1 2012
Externally publishedYes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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