Confirming the CSM-interacting nature of PTF11qcj with VLBI direct size measurements of the supernova ejecta
Abstract
We present High Sensitivity Array (HSA) and enhanced Multi Element Remotely Linked Interferometer Network (eMERLIN) data of PTF11qcj, a broad-lined (BL) Ic supernova (SN) which shows late-time rebrightening, obtained ~7.5 years after the explosion. In Palliyaguru et al. 2019 we presented VLA data which showed the second peak at ~5.5 years post explosion, a detection in the X-rays, and the non-detection of broad H-alpha. These results and radio modeling indicated that the second peak could be due to SN ejecta interacting with the circumstellar medium (CSM) or due to an off-axis jet, decelerating and entering into our line of sight. We detected PTF11qcj at 1.5 GHz, 5 GHz, and 16 GHz with HSA and eMERLIN, improving the astrometry with respect to the optical position.The latest data shows that the SN is not resolved at these frequencies and therefore indicate non-relativistic expansion.
- Publication:
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American Astronomical Society Meeting Abstracts #235
- Pub Date:
- January 2020
- Bibcode:
- 2020AAS...23527615P