| Title: |
VLBI observations of supernova PTF11qcj: Direct constraints on the size of the radio ejecta |
| Authors: |
Palliyaguru, N. T., Corsi, A., Pérez-Torres, M., Varenius, E., Van Eerten, H. |
| Publication Year: |
2020 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics |
| More Details: |
We present High Sensitivity Array (HSA) and enhanced Multi Element Remotely Linked Interferometer Network (eMERLIN) observations of the radio-loud broad-lined type Ic supernova PTF11qcj obtained $\sim7.5$ years after the explosion. Previous observations of this supernova at 5.5 yrs since explosion showed a double-peaked radio light curve accompanied by a detection in the X-rays, but no evidence for broad H$\alpha$ spectral features. The Very Long Baseline Interferometry (VLBI) observations presented here show that the PTF11qcj GHz radio ejecta remains marginally resolved at the sub-milliarcsecond level at $\approx 7.5$ yrs after the explosion, pointing toward a non-relativistic expansion. Our VLBI observations thus favor a scenario in which the second peak of the PTF11qcj radio light curve is related to strong interaction of the supernova ejecta with a circumstellar medium of variable density, rather than to the emergence of an off-axis jet. Continued VLBI monitoring of PTF11qcj in the radio may strengthen further this conclusion.
Comment: Submitted to ApJ, 8 pages, 4 figures |
| Document Type: |
Working Paper |
| DOI: |
10.3847/1538-4357/abe1c9 |
| Access URL: |
http://arxiv.org/abs/2101.00128 |
| Accession Number: |
edsarx.2101.00128 |
| Database: |
arXiv |
