A new method infers inhomogeneities and asymmetries in high-energy transients from their radio synchrotron self-absorption spectra and demonstrates it on SN 2016coi and AT2018cow.
Type Ib supernova Master OT J120451.50+265946.6: radio emitting shock with inhomogeneities crossing through a dense shell
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abstract
We present radio observations of a Type Ib supernova (SN) Master OT J120451.50+265946.6. Our low frequency Giant Metrewave Radio Telescope (GMRT) data taken when the SN was in the optically thick phase for observed frequencies reveal inhomogeneities in the structure of the radio emitting region. The high frequency Karl G. Jansky Very Large Array data indicate that the shock is crossing through a dense shell between $\sim$ 47 to $\sim 87$ days. The data $\ge 100$ days onwards are reasonably well fit with the inhomogeneous synchrotron-self absorption model. Our model predicts that the inhomogeneities should smooth out at late times. Low frequency GMRT observations at late epochs will test this prediction. Our findings suggest the importance of obtaining well-sampled wide band radio data in order to understand the intricate nature of the radio emission from young supernovae.
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astro-ph.HE 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
This review chapter updates prior work to outline the SKA's expected role in turning radio observations of supernovae into population statistics through wide-field surveys and targeted follow-up.
citing papers explorer
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Constraining inhomogeneities and asymmetries in SNe, FBOTs, and other high-energy transients from unresolved radio observations
A new method infers inhomogeneities and asymmetries in high-energy transients from their radio synchrotron self-absorption spectra and demonstrates it on SN 2016coi and AT2018cow.
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Supernovae with the Square Kilometre Array
This review chapter updates prior work to outline the SKA's expected role in turning radio observations of supernovae into population statistics through wide-field surveys and targeted follow-up.