2019/04/12 by Poonam Chandra, A. J. Nayana, C.-I. Björnsson +6
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Gamma-ray bursts and supernovae #Giant Metrewave Radio Telescope #Jansky #Pulsars and Gravitational Waves Research #Shell (structure) #Shock (circulatory) #Shock wave #Supernova #Supernova remnant #Synchrotron #astro-ph.HE
paper · pdf · doi:10.3847/1538-4357/ab1900
Accepted for publication in ApJ
arxiv created 2019/04/12 · openalex created_date 2019/04/25 · openalex publication_date 2019/05/28 · arxiv updated 2019/06/05 · openalex updated_date 2026/08/05
Abstract We present radio observations of 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 ∼47 and ∼87 days. The data ≥100 days onward 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.