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Type Ib Supernova Master OT J120451.50+265946.6: Radio-emitting Shock with Inhomogeneities Crossing through a Dense Shell
Stockholm University, Faculty of Science, Department of Astronomy. Tata Institute of Fundamental Research, India.ORCID iD: 0000-0002-0844-6563
Stockholm University, Faculty of Science, Department of Astronomy.
Stockholm University, Faculty of Science, Department of Astronomy.
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Number of Authors: 72019 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 877, no 2, article id 79Article in journal (Refereed) Published
Abstract [en]

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 similar to 47 and similar to 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.

Place, publisher, year, edition, pages
2019. Vol. 877, no 2, article id 79
Keywords [en]
circumstellar matter, radiation mechanisms: non-thermal, radio continuum: general, supernovae: general, supernovae: individual (Master OT J120451.50+265946.6)
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-170108DOI: 10.3847/1538-4357/ab1900ISI: 000469433800015OAI: oai:DiVA.org:su-170108DiVA, id: diva2:1334331
Available from: 2019-07-02 Created: 2019-07-02 Last updated: 2019-07-02Bibliographically approved

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