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New radio observations of the Type IIn Supernova 1978K

Published online by Cambridge University Press:  28 July 2017

Stuart D. Ryder Open the ORCID record for Stuart D. Ryder [Opens in a new window] ,
Erik C. Kool  and
Rubina Kotak
Stuart D. Ryder
Affiliation:
Australian Astronomical Observatory, Sydney NSW 1670, Australia email: sdr@aao.gov.au
Erik C. Kool
Affiliation:
Australian Astronomical Observatory, Sydney NSW 1670, Australia email: sdr@aao.gov.au Dept. of Physics & Astronomy, Macquarie University, Sydney NSW 2109, Australia
Rubina Kotak
Affiliation:
Astrophysics Research Centre, Queens University Belfast, United Kingdom
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Abstract

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SN 1978K is the oldest-known Type IIn supernova, and one of the closest. We report new radio observations at high frequency and spatial resolution. SN 1978K has been detected at 34 and 94 GHz with the Australia Telescope Compact Array, while Very Long Baseline Interferometry at 8.4 GHz has allowed us to derive the past average expansion velocity, which indicates significant deceleration as the blast wave interacts with the dense circumstellar medium.

Keywords

supernovae: generalsupernovae: individual: SN 1978Kgalaxies: individual: NGC 1313

References

Kuncarayakti, H., Maeda, K., Anderson, J., Hamuy, M., Nomoto, K., Galbany, L., & Doi, M., 2016, MNRAS, 458, 2063 Google Scholar
Ryder, S., Kotak, R., Smith, I., Tingay, S., Kool, E., & Polshaw, J., 2016, A&A, 595, L9 Google Scholar