Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-25T20:39:52.288Z Has data issue: false hasContentIssue false
  • English
  • Français

Low-frequency radio view of a fast-blue optical transient - AT 2018cow

Published online by Cambridge University Press:  29 August 2024

A. J. Nayana Open the ORCID record for A. J. Nayana [Opens in a new window]  and
Poonam Chandra
A. J. Nayana*
Affiliation:
Indian Institute of Astrophysics, II Block, Koramangala, Bangalore 560034, India
Poonam Chandra
Affiliation:
National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville VA 22903, USA National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune, India
*
email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present low-frequency (0.40 – 1.25 GHz) radio observations and modeling of a Fast Blue Optical Transient (FBOT), AT2018cow [Nayana & Chandra(2021)]. Our data are best modeled as an inhomogeneous synchrotron emitting region expanding into an ionized circumstellar medium. We estimate the mass-loss rate of the progenitor star and shock parameters at multiple epochs post-explosion and find that the progenitor has gone through an enhanced phase of mass-loss close to its end-of-life.

Keywords

supernovae: individual: AT2018cowradio continuum: generalstars: mass loss
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 602 - 604
Check for updates
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Chevalier, R. A. 1982, ApJ, 259, 302 Google Scholar
Drout, M. R., et al. 1998, ApJ, 499, 810 Google Scholar
Drout, M. R., et al. 2014, ApJ, 794, 23 Google Scholar
Ho, A. Y. Q., et al. 2019, ApJ, 871, 73 CrossRefGoogle Scholar
Lyutikov, M. 2022, arXiv e-prints, arXiv:2204.08366Google Scholar
Margutti, R., et al. 2019, ApJ, 872, 18 Google Scholar
Nayana, A. J., & Chandra, P. 2018, The Astronomer’s Telegram, 11950, 1 Google Scholar
Drout, M. R., et al. 2021, ApJL, 912, L9 CrossRefGoogle Scholar
Prentice, S. J., et al. 2018, ApJL, 865, L3 CrossRefGoogle Scholar
Smartt, S. J., et al. 2018, The Astronomer’s Telegram, 11727, 1 Google Scholar