| Name: | SETHULAKSHMI V |
| Affiliation: | INDIAN INSTITUTE OF ASTROPHYSICS / CENTRAL UNIVERSITY OF HARYANA |
| Conference ID : | ASI2024_466 |
| Title : | A comparative study of the type-IIn supernovae, with emphasis on SN2017hcc. |
| Authors : | Authors and Co-Authors
Sethulakshmi.V 1, F. Sutaria 1
|
| Authors Affiliation: | 1 Sethulakshmi.V, F. Sutaria Affiliation (Indian Institute of Astrophysics, Bangalore - 560034, India)
|
| Mode of Presentation: | Poster |
| Abstract Category : | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract : | SN2017hcc in an anonymous host galaxy was remarkable for being a
nearby, strongly polarized super luminous Type IIn supernova.
Multi-epoch, low-resolution optical spectra of SN2017hcc were obtained from the
Indian Astronomical Observatory (IAO) located in Hanle. The analysis
focuses on both emission and absorption lines in the spectrum. The
profiles of the most important emission lines – H-α, H-β, and
H-γ– were studied to extract the various velocity components. By
analyzing these and other lines, we infer the distribution of the
circumstellar medium (CSM) and the possible epochs of its loss from
the progenitor’s outer layers. The multi-epoch spectra are also used
to model the interaction of the supernova ejecta and the dense CSM. We
also present a comparative study of the spectra of 2017hcc with that of
other, well-studied type-IIn events, taken at similar epochs. Our comparative
study allows us to constrain the physical properties (density, opacity
etc.), and morphology of the local CSM across events, and to better
characterize the pre-explosion supernova masses. |
