| Name: | Naveen Dukiya |
| Affiliation: | Aryabhatta Research Institute of Observational Sciences, Nainital |
| Conference ID : | ASI2023_641 |
| Title : | ASASSN-14il: A potential SN IIn-P type event |
| Authors : | Naveen Dukiya, Kuntal Misra, Anjasha Gangopadhyay et al. |
| Mode of Presentation: | Poster |
| Abstract Category : | Extragalactic Astronomy |
| Abstract : | We present long-term photometric and spectroscopic studies of CSM-ejecta Interacting Supernova ASASSN-14il. It is located in PGC 3093694 at a distance of 88.5 ± 6.2 Mpc and the spectra show a prominent NaID absorption dip at 589.5nm indicating significant host galaxy extinction. It is a bright supernova reaching a Peak V-band magnitude of ~ -19.7mag in around 47 days from the explosion. The multiband lightcurve along with the pseudo-bolometric lightcurve shows a distinct plateau rarely seen in type IIn SNe which suggests it to be a peculiar type IIn-P type of event similar to SN 2011ht, SN 2009kn, SN 1994W, and SN 2005cl. The plateau lasts for >100 days with a tail luminosity decline of ~0.01 mag/day in BgVri bands. The sustained plateau suggests a dence CSM structure. A detailed lightcuve modelling confirms the same. The spectrum shows signs of CSM interaction throughout the SN lifetime along with broader ejecta wings in the later phases. H-alpha decomposition is done to probe the ejecta geometry. The photometric and spectroscopic evolution closely resembles other members of type IIn-P class of SNe.
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