Exploring the optical behaviour of a type Iax supernova SN 2014dt

Abstract

We present optical photometric (upto $\sim$410 days since $B$${}_{max}$) and spectroscopic (upto $\sim$157 days since $B$${}_{max}$) observations of a Type Iax supernova (SN) 2014dt located in M61. SN 2014dt is one of the brightest and closest (D $\sim$ 20 Mpc) discovered Type Iax SN. SN 2014dt best matches the light curve evolution of SN 2005hk and reaches a peak magnitude of $M$${}_B$ $\sim$-18.13$\pm$0.04 mag with $\Delta m_{15}$ $\sim$1.35$\pm 0.06$ mag. The early spectra of SN 2014dt are similar to other Type Iax SNe, whereas the nebular spectrum at 157 days is dominated by narrow emission features with less blending as compared to SNe 2008ge and 2012Z. The ejecta velocities are between 5000 to 1000 km sec${}^{-1}$ which also confirms the low energy budget of Type Iax SN 2014dt as compared to normal Type Ia SNe. Using the peak bolometric luminosity of SN 2005hk we estimate ${}^{56}$Ni mass of $\sim$0.14 M${}_{\odot }$ and the striking similarity between SN 2014dt and SN 2005hk implies that a comparable amount of ${}^{56}$Ni would have been synthesized in the explosion of SN 2014dt.

12 figures, 7 tables, Accepted for publication in MNRAS

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• Over 500 Days in the Life of the Photosphere of the Type Iax Supernova SN 2014dt
• Observational properties of a Type Ib Supernova MASTER OT J120451.50+265946.6 in NGC 4080
• Optical studies of a bright Type Iax supernova SN 2020rea
• Observational properties of a bright type Iax SN 2018cni and a faint type Iax SN 2020kyg
• Constraints on the Sub-pc Environment of the Nearby Type Iax SN 2014dt from Deep X-ray and Radio Observations
• Type Iax supernovae as a source of iron-rich silicate dust