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

Singh, Mridweeka ; Misra, Kuntal ; Sahu, D K ; Dastidar, Raya ; Gangopadhyay, Anjasha ; Bose, Subhash ; Srivastav, Shubham ; Anupama, G C ; Chakradhari, N K ; Kumar, Brajesh ; Kumar, Brijesh ; Pandey, S B (2017) Exploring the optical behaviour of a Type Iax supernova SN 2014dt Monthly Notices of the Royal Astronomical Society, 474 (2). pp. 2551-2563. ISSN 0035-8711

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Official URL: http://doi.org/10.1093/mnras/stx2916

Related URL: http://dx.doi.org/10.1093/mnras/stx2916

Abstract

We present optical photometric (up to ∼410 d since Bmax) and spectroscopic (up to ∼157 d since Bmax) observations of a Type Iax supernova (SN) 2014dt located in M61. SN 2014dt is one of the brightest and closest (D ∼ 20 Mpc) discovered Type Iax SN. It best matches the light-curve evolution of SN 2005hk and reaches a peak magnitude of MB ∼ −18.13 ± 0.04 mag with Δm15 ∼ 1.35 ± 0.06 mag. The early spectra of SN 2014dt are similar to other Type Iax SNe, whereas the nebular spectrum at 157 d is dominated by narrow emission features with less blending as compared to SNe 2008ge and 2012Z. The ejecta velocities are between 5000 and 1000 km s−1, which also confirms the low-energy budget of Type Iax SN 2014dt compared to normal Type Ia SNe. Using the peak bolometric luminosity of SN 2005hk, we estimate the 56Ni mass of ∼0.14 M⊙. The striking similarity between SN 2014dt and SN 2005hk implies that a comparable amount of 56Ni would have been synthesized in the explosion of SN 2014dt.

Item Type:Article
Source:Copyright of this article belongs to The Royal Astronomical Society
Keywords:techniques: photometric, techniques: spectroscopic, supernovae: general, supernovae: individual: SN 2014dt, galaxies: individual: M61
ID Code:130630
Deposited On:01 Dec 2022 10:41
Last Modified:01 Dec 2022 10:41

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