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Title: Exploring the optical behaviour of a Type Iax supernova SN 2014dt
Authors: Singh, M
Misra, K
Sahu, D. K
Dastidar, R
Gangopadhyay, A
Bose, S
Srivastav, S
Anupama, G. C
Chakradhari, N. K
Brajesh Kumar
Kumar, B
Pandey, S. B
Keywords: Techniques: photometric;Techniques: spectroscopic;Supernovae: general;Supernovae: individual: SN 2014dt;Galaxies: individual: M61
Issue Date: Feb-2018
Publisher: Oxford University Press on behalf of the Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, Vol. 474, No. 2, pp. 2551–2563
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.
Description: Restricted Access
ISSN: 1365-2966
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Appears in Collections:IIAP Publications

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