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Exploring the optical behaviour of a type Iax supernova SN 2014dt | | Mridweeka Singh
; Kuntal Misra
; D. K. Sahu
; Raya Dastidar
; Anjasha Gangopadhyay
; Subhash Bose
; Shubham Srivastav
; G. C. Anupama
; N. K. Chakradhari
; Brajesh Kumar
; Brijesh Kumar
; S. B. Pandey
; | | Date: |
1 Nov 2017 | | 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. | | Source: | arXiv, 1711.0292 | | Services: | Forum | Review | PDF | Favorites | |
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