Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

SN 2017fzw: A Fast-expanding Type Ia Supernova with Transitional Features

Jia-Yu Huang
,
Yang-Yang Li
,
Xiang-Yun Zeng
* ORCID logo ,
Sheng Zheng
* ,
Sarah A.Bird
,
Ju-Jia Zhang
ORCID logo ,
Ali Esamdin
,
Abdusamatjan Iskandar
,
K. Azaleee Bostroem
,
Shuguang Zeng
,
Yan-shan Xiao
,
Yao Huang
,
D. Andrew Howell
,
Curtis McCully
,
Wen-Xiong Li
,
Tian-Meng Zhang
,
Li-Fan Wang
,
Lei Hu
Version 1 : Received: 16 May 2023 / Approved: 17 May 2023 / Online: 17 May 2023 (14:21:28 CEST)

A peer-reviewed article of this Preprint also exists.

Huang, J.; Li, Y.; Zeng, X.; Zheng, S.; Bird, S.A.; Zhang, J.; Esamdin, A.; Iskandar, A.; Bostroem, K.A.; Zeng, S.; Xiao, Y.; Huang, Y.; Howell, D.A.; McCully, C.; Li, W.; Zhang, T.; Wang, L.; Hu, L. SN 2017fzw: A Fast-Expanding Type Ia Supernova with Transitional Features. Universe 2023, 9, 295. Huang, J.; Li, Y.; Zeng, X.; Zheng, S.; Bird, S.A.; Zhang, J.; Esamdin, A.; Iskandar, A.; Bostroem, K.A.; Zeng, S.; Xiao, Y.; Huang, Y.; Howell, D.A.; McCully, C.; Li, W.; Zhang, T.; Wang, L.; Hu, L. SN 2017fzw: A Fast-Expanding Type Ia Supernova with Transitional Features. Universe 2023, 9, 295.

Abstract

In this study, we analyzed the optical observations of a subluminous Type Ia supernova (SN Ia) 2017fzw, which exhibited high photospheric velocity (HV) at B-band maximum light. The absolute B-band peak magnitude was determined to be MBmax = -17.77  0.10 mag, similar to 91bg-like SNe Ia. The decline rate of the B-band light curve was estimated to be Dm15(B) = 1.60  0.06 mag. The spectra of SN 2017fzw were similar to those of 91bg-like SNe Ia, with prominent Ti II and Si II l5972 features at early phases, gradually transitioning to spectra resembling normal (mainly HV subclass) SNe Ia at later phases, with a stronger Ca II NIR feature. Notably, SN 2017fzw exhibited spectral evolution features similar to those of HV SNe Ia at all phases, with a maximum-light Si II l6355 velocity of 13, 786  414 km s

Keywords

supernovae; general; supernovae; individual: SN 2017fzw; transitional supernovae

Subject

Physical Sciences, Astronomy and Astrophysics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Comments (0)

Comment 1
Received: 17 May 2023
Commenter: Peter A Milne
The commenter has declared there is no conflict of interests.
Comment: Hello. I would be interested in obtaining the photometry of SN 2017fzw (Table A1), once it is available. I find your paper interesting.
Cheers,
Peter M
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