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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28987
Title: Observations of a Fast-expanding and UV-bright Type Ia Supernova SN 2013gs
Authors: Zhang, Tianmeng
Wang, Xiaofeng
Zhao, Xulin
Xu, Dong
REGUITTI, ANDREA
Zhang, Jujia
PASTORELLO, Andrea 
TOMASELLA, Lina 
OCHNER, PAOLO
TARTAGLIA, LEONARDO
BENETTI, Stefano 
TURATTO, Massimo 
HARUTYUNYAN, AVET
ELIAS DE LA ROSA, NANCY DEL CARMEN 
Huang, Fang
Zhang, Kaicheng
Chen, Juncheng
Jiang, Zhaoji
Ma, Jun
Nie, Jundan
Peng, Xiyan
Zhou, Xu
Zhou, Zhimin
Zou, Hu
Issue Date: 2019
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 872
Issue: 1
First Page: 14
Abstract: In this paper, we present extensive optical and ultraviolet (UV) observations of the type Ia supernova (SN Ia) 2013gs discovered during the Tsinghua-NAOC Transient Survey. The photometric observations in the optical show that the light curves of SN 2013gs are similar to those of normal SNe Ia, with an absolute peak magnitude of M <SUB> B </SUB> = -19.25 ± 0.15 mag and a post-maximum decline rate ∆m <SUB>15</SUB>(B) = 1.00 ± 0.05 mag. Gehrels Swift Ultra-Violet/Optical Telescope observations indicate that SN 2013gs shows unusually strong UV emission (especially in the uvw1 band) at around the maximum light (M <SUB> uvw1</SUB> ∼ -18.9 mag). The SN is characterized by relatively weak Fe II III absorptions at ∼5000 Å in the early spectra and a larger expansion velocity (v <SUB>Si</SUB> ∼ 13,000 km s<SUP>-1</SUP> around the maximum light) than the normal-velocity SNe Ia. We discuss the relation between the {uvw}1-v color and some observables, including Si II velocity, line strength of Si II λ6355 and Fe II/III lines, and ∆m <SUB>15</SUB>(B). Compared to other fast-expanding SNe Ia, SN 2013gs exhibits Si and Fe absorption lines with similar strength and bluer {uvw}1-v color. We briefly discussed the origin of the observed UV dispersion of SNe Ia.
URI: http://hdl.handle.net/20.500.12386/28987
URL: https://iopscience.iop.org/article/10.3847/1538-4357/aafacd
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aafacd
Bibcode ADS: 2019ApJ...872...14Z
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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