Authors
J Burke, DA Howell, SK Sarbadhicary, DJ Sand, RC Amaro, D Hiramatsu, C McCully, C Pellegrino, JE Andrews, PJ Brown, Koichi Itagaki, M Shahbandeh, KA Bostroem, L Chomiuk, EY Hsiao, Nathan Smith, S Valenti
Publication date
2021/10/5
Journal
The Astrophysical Journal
Volume
919
Issue
2
Pages
142
Publisher
IOP Publishing
Description
We present photometric and spectroscopic observations of the nearby Type Ia SN 2019yvq, from its discovery∼ 1 day after explosion to∼ 100 days after its peak brightness. This SN exhibits several unusual features, most notably an extremely bright UV excess seen within∼ 5 days of its explosion. As seen in Swift UV data, this early excess outshines its" peak" brightness, making this object more extreme than other supernovae (SNe) with early UV/blue excesses (eg, iPTF14atg and SN 2017cbv). In addition, it was underluminous M B=− 18.4, relatively quickly declining (Δm 15 (B)= 1.37), and shows red colors past its early blue bump. Unusual (although not unprecedented) spectral features include extremely broad-lined and high-velocity Si absorption. Despite obvious differences in peak spectra, we classify SN 2019yvq as a transitional member of the 02es-like subclass due to its similarities in several respects (eg …
Total citations
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Scholar articles
J Burke, DA Howell, SK Sarbadhicary, DJ Sand… - The Astrophysical Journal, 2021