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SN 2020uem: a Possible Thermonuclear Explosion within a Dense Circumstellar Medium. I. The Nature of Type IIn/Ia-CSM SNe from Photometry and Spectroscopy

  • Authors: Kohki Uno, Keiichi Maeda, Takashi Nagao, Tatsuya Nakaoka, Kentaro Motohara, Akito Tajitsu, Masahiro Konishi, Shuhei Koyama, Hidenori Takahashi, Masaomi Tanaka, Hanindyo Kuncarayakti, Miho Kawabata, Masayuki Yamanaka, Kentaro Aoki, Keisuke Isogai, Kenta Taguchi, Mao Ogawa, Koji S. Kawabata, Yuzuru Yoshii, Takashi Miyata, Ryo Imazawa

Kohki Uno et al 2023 The Astrophysical Journal 944 .

  • Provider: AAS Journals

Caption: Figure 5.

Spectral evolution of SN 2020uem (black lines) extending from +22 days to +110 days after discovery. The epoch for each spectrum is shown on the right side. All spectra are corrected to rest wavelengths with the redshift z = 0.041. The red shaded regions are the wavelengths of Hα and Hβ. The blue shaded regions are the wavelengths of He I λ5876 and He I λ7065. For comparison, we plot the spectra of an SN IIn/Ia-CSM, SN 2005gj (Aldering et al. 2006; Silverman et al. 2012, 2013b), with blue lines.

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