Observations of Supernova SN 2018zd

Tsvetkov, D. Yu.; Goranskij, V. P.; Barsukova, E. A.; Valeev, A. F.; Volkov, I. M.; Pavlyuk, N. N.; Shugarov, S. Yu.; Shatsky, N. I.; Vozyakova, O. V.; Echeistov, V.

doi:10.1134/s1990341322040162

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…The colors are corrected for the color excesses estimated earlier. For comparison, we plot the color curves of type IIn SNe 1997cy (Turatto et al 2000), 2005kd (Tsvetkov 2008), 2010jl (Fransson et al 2014; Tsvetkov et al 2016; Zhang et al 2012), and also for type II SNe, which showed early signs of interaction with circumstellar material: 2014G (Bose et al 2016), 2018zd (Tsvetkov et al 2022; Zhang et al 2020), 2023ixf (Teja et al 2023; Zimmerman et al 2023).…”

Section: Photometrymentioning

confidence: 99%

SNe 2019vxm and 2020tlf: two luminous type II Supernovae with signatures of circumstellar interaction

Tsvetkov,

Pavlyuk,

Dodin

et al. 2024

Astron Nachr

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We present optical spectroscopic and photometric observations of type II SNe 2019vxm and 2020tlf. The photometric monitoring of SN 2019vxm continued for 592 days, two spectra were collected. SN 2020tlf was observed for 163 days and we obtained one spectra. The maximum luminosity of both SNe is high: mag for SN 2019vxm and SN 2020tlf, respectively. SN 2019vxm displays typical for most of SNe IIn photometric evolution: long rise to the maximum and slow brightness decline with several changes of the decline rate. The light curve of SN 2020tlf shows it may be considered as an intermediate object between classes II‐P and II‐L. The spectral evolution of SN 2019vxm was typical for SNe IIn, while for SN 2020tlf only weak signs of circumstellar interaction were observed at maximum light.

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Section: Photometrymentioning

confidence: 99%

SNe 2019vxm and 2020tlf: two luminous type II Supernovae with signatures of circumstellar interaction

Tsvetkov,

Pavlyuk,

Dodin

et al. 2024

Astron Nachr

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SN 2022prv: Bright Type-II Supernova with Signs of Interaction with Circumstellar Matter

Tsvetkov,

Goransky,

Barsukova

et al. 2024

Astrophys. Bull.

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Diversity in Hydrogen-rich Envelope Mass of Type II Supernovae. I. Plateau Phase Light-curve Modeling

Fang,

Maeda,

et al. 2024

ApJ

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We present a systematic study of Type II supernovae (SNe II) originating from progenitors with effective temperatures (T eff) and luminosities closely resembling red supergiants (RSGs) observed in pre-supernova (SN) images and in the Galaxy. Using Modules for Experiments in Stellar Astrophysics, we compute a large grid of massive stars with T eff ranging from 3200 to 3800 K at their RSG phases, with hydrogen envelopes artificially stripped to varying extents (3–10 M ⊙). The light curves of SNe IIP resulting from the explosions of these Galactic-RSG–like progenitors are modeled using STELLA. Our survey of the light curves reveals that partial stripping of the hydrogen envelope creates diversity in the magnitude and duration of SNe IIP light curves, without affecting the position of the RSG progenitor on the Hertzsprung–Russell diagram. For these Galactic-RSG-like progenitor models, we establish an indicator based on the light-curve properties to estimate the hydrogen envelope mass. Additionally, we discuss the effects of material mixing and 56Ni heating. Applying our model grid to a large sample of approximately 100 observed SNe IIP reveals a considerably broader range of hydrogen-rich envelope masses than predicted by standard stellar wind models. This finding suggests that if SNe IIP are explosions of Galactic-like RSGs to explain the diversity in the observed light curves, a significant fraction of them must have experienced substantial mass loss beyond the standard mass-loss prescription prior to their explosions. This finding highlights the uncertainties involved in massive star evolution and the pre-SN mass-loss mechanism.

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Observations of Supernova SN 2018zd

Cited by 3 publications

References 18 publications

SNe 2019vxm and 2020tlf: two luminous type II Supernovae with signatures of circumstellar interaction

SNe 2019vxm and 2020tlf: two luminous type II Supernovae with signatures of circumstellar interaction

SN 2022prv: Bright Type-II Supernova with Signs of Interaction with Circumstellar Matter

Diversity in Hydrogen-rich Envelope Mass of Type II Supernovae. I. Plateau Phase Light-curve Modeling

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