SN 2019edo: A Type II-P Supernova with a Fast Brightness Rise and a Short Plateau Phase

Tsvetkov, D. Yu.; Belinsky, A. A.; Иконникова, Н. П.; Бурлак, М. А.; Volkov, I. M.; Pavlyuk, N. N.; Бакланов, П. В.; Блинников, С. И.; Ushakova, M. G.; Echeistov, V.

doi:10.1134/s1063773722040065

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…The discovery of SN 2021hpr was reported by Itagaki (2021) based on a first observation on 59306.4 MJD. Later, a prediscovery detection (59304.92 MJD) was reported by Tsvetkov et al (2021) by 0.3 day before the observation of the Zwicky Transient Factory. The first yet ambiguous classification (Tomasella et al 2021) claimed that the new transient is probably a Type Ia SN due to its Si II λ6355 feature with an expansion velocity of 21 000 km s −1 .…”

Section: Three Supernovae Of Ngc 3147mentioning

confidence: 98%

Three is the magic number: Distance measurement of NGC 3147 using SN 2021hpr and its siblings

Barna,

Nagy,

Bora

et al. 2023

A&A

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Context. The nearby spiral galaxy NGC 3147 hosted three Type Ia supernovae (SNe Ia) in the past decades that have been the subjects of intense follow-up observations. Simultaneous analysis of their data provides a unique opportunity for testing different methods of light curve fitting and distance estimation. Aims. The detailed optical follow-up of SN 2021hpr allows us to revise the previous distance estimations to NGC 3147 and compare the widely used light curve fitting algorithms to each other. After the combination of the available and newly published data of SN 2021hpr, its physical properties can also be estimated with higher accuracy. Methods. We present and analyse new BV griz and Swift photometry of SN 2021hpr to constrain its general physical properties. Together with its siblings, SNe 1997bq and 2008fv, we cross-compared the individual distance estimates of these three SNe given by the Spectral Adaptive Lightcurve Template (SALT) code, and we also checked their consistency with the results from the Multi-Color Light Curve Shape (MLCS) code. The early spectral series of SN 2021hpr was also fit with the radiative spectral code TARDIS to verify the explosion properties and constrain the chemical distribution of the outer ejecta. Results. After combining the distance estimates for the three SNe, the mean distance to their host galaxy, NGC 3127, is 42.5 ± 1.0 Mpc, which matches with the distance inferred by the most up-to-date light curve fitters, SALT3 and BayeSN. We confirm that SN 2021hpr is a Branch-normal Type Ia SN that ejected ~1.12 ± 0.28 M⊙ from its progenitor white dwarf and synthesized ~0.44 ± 0.14 M⊙ of radioactive 56Ni.

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Section: Three Supernovae Of Ngc 3147mentioning

confidence: 98%

Three is the magic number: Distance measurement of NGC 3147 using SN 2021hpr and its siblings

Barna,

Nagy,

Bora

et al. 2023

A&A

View full text Add to dashboard Cite

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“…An exception is the parameter of the pre-supernova radius R. The considered hydrodynamic modelling shows that the pre-SN radius lies in a broad range from 30-720 R and may be different for the same object in different models. For example, there are two models for SN 2008ax, one with a radius of 30-50 R (Folatelli et al 2015) and another one with R = 600 R (Tsvetkov et al 2009). It should be noted that SN 2008ax belongs to the same group of IIb(I) supernovae as SN 2017gpn.…”

Section: Hydrodynamic Models Of Other Sne Iibmentioning

confidence: 99%

Optical and spectral observations and hydrodynamic modelling of type IIb supernova 2017gpn

Balakina

Pruzhinskaya

Москвитин

et al. 2021

Monthly Notices of the Royal Astronomical Society

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In this work we present the photometric and spectroscopic observations of type IIb supernova 2017gpn. This supernova was discovered in the error-box of the LIGO/Virgo G299232 gravitational-wave event. We obtained the light curves in the B and R passbands and modelled them numerically using the one-dimensional radiation hydrocode stella. The best-fitting model has the following parameters: the pre-SN star mass and the radius are M ≈ 3.5 M⊙ and R ≈ 50 R⊙, respectively; the explosion energy is $E_{\rm exp} \approx 1.2\times 10^{51}$ erg; the mass of radioactive nickel is $M_{\rm ^{56}Ni} \approx 0.11$ M⊙, which is completely mixed throughout the ejecta; and the mass of the hydrogen envelope $M_{\rm H\_{env}}$ ≈ 0.06 M⊙. Moreover, SN 2017gpn is a confirmed SN IIb that is located at the farthest distance from the centre of its host galaxy NGC 1343 (i.e. the projected distance is ∼21 kpc). This challenges the scenario of the origin of type IIb supernovae from massive stars.

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Progress in Supernovae Studies with the 2.5-m Telescope at the Caucasus Mountain Observatory of SAI MSU

Tsvetkov,

Pavlyuk,

Echeistov

et al. 2023

Astrophys. Bull.

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SN 2019edo: A Type II-P Supernova with a Fast Brightness Rise and a Short Plateau Phase

Cited by 4 publications

References 33 publications

Three is the magic number: Distance measurement of NGC 3147 using SN 2021hpr and its siblings

Three is the magic number: Distance measurement of NGC 3147 using SN 2021hpr and its siblings

Optical and spectral observations and hydrodynamic modelling of type IIb supernova 2017gpn

Progress in Supernovae Studies with the 2.5-m Telescope at the Caucasus Mountain Observatory of SAI MSU

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