Abstract
The results of UBVRIJHK photometry for the type II-P supernova SN 2018aoq in NGC 4151 obtained from April 4, 2018, to January 14, 2019, with several telescopes, including the 2.5-m telescope at the Caucasus Mountain Observatory of the Sternberg Astronomical Institute of the Moscow State University, are presented. The main parameters of its light curves have been determined. The light and color curves of SN 2018aoq and several well-studied SNe II-P are compared. SN 2018aoq is shown to be intermediate in peak luminosity between SNe II-P with normal and reduced luminosities. Radiation-hydrodynamics simulations of the light curves and velocities of the expanding envelope of SN 2018aoq have been performed using the STELLA code. The best agreement with the observations has been achieved for SN progenitor models with an ejecta mass \(M=14{-}19M_{\odot}\), a mass of radioactive \({}^{56}\)Ni \(M_{{}^{56}{\textrm{Ni}}}=0.01M_{\odot}\), and an explosion energy \(E=(0.4{-}0.6)\times 10^{51}\) erg at metallicity \(Z=0.1Z_{\odot}\). The SN progenitor radius depends on the adopted distance \(D\) to NGC 4151 and its values are \(R_{0}=500R_{\odot}\) at \(D=20\) Mpc and \(R_{0}=400R_{\odot}\) at \(D=16\) Mpc.
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ACKNOWLEDGMENTS
We thank I.M. Volkov, I.V. Nikolenko, T.S. Grishina, S.A. Savchenko, E.N. Kopatskaya, A.A. Vasiliev, and I.S. Troitskii who participated in the observations and helped to carry them out.
Funding
This study was performed using the equipment purchased through the funds of the Development Program of the Moscow State University. The work of P.V. Baklanov on SN simulations with the STELLA code was supported by the Russian Foundation for Basic Research (project no. 21-52-12032). S.I. Blinnikov and M.G. Ushakova thank the Russian Science Foundation for supporting the work on the development of radiation-hydrodynamics methods (grant no. 19-12-00229).
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Tsvetkov, D.Y., Pavlyuk, N.N., Vozyakova, O.V. et al. Type II-P Supernova SN 2018aoq in NGC 4151: Light Curves, Models, and Distance. Astron. Lett. 47, 291–306 (2021). https://doi.org/10.1134/S1063773721050078
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DOI: https://doi.org/10.1134/S1063773721050078