SN2017ein: bolometric light curve and physical parameters

  • P.S. Tadjimuratov
  • D. Mirzakulov

Abstract

Apparent stellar magnitudes observed at Maidanak observatory for SN2017ein – peculiarly faint core-collapse supernova rumored to have images of progenitor – are processed to get exact photometric data. Technique of photometry is described and the data itself is presented. Based on photometric data of B and R bands we used the regressional equation proposed by Lyman and Bersier to reconstruct the quasi-bolometric light curve. Reconstructed light curve has a peak luminosity of ∼ 3.3 ⋅ 1041 erg/s which is almost an order of magnitude lower than typical values for such supernovae. Further, we used reconstructed bolometric values to estimate physical parameters using simple one-component models for photospheric and nebular phases. Fitting the models to reconstructed quasi-bolometric light curve allows us to estimate physical parameters. Such estimation yields 0.037 M⊙ for nickel-56 mass, 1.246M⊙ for ejected mass and 1.641 · 1051 erg for final kinetic energy of ejecta. Ejecta mass looks very small for proposed progenitor candidate, but some explanations for such discrepancy are already proposed.
 
How to Cite
TADJIMURATOV, P.S.; MIRZAKULOV, D.. SN2017ein: bolometric light curve and physical parameters. Physical Sciences and Technology, [S.l.], v. 4, n. 1, p. 15-19, june 2018. ISSN 2409-6121. Available at: <https://phst.kaznu.kz/index.php/journal/article/view/118>. Date accessed: 19 jan. 2022. doi: https://doi.org/10.26577/phst-2017-1-118.
Section
Nuclear Physics and Related Techology