Publications (7)
Study of X-ray emission from the S147 nebula with SRG/eROSITA: X-ray imaging, spectral characterization, and a multiwavelength picture
Miltiadis Michailidis, Gerd Pühlhofer, Werner Becker +11
Simeis 147 (S147, G180.0-01.7, "Spaghetti nebula") is a supernova remnant (SNR) extensively studied across the entire electromagnetic spectrum, from radio to giga-electronvolt …
Circumstellar shell and presupernova emission of SN 2020tlf
Nikolai Chugai, Victor Utrobin
We address a phenomenon of a confined circumstellar (CS) dense shell and powerful presupernova emission of SN 2020tlf (type IIP). Modeling the \ha\ line and the circumstellar inter…
Supernova 1987A: neutrino-driven explosions in three dimensions and light curves
Victor Utrobin, Annop Wongwathanarat, H. -Thomas Janka +1
The well-studied type IIP SN 1987A, produced by the explosion of a blue supergiant (BSG) star, is a touchstone for massive-star evolution, simulations of neutrino-driven explosions…
The morphology of the ejecta of SN 1987A at 31 years from 1150 to 10000 Ã
Tuomas Kangas, Claes Fransson, Josefin Larsson +7
We present spectroscopy of the ejecta of SN 1987A in 2017 and 2018 from the Hubble Space Telescope and the Very Large Telescope, covering the wavelength range between and $1…
Explosions of blue supergiants from binary mergers for SN 1987A
Athira Menon, Victor Utrobin, Alexander Heger
Based on the work of Menon & Heger (2017), we present the bolometric light curvesand spectra of the explosions of blue supergiant progenitors from binary mergers. We study SN 1987A…
Origin of broad He II 4686Ã emission in early spectra of type IIP supernovae
Nikolai Chugai, Victor Utrobin
We propose a model for the origin of the broad He II 4686A emission in the early spectrum of type II SN~2020jfo. The 4686A line is emitted presumably by dense fragments embedded in…
Three-dimensional mixing and light curves: constraints on the progenitor of supernova 1987A
Victor Utrobin, Annop Wongwathanarat, H. -Thomas Janka +3
With the same method as used previously, we investigate neutrino-driven explosions of a larger sample of blue supergiant models. The larger sample includes three new presupernova s…