The nature of SN 1997D: low-mass progenitor and weak explosion (2007)
Nikolai Chugai And, Nikolai N. Chugai, Victor P. Utrobin
. We analyzed the spectra and light curve of the peculiar type II-P supernova 1997D to recover ejecta parameters. The optimal hydrodynamical model of SN 1997D, which meets observational constraints...
Optical Signatures of Circumstellar Interaction in Type IIP Supernovae (2007)
Chugai, Nikolai N., Chevalier, Roger A., Utrobin, Victor P.
We propose new diagnostics for circumstellar interaction in Type IIP supernovae by the detection of high velocity (HV) absorption features in Halpha and He I 10830 A lines during the photospheric...
Moderate Asphericity of the SN 2002ic Circumstellar Envelope (2006)
Chugai, Nikolai N., Chevalier, Roger A.
The polarization of SN 2002ic interacting with a dense circumstellar envelope is calculated in the context of the asymmetric version of a previously proposed spherical interaction model. The...
Late Emission from the Type Ib/c SN 2001em: Overtaking the Hydrogen Envelope (2005)
Chugai, Nikolai N., Chevalier, Roger A.
The Type Ib/c supernova SN 2001em was observed to have strong radio, X-ray, and Halpha emission at an age of about 2.5 yr. Although the radio and X-ray emission have been attributed to an off-axis...
The type IIn supernova 1994W: evidence for the explosive ejection of a circumstellar envelope (2004)
Chugai, Nikolai N., Blinnikov, Sergei I., Cumming, Robert J., Lundqvist, Peter, Bragaglia, Angela, Filippenko, Alexei V., ...
We present and analyse spectra of the Type IIn supernova 1994W obtained between 18 and 203 days after explosion. During the luminous phase (first 100 d) the line profiles are composed of three major...
SN 1994W: evidence of explosive mass ejection a few years before explosion (2003)
Chugai, Nikolai N., Cumming, Robert J., Blinnikov, Sergei I., Lundqvist, Peter, Filippenko, Alexei V., Barth, Aaron J., ...
We present and analyse spectra of the Type IIn supernova 1994W obtained between 18 and 202 days after explosion. During the first 100 days the line profiles are composed of three major components:...
Probing supernovae ejecta by Halpha damping wings (1999)
It is predicted that H$\alpha$ emission line at the early nebular epoch of type II-P supernovae may display robust observational effects of damping wings. This is illustrated by Monte-Carlo...
The nature of SN 1997D: low-mass progenitor and weak explosion (1999)
Chugai, Nikolai N., Utrobin, Victor P.
We analyzed the spectra and light curve of the peculiar type II-P supernova 1997D to recover ejecta parameters. The optimal hydrodynamical model of SN 1997D, which meets observational constraints at...