SN 2008iy circumstellar interaction: Bright and lesser light effect
arXiv:2110.14409 · doi:10.1093/mnras/stab2981
Abstract
Optical photometry and spectra of the luminous type IIn supernova SN~2008iy are analysed in detail with implications for cosmic ray acceleration and the radio emission. The light curve and expansion velocities indicate ejecta with the kinetic energy of erg to collide with the Msun circumstellar envelope. The luminous Ha is explained as originated primarily from circumstellar clouds interacting with the forward shock. For the first time the fluorescent OI 8446A emission is used to demonstrate that the cloud fragmentation cascade spans a scale range > 2.3 dex. The narrow circumstellar Ha permitted us to estimate the acceleration efficiency of cosmic rays. The found value is close to the efficiency inferred in the same way for other two SNe~IIn, SN~1997eg and SN~2002ic. The efficiency of cosmic ray acceleration is utilized to reproduce the radio flux from SN~2008iy for the amplified magnetic field consistent with the saturated turbulent magnetic field in the diffusive shock acceleration mechanism.
arXiv commentMNRAS, accepted
References in corpus (19)
- Pulsational pair instability as an explanation for the most luminous supernovae
- Flash Spectroscopy: Emission Lines from the Ionized Circumstellar Material around -Day-Old Type II Supernovae
- Shell-shocked diffusion model for the light curve of SN2006gy
- Setting the Stage for Circumstellar Interaction in Core-Collapse Supernovae II: Wave-Driven Mass Loss in Supernova Progenitors
- Optical and Infrared Spectroscopy of the type IIn SN 1998S : Days 3-127
- On the source of the late-time infrared luminosity of SN 1998S and other type II supernovae
- Rayleigh-Taylor Instabilities in Young Supernova Remnants Undergoing Efficient Particle Acceleration
- Type IIn Supernova SN 2010jl: Optical Observations for Over 500 Days After Explosion
- Neutrino-driven Explosions
- SN 1988Z: Spectro-photometric catalogue and energy estimates
- Interaction of Rayleigh-Taylor Fingers and Circumstellar Clodlets in Young Supernova Remnants
- On the nature of the circumstellar medium of the remarkable type Ia/IIn supernova, SN 2002ic
- Properties of Newly Formed Dust Grains in The Luminous Type IIn Supernova 2010jl
- SN 2008iy: An Unusual Type IIn Supernova with an Enduring 400 Day Rise Time
- Circumstellar interaction of the type Ia supernova 2002ic
- The circumstellar material around SN IIn 1997eg: Another detection of Very Narrow P Cygni profile
- Supernova Interaction with a Dense Detached Shell in SN 2001em
- Type IIn SN~2010jl: probing dusty line-emitting shell
- Wind of presupernova IIn SN~1997eg