Poster Talk abstract details
Accretion & magnetic field submergence in neutron star surface
Abstract
Supernova 1987A in the Large Magellanic Cloud was the first nearby supernova in over 400 years.
Fortunately, the LMC has been well studied, and the precursor star has been identified:
SK-69 202 was a 19 MSun B3 I supergiant star with a helium core mass of 6 MSun, an iron core mass of 1.45 MSun and it resulted in a 1.40 MSun neutron star.
Nevertheless, the compact remnant is not detected yet.
We shows simulations HD and MHD of hypercritical accretion onto compact object in SN 1987A. The submergence of the field by any amount of accreted matter can easily explain the absence of PSR activity in recent SNe, but the very existence of PSRs leads to the conclusion that in some fraction of SNe the fallback accretion is weak enough that it allows a re-diffusion of the field in 1E3–1E4 years.
Fortunately, the LMC has been well studied, and the precursor star has been identified:
SK-69 202 was a 19 MSun B3 I supergiant star with a helium core mass of 6 MSun, an iron core mass of 1.45 MSun and it resulted in a 1.40 MSun neutron star.
Nevertheless, the compact remnant is not detected yet.
We shows simulations HD and MHD of hypercritical accretion onto compact object in SN 1987A. The submergence of the field by any amount of accreted matter can easily explain the absence of PSR activity in recent SNe, but the very existence of PSRs leads to the conclusion that in some fraction of SNe the fallback accretion is weak enough that it allows a re-diffusion of the field in 1E3–1E4 years.