Can a planetary system survive a host star supernova explosion?

ORAL

Abstract

Recent searches for extrasolar planets have brought a surprising discovery – almost any star seems to have a planetary system around it. We know that massive stars end their lives in a violent supernova explosion, during which an extremely large amount of energy (~3x1046 J) is released from the star in a very short time. Can a planetary system survive such a violent event? In the current presentation, we analyze, based on known physics, the effect of a supernova explosion – primarily the impact of the neutrino flash, the gamma ray flash, and the expanding plasma shell on a planetary orbit. Our calculations show that a planet is not kicked out of its orbit due to the star’s radiation pressure, but the momentum of the exploding star shell can significantly disrupt the orbit of the planet (depending on the planet's mass and proximity to the host star). If a star loses too much mass to the expanding shell, any orbiting planet will escape. Also, if a star’s collapse is asymmetric then the star itself can leave the planetary system due to the momentum of the asymmetric neutrino radiation. The sequence of events during a supernova explosion and how they influence such a planet is discussed in the presentation.

Presenters

  • Benjamin Miera

    Utah Valley University

Authors

  • Benjamin Miera

    Utah Valley University

  • Alex Panin

    utah valley university