A Panchromatic View of the Restless SN 2009ip Reveals the Explosive Ejection of a Massive Star Envelope

摘要: The double explosion of SN 2009ip in 2012 raises questions about our understanding the late stages massive star evolution. Here we present a comprehensive study during its remarkable rebrightenings. High-cadence photometric and spectroscopic observations from GeV to radio band obtained variety ground-based space facilities (including Very Large Array, Swift, Fermi, Hubble Space Telescope, XMM) constrain be low energy (E similar 1050 erg for an ejecta mass 0.5 M-circle dot) asymmetric complex medium shaped by multiple eruptions restless progenitor star. Most is radiated as result shock breaking out through dense shell material located at 5 x 10(14) cm with M 0.1 dot, ejected precursor outburst 40 days before major explosion. We interpret NIR excess emission signature further out, origin which has connected documented mass-loss episodes previous years. Our modeling predicts bright neutrino associated break-out if cosmic-ray comparable energy. connect this phenomenology explosive ejection outer layers star, later interacted deposited surroundings eruptions. Future will reveal luminous survived. Irrespective whether was terminal, brought light existence new channels sustained episodic loss, physical yet identified.