APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Shuai Zha (The Chinese University of Hong Kong)
Title: Accretion Induced Collapse of White Dwarf and its Possible Signals
Date (JST): Thu, Jul 07, 2016, 13:30 - 14:30
Place: Seminar Room A
Abstract: Accretion induced collapse (AIC) has long been thought to be an alternative fate of white dwarfs approaching Chandrasekhar mass to Type Ia supernovae (SN Ia). Early work based on researches of stellar evolution and conditions for AIC showed it could have 1% rate of SN Ia. While, simulations showed that few Ni could be synthesized during AIC, and its light curve would be weak and short-lived. As a result, although proposed three decades ago, AIC has not been unambiguously identified through electromagnetic detection yet. Recently gravitational wave (g-wave) and neutrino detection for astrophysical events have become possible, providing new opportunities to search for AIC. Here, I will present our preliminary results from hydrodynamic simulation of AIC, and discuss possible g-wave and neutrino signals resulting from various progenitor properties.