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East Asian Meeting on Astronomy
October 14(Mon)-18(Fri), 2013
NCU, Taiwan

Poster Presentation

Perspectives for exploring the progenitor systems of Type Ia Supernovae with the FAST

Author(s): Lingzhi Wang(NAOC), Wenwu Tian (NAOC), Xiaohong Cui(NAOC), Hui Zhu(NAOC), Hongquan Su(NAOC), Dan Wu(NAOC)

Presenter: Lingzhi Wang (NAOC)

Type Ia supernovae (SNe) have been used as standard candles to demonstrate the acceleration of the expansion of the Universe. They are thought to originate from a thermonuclear explosion of an accretion carbon-oxygen white dwarf in a close binary system. Little has been known on their progenitor systems so far. Two primary theories on the progenitor system are Single Degenerate and Double Degenerate scenarios. The evolution of the progenitor system shapes the circumstellar environment, different scenarios might develop different relations between radio luminosity and the density of circumstellar material surrounding SNe. Five-hundred-meter Aperture Spherical radio Telescope (FAST) as the largest and most sensitive single dish radio telescope in the world, will enable astronomers to detect Type Ia SNe at luminosity L~3.7×10^23 erg s−1Hz−1 with the distance of 10Mpc (i.e. a sensitivity of 3.1μ Jy at 1.5 GHz). This radio luminosity suggests the mass loss rate of progenitor systems of ~2.3×10−9 Msun yr−1, placing direct constraints on the circumstellar environments of progenitor systems.

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