科研之友
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摘要
The Galactic hard X-ray transient SWIFT J195509+261406 was first observed as gamma-ray burst GRB 070610. Within 3 days after the burst, more than forty optical flares had been observed. Here, we propose that this peculiar event should be associated with a white dwarf. The hard X-ray burst itself may be triggered by a collision between two planets orbiting the white dwarf. Some cracked fragments produced in the collision then fell onto the surface of the white dwarf over several days, giving birth to the observed optical flares via cyclotron radiation. Our model can satisfactorily explain the basic features of the observations.
- 出版日期2010-1
- 单位南京大学
