A model for the optical flares from the Galactic transient SWIFT J195509+261406  

作　　者：XU Ming & HUANG YongFeng Department of Astronomy,Nanjing University,Nanjing 210093,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第S1期91-93,共3页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 10625313);the National Basic Research Program of China (Grant No. 2009CB824800)

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.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.

关 键 词：GAMMA-RAY BURSTS white DWARFS CYCLOTRON radiation 

分 类 号：P172.3[天文地球—天文学]