The Runaway Binary LP 400-22 is Leaving the Galaxy

Mukremin Kilic,A Gianninas,Warren R Brown,Hugh C Harris,Conard C Dahn,Marcel A Agueros,Craig O Heinke,Scott J Kenyon,J A Panei, F Camilo

Monthly Notices of the Royal Astronomical Society（2013）

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摘要

We present optical spectroscopy, astrometry, radio and X-ray observations of the runaway binary LP 400−22. We refine the orbital parameters of the system based on our new radial velocity observations. Our parallax data indicate that LP 400−22 is significantly more distant (3σ lower limit of 840 pc) than initially predicted. LP 400−22 has a tangential velocity in excess of 830 km s−1; it is unbound...

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关键词

binaries: close,stars: individual: LP 400−22,stars: individual: WD 2234+222,white dwarfs,Galaxy: kinematics and dynamics,Galaxy: stellar content

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