论文标题
CFHT和Pan-Starrs的VHS J1256-1257的视差1
The Parallax of VHS J1256-1257 from CFHT and Pan-STARRS 1
论文作者
论文摘要
我们提出了CFHT红外差距计划和PAN-Starrs 3 $π$ Steradian调查的新的视差测量值（$ \ $ \ of \ of \ \ of150-300 $ MYR）Triple System VHS J125601.92 $ -125723.9。该系统由几乎相等的频率二进制（“ AB”）和宽阔的，可能是行星质量伴侣（“ B”）组成。该系统已发布的视差距离（$ 12.7 \ pm1.0 $ PC）意味着与已知的年轻物体相比，绝对幅度异常微弱，并且与中央二进制的分光光度计距离处于紧张状态（$ 17.2 \ pm2.6 $ PC）。我们的CFHT和PAN-Starrs视差是一致的，更精确的CFHT结果将VHS J1256-1257置于$ 22.2^{+1.1} _ { - 1.2} $ PC。我们的新距离为同伴的质量带来了更高的值（$ 19 \ pm5 $ m $ _ {\ rm jup} $）和温度（$ 1240 \ pm50 $ k），并且还将所有三个组件的绝对幅度带入了与已知幼体的绝对幅度。
We present new parallax measurements from the CFHT Infrared Parallax Program and the Pan-STARRS 3$π$ Steradian Survey for the young ($\approx150-300$ Myr) triple system VHS J125601.92$-$125723.9. This system is composed of a nearly equal-flux binary ("AB") and a wide, possibly planetary-mass companion ("b"). The system's published parallactic distance ($12.7\pm1.0$ pc) implies absolute magnitudes unusually faint compared to known young objects and is in tension with the spectrophotometric distance for the central binary ($17.2\pm2.6$ pc). Our CFHT and Pan-STARRS parallaxes are consistent, and the more precise CFHT result places VHS J1256-1257 at $22.2^{+1.1}_{-1.2}$ pc. Our new distance results in higher values for the companion's mass ($19\pm5$ M$_{\rm Jup}$) and temperature ($1240\pm50$ K), and also brings the absolute magnitudes of all three components into better agreement with known young objects.
