论文标题
新的过渡狼射线WN/C以银河系
A New Transition Wolf-Rayet WN/C Star in the Milky Way
论文作者
论文摘要
我们报告了Galaxy中新的过渡型狼射线（WR）WN/C星的发现。根据其坐标（R.A.，dec）J2000 = 18H51M39.7S，-05D34M51.1S，以及从第二盖亚推出的距离（距地球7.11 kpc距离地球7.11 kpc），数据发布，发现WR 121-16位于3 kpc臂，位于3.75 kpc kpc agpc Clact Callcic中心。由大型天空区多对象纤维光谱望远镜（Lamost）和2.16 m望远镜获得的光谱，位于中国的Xinglong天文台，这表明这是过渡WN7O/WC亚型的WR明星。当前的恒星质量约为7.1 m_solar，M_DOT = 10^（ - 4.97）m_solar/yr的质量损失速率，log l/l_solar = 4.88的骨仪亮度和T_* = 47 kk的恒星温度通过与特定的Potsdam potsdam模型拟合，从而得出T_* = 47 kk的恒星温度。 V波段中的大小在13.95和14.14 mag之间变化，而找不到周期。基于光谱，时域数据和GAIA数据的星体解的索引，WR 121-16可能是过渡性WN/C单星，而不是WN+WC二进制。
We report the discovery of a new transition type Wolf-Rayet (WR) WN/C star in the Galaxy. According to its coordinates (R.A., Dec)J2000 = 18h51m39.7s, -05d34m51.1s, and the distance (7.11 kpc away from Earth) inferred from the second Gaia, data release, it's found that WR 121-16 is located in the Far 3 kpc Arm, and it is 3.75 kpc away from the Galactic Center. The optical spectra obtained by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) and the 2.16 m telescope, both located at the Xinglong Observatory in China, indicate that this is a WR star of the transitional WN7o/WC subtype. A current stellar mass of about 7.1 M_solar, a mass-loss rate of M_dot = 10^(-4.97) M_solar/yr, a bolometric luminosity of log L/L_solar = 4.88, and a stellar temperature of T_* = 47 kK are derived, by fitting the observed spectrum with a specific Potsdam Wolf-Rayet (PoWR) model. The magnitude in V-band varies between 13.95 and 14.14 mag, while no period is found. Based on the optical spectra, the time domain data, and the indices of the astrometric solution of the Gaia data, WR 121-16 is likely a transitional WN/C single star rather than a WN+WC binary.
