论文标题
红色瞬态V838单核的Sio Maser天文学
SiO maser astrometry of the red transient V838 Monocerotis
论文作者
论文摘要
我们以v = 1的sio maser发射的VLBA进行了多个观测，j = 1-0在43 GHz时从红色Nova V838 Mon的残余物中进行了转换。我们对MASER点的位置进行建模，以得出0.166 +/- 0.060 MAS的视差。将这种视差与其他距离信息相结合，导致5.6 +/- 0.5 kpc的距离，它与V838 MON的LIGHT ECHO的极化图像相吻合6.1 +/- 0.6 kpc的独立几何距离。结合了这些结果，包括弱约束的Gaia DR2视差，获得5.9 +/- 0.4 kpc的最佳估计值。 Maser斑点位于〜225 GHz的连续峰附近，SIO J = 5-4用ALMA检测到的热发射。 V838 MON的适当运动证实了其在银河系外螺旋臂的一个小开放簇中的成员资格。
We present multi-epoch observations with the VLBA of SiO maser emission in the v=1, J=1-0 transition at 43 GHz from the remnant of the red nova V838 Mon. We model the positions of maser spots to derive a parallax of 0.166+/-0.060 mas. Combining this parallax with other distance information results in a distance of 5.6+/-0.5 kpc, which agrees with an independent geometric distance of 6.1+/-0.6 kpc from modeling polarimetry images of V838 Mon's light echo. Combining these results, and including a weakly constraining Gaia DR2 parallax, yields a best estimate of distance of 5.9+/-0.4 kpc. The maser spots are located close to the peaks of continuum at ~225 GHz and SiO J=5-4 thermal emission detected with ALMA. The proper motion of V838 Mon confirms its membership in a small open cluster in the Outer spiral arm of the Milky Way.
