论文标题
M33变量GR290（WR/LBV）的不对称星云
Asymmetrical nebula of the M33 variable GR290 (WR/LBV)
论文作者
论文摘要
上下文：GR290（M33 V0532 = Romano的Star）是一个发光的M33对象，该对象是光度变异性（LBV）恒星典型的光度变异性。它位于Hertzsprung-Russell图中的Wolf射线区域内，并在光最小值处拥有WN8型频谱。分析2016年获得的Gran望远镜加拿大加拿大频谱（GTC）光谱得出的结论是，它被主要由中央恒星弹出的材料形成的未解决的HII区域所包围，并披露了第二个，更扩展的不对称发射区域。目的：本文的目的是进一步探索附近GR290环境的结构。方法：在视觉和红色频谱区域中以三个缝隙取向获得了GR290的长缝光谱。分析了每个缝隙的发射线分布。结果：我们确认存在向南延伸约50 pc的不对称HII区域的存在；向北和东南〜30％；向东和西北〜20台PC，西部约10％。我们还提出了第一个属于邻近OB88协会的星星J013501.87+304157.3的光谱，我们将其归类为具有二进制伴侣的B型超级巨头。
Context: GR290 (M33 V0532=Romano's star) is a luminous M33 object undergoing photometric variability typical for luminous blue variable (LBV) stars. It lies inside Wolf-Rayet region in the Hertzsprung-Russell diagram and possesses a WN8 type spectrum at the light minima. Analysis of Gran Telescopio Canarias (GTC) spectra obtained in 2016 led to the conclusion that it is surrounded by an unresolved HII region formed mostly of ejected material from the central star, and disclosed the presence of a second, more extended asymmetrical emission region. Aims: The aim of this paper is to further explore the structure of the nearby environment of GR290. Methods: Long-slit spectra of GR290 were obtained with three slit orientations in the visual and red spectral regions. The emission-line distribution for each slit was analyzed. Results: We confirm the presence of an asymmetric HII region that extends ~50 pc to the south; ~30pc to the north and southeast; ~20 pc to the east and northwest and ~10pc to the west. We also present the first spectrum to be acquired of a star belonging to the neighboring OB88 association, J013501.87+304157.3, which we classify as a B-type supergiant with a possible binary companion.
