论文标题
新的候选发光蓝色变量
A new candidate Luminous Blue Variable
论文作者
论文摘要
我们将IRAS 16115-5044鉴定为先前被归类为原星云（PPN），为候选发光蓝色变量（LBV）。恒星具有高光度（> 10 $^{5.75} $ l_sun），可确保超级状态，具有与LBV相似的温度，具有光度和光谱的变化，并被温暖的灰尘包围。它的近红外频谱显示了几行HI，He I，Fe II，Fe [II]，MGII和Na I，形状从纯吸收和P Cygni曲线到完全发射。这些特征通常在相对罕见的LBV恒星类中一起观察到，其中仅$ \ $ 20在银河系中已知。新分类的关键是，我们计算了一个新的距离和灭绝，该距离和灭绝的光度明显超过了AGB PPNE的亮度，对此，初始质量<8 m_sun。假设单星的演变，我们估计初始质量约为$ 40 m_sun。
We identify IRAS 16115-5044, which was previously classified as a protoplanetary nebula (PPN), as a candidate luminous blue variable (LBV). The star has high luminosity (>10$^{5.75}$ L_Sun), ensuring supergiant status, has a temperature similar to LBVs, is photometrically and spectroscopically variable, and is surrounded by warm dust. Its near-infrared spectrum shows the presence of several lines of HI, He I, Fe II, Fe [II], MgII, and Na I with shapes ranging from pure absorption and P Cygni profiles to full emission. These characteristics are often observed together in the relatively rare LBV class of stars, of which only $\approx$20 are known in the Galaxy. The key to the new classification is the fact that we compute a new distance and extinction that yields a luminosity significantly in excess of those for post-AGB PPNe, for which the initial masses are <8 M_Sun. Assuming single star evolution, we estimate an initial mass of $\approx$40 M_Sun.
