论文标题
与T Tauri星星相关的风的高分辨率光谱
High-Resolution Spectroscopy of Winds Associated with T Tauri Stars
论文作者
论文摘要
我们使用Subaru望远镜对T Tauri恒星进行了光学高分辨率光谱。使用来自Keck望远镜和非常大的望远镜的存档数据，除了[O I]在5577 A和6300 A的[O I]除外，我们还检测到[S II]的禁止线，用于13 t tauri恒星。我们认为，这些禁止线的低速成分与T牛族星相关的风中散发出来。使用三条线的两个通量比，我们同时确定了风的氢密度和温度。 T牛里星的风的氢密度为$ 2.5 \ times 10^{6} $ cm $ $^{ - 3} $ - $ 2.5 \ $ 2.5 \ times 10^{9} $ cm $ $^{ - 3} $，温度为10800 -18000 k。 m $ _ {\ odot} $ yr $^{ - 1} $至$ 1.4 \ times 10^{ - 9} $ m $ _ {\ odot} $ yr $^{ - 1} $。发现质量损失率随着质量积聚率的增加而增加。经典T托里恒星的质量损失率与质量积聚率的比率为0.001-0.1，过渡磁盘对象的比率为0.1-1。
We carried out optical high-resolution spectroscopy of T Tauri stars using the Subaru Telescope. Using archived data from the Keck Telescope and the Very Large Telescope, we detected forbidden lines of [S II] at 4069 A, in addition to those of [O I] at 5577 A and 6300 A, for 13 T Tauri stars. We consider that low-velocity components of these forbidden lines emanate from the wind associated with T Tauri stars. Using two flux ratios of the three lines, we simultaneously determined the hydrogen density and temperature of the winds. The winds of T Tauri stars have a hydrogen density of $2.5 \times 10^{6}$ cm$^{-3}$ - $2.5 \times 10^{9}$ cm$^{-3}$ and a temperature of 10800 -18000 K. The mass loss rates by the wind are estimated to lie in the range from $2.0 \times 10^{-10}$ M$_{\odot}$ yr$^{-1}$ to $1.4 \times 10^{-9}$ M$_{\odot}$ yr$^{-1}$. The mass loss rates are found to increase with increasing mass accretion rates. The ratio of the mass loss rate to the mass accretion rate is 0.001-0.1 for classical T Tauri stars and 0.1-1 for transitional disk objects.
