论文标题
星际极化和朝向复发的Nova T CRB的灭绝
Interstellar polarization and extinction toward the Recurrent Nova T CrB
论文作者
论文摘要
Spectropolorimetry是诊断星际物质的强大工具，并提供有关Novae爆发后弹出材料几何形状的信息。在本文中，介绍了光谱学观察到与保加利亚人的2.0m RCC望远镜的cassegrain焦点相连的静止时期的复发性nova t crb。使用田间恒星方法估算了对T CRB的星际极化。从2018年2月至2021年8月获得光谱图。在波长范围为4800〜Å〜到8200〜Å〜线性极化程度的最大值为$ p_ {max}（max}（obs）（obs）（\％）（\％）= 0.46 \ pm 0.01 \ pm 0.01 $ 0.01 $ $ upucλ\ of约5200 $Å。位置角度为$ p.a ._ {obs} = 100^{\ circ} .8 \ pm 0^{\ circ} .9 $。在观察过程中，T CRB中没有内在的极化，而衍生值代表星际极化。朝向T CRB的极化是由于前景星际灰尘位于距离高达$ \ $ 400 pc的距离。基于极化程度，对T CRB的星际灭绝为$ e_ {b-v} \大约0.07 $。
Spectropolarimetry is a powerful tool for diagnostic of interstellar matter and gives information on the geometry of the ejected material after the novae outbursts. In this paper are presented spectropolarimetric observations of the recurrent nova T CrB at quiescence obtained with FoReRo2 attached to the Cassegrain focus of the 2.0m RCC telescope of the Bulgarian Rozhen National Astronomical Observatory. The interstellar polarization toward T CrB was estimated using the field stars method. The spectropolarimetric observations were obtained from February 2018 to August 2021. In the wavelength range from 4800~Å~ to 8200~Å~the maximum of the degree of linear polarization is $P_{max}(obs)(\%) = 0.46 \pm 0.01$ at $λ\approx 5200$ Å. The position angle is $P.A._{obs}=100^{\circ}.8 \pm 0^{\circ}.9$. During the observations, there is no intrinsic polarization in T CrB, and the derived values represent interstellar polarization. The polarization toward T CrB is due to the foreground interstellar dust located at the distance up to $\approx$ 400 pc. Based on the degree of polarization the interstellar extinction toward the T CrB is $E_{B-V} \approx 0.07$.
