论文标题
矮人Nova V392的古典Nova Persei 2018爆发
Classical Nova Persei 2018 outburst from the dwarf nova V392 Per
论文作者
论文摘要
2018年4月29日,发现了2018年的明亮古典新星(CN)。它的祖先是著名的矮人Nova V392。在此贡献中,我们分析了$ ubvr_ {c} i_ {c} $光度法和CN V392 Per的光谱。从$ v $浅曲线(LC)中,我们发现亮度下降时间t $ _ {2,v} $ = 3 d,t $ _ {3,V} $ = 10 d,并计算出最大$ mv_ {max} $ = -9.30 $ 0.57 $ 0.57 $ new $ mv_ $} $ max $} $} $} $} $} $} $} $}和$ mv_ {15} $关系,采用GAIA数据的CNE数据。我们确定了多余的$ e_ {b-v} $ = 0.90 $ \ pm $ 0.09,距离Nova $ d $ = 3.55 $ \ pm $ 0.6 kpc。以亮度最大获得的光谱类似于F2超级巨头的光谱。通过大气和黑体模型拟合连续体计算得出的辐射光度与我们从光度法中发现的亮度一致。我们估计每v392中的一个白矮人的质量为$ m_ {wd} $ = 1.21 m $ _ {\ odot} $。 2018年的CN可以归类为具有高原类型的快速超级 - 埃德丁顿新星。 Nova在下降过程中显示了HE/N频谱分类,较大的膨胀速度和三峰发射线轮廓,并解释说,赤道环几乎朝上,双极流动几乎与视线对齐。每2018年CN的最大频谱和可用无线电数据用于估计系统的倾斜角度为$ i \ sim $ 9 $^{\ circ} $。向红向和蓝向发射凸起的强度差异可以解释大约1.5倍的退化流量密度。双极流出径向速度的迅速增加$ \ sim $ \ sim $ 300 km/s左右,在最大值后第5天左右,是由燃烧的白矮人的快速双极风引起的,其假磷层缩小后。
On 2018, April 29, a bright classical nova (CN) Per 2018 was discovered. Its progenitor is a well-known dwarf nova V392 Per. In this contribution, we analyze $UBVR_{C}I_{C}$ photometry and optical spectroscopy of the CN V392 Per. From the $V$ light curve (LC) we found the brightness decline times t$_{2,V}$ = 3 d, t$_{3,V}$ = 10 d and calculated absolute magnitude of the nova at maximum $MV_{max}$ = -9.30 ${\pm}$0.57 using the new $MV_{max}$ - t$_{3}$ "universal" decline law and $MV_{15}$ relations, adopting the Gaia data for CNe. We determined the colour excess $E_{B-V}$ = 0.90$\pm$0.09 and distance to the nova $d$ = 3.55$\pm$0.6 kpc. The optical spectrum obtained in brightness maximum resembles that of the F2 supergiant. Its bolometric luminosity computed by fitting the continuum by atmospheric and black-body models is in agreement with the luminosity, that we have found from photometry. We estimated the mass of the ONe white dwarf in V392 Per as $M_{wd}$ = 1.21 M$_{\odot}$. The CN Per 2018 can be classified as a fast super-Eddington nova with an outburst LC of plateau type. Nova displayed He/N spectrum classification, large expansion velocities, and triple-peaked emission-line profiles during the decline, explained by equatorial ring seen nearly face on and a bipolar flow aligned almost with the line of sight. The post maximum spectra of CN Per 2018 and available radio data were used to estimate the inclination angle of the system as $i\sim$ 9$^{\circ}$. The difference in intensity of redward and blueward emission bumps is possible to explain by about 1.5 times higher density of the receding outtflow. The rapid increase of the bipolar outflow radial velocities by $\sim$300 km/s around day 5 after the maximum was caused by the fast bipolar winds from the burning white dwarf after shrinking of its pseudophotosphere.