论文标题
NOVA V906 CAR的多波长光度法和祖细胞分析
Multi-wavelength Photometry and Progenitor Analysis of the Nova V906 Car
论文作者
论文摘要
我们介绍了经典NOVA V906汽车的光学和红外光度法，也称为Nova Car 2018和Asassn-18FV，由ASASS-SN调查于2018年3月16日UT（MJD 58193.0）发现。 NOVA在MJD 58222.56上达到了最大值，$ V _ {\ rm {max}} = 5.84 \ pm 0.09 $ mag，下降时间为$ t_ {2，v} = 26.2 $ d and $ t_ d and $ t_ {3，v} = 33.0 $ d。来自Evryscope的数据表明，Nova已经在发现前五天降到了$ G'Simeq 13 $ \，MAG，与其静止的幅度$ G = $ g = $ 20.13 $ \ pm $ 0.03。源自高分辨率光谱的NOVA的灭绝显示出与$ a_v = 1.11 _ { - 0.39}^{+0.54} $的前景灭绝一致的估计值。光曲线类似于罕见的C（cusp）类Nova，其急剧下降的斜率为$α= -3.94 $ cusp plare。从LightCurve的下降速率来看，我们估计白色矮人的质量为$ M_ {wd} $ = $ <0.8 $ <0.8 $ <0.8 $ m \ textsubscript {\（\ odot \）}，与$ M_ {wd} = 0.71^{+0.23} _ {+0.23} _ { - 0.19} $ system coct of Modection coct of Modection coct of Modection n of Modact of Modection in quoct of Modact of Synem of Modact。供体恒星可能是0.23-0.43 \，\ msun的K-M矮人，其同伴正在加热。
We present optical and infrared photometry of the classical nova V906 Car, also known as Nova Car 2018 and ASASSN-18fv, discovered by ASASS-SN survey on 16.32 March 2018 UT (MJD 58193.0). The nova reached its maximum on MJD 58222.56 at $V_{\rm{max}} = 5.84 \pm 0.09$ mag and had decline times of $t_{2,V} = 26.2 $ d and $t_{3,V} = 33.0 $ d. The data from Evryscope shows that the nova had already brightened to $g'\simeq 13$\,mag five days before discovery, as compared to its quiescent magnitude of $g=$20.13$\pm$0.03. The extinction towards the nova, as derived from high resolution spectroscopy, shows an estimate consistent with foreground extinction to the Carina Nebula of $A_V = 1.11_{-0.39}^{+0.54}$. The light curve resembles a rare C (cusp) class nova with a steep decline slope of $α=-3.94$ post cusp flare. From the lightcurve decline rate, we estimate the mass of white dwarf to be $M_{WD}$ = $ < 0.8$M\textsubscript{\(\odot\)}, consistent with $M_{WD}=0.71^{+0.23}_{-0.19}$ derived from modelling the accretion disk of the system in quiescence. The donor star is likely a K-M dwarf of 0.23-0.43\,\Msun, which is being heated by its companion.
