论文标题
直接浸入后，非灰色，一个月的KIC 8462852亮度
Non-gray, Month-long Brightening of KIC 8462852 in the Immediate Aftermath of a Deep Dip
论文作者
论文摘要
我们介绍了《神秘之星》（KIC 8462852）长期多频光度监测结果的分析。在$ b $，$ g'$，$ v $，$ v $，$ r'$和$ r'$和$ i_c $ passbands中，已在2017年5月伦敦大学伦敦大学天文台（UCLO）（UCLO）（UCLO）获得了$ 2017和$ 2018之间的undersection $。 Target Star在85天的间隔内展出，在长达几天的$ \ sim5 $ \ sim5 $ \ sim5 $降低了朱利安日期（JD）2458203。在JD 2458215---300之间，我们测量亮度变化，该亮度变化对应于$ a_b/a_v = 1.39 \ pm0.27 $ a_b/a_v = 1.39 \ pm0.27 $， 1.16 \ pm0.11 $，$ a_ {r'}/a_v = 0.80 \ pm0.25 $和$ a_ {ic {ic}/a_v = 0.49 \ pm0.19 $，我们从中推断出Angströmpström吸收系数为$ 1.33 3.2^{+2.6} _ { - 1.0} $）。与长时间的“下降”一样，长期亮度变化的波长依赖性也必须与含有大量亚微米大小晶粒的灰尘分布引起的灭绝相关。这意味着某些共同的机制是导致恒星在这些短时间和更长的时间尺度上的变异性的原因。
We present an analysis of the results of long-term multi-band photometric monitoring of the enigmatic star, KIC 8462852. Observations in the $B$, $g'$, $V$, $r'$ and $I_C$ passbands have been acquired at University College London Observatory (UCLO) between May 2017 and September 2018. We interrogate the wavelength dependence of the $\sim$month-long dimming and brightening exhibited by the target star over an 85-day interval, immediately following a days-long $\sim5$ per cent drop in brightness on Julian Date (JD) 2458203. Between JD 2458215--300 we measure brightness variations which correspond to relative extinctions of $A_B/A_V = 1.39\pm0.27$, $A_{g'}/A_V = 1.16\pm0.11$, $A_{r'}/A_V = 0.80\pm0.25$ and $A_{Ic}/A_V = 0.49\pm0.19$, from which we infer an Angström absorption coefficient of $1.33\pm0.43$ ($R_V \simeq 3.2^{+2.6}_{-1.0}$). As with the days-long `dips', the wavelength dependence of the longer-term brightness variations must also be associated with extinction arising from a dust distribution containing a substantial fraction of sub-micron-sized grains. This implies some common mechanism is responsible for the star's variability over both these short and longer timescales.
