论文标题
来自Atlas双波段光度法的小行星相曲线
Asteroid phase curves from ATLAS dual-band photometry
论文作者
论文摘要
小行星相曲线用于通过确定绝对幅度H来得出基本的物理特性。即将进行的可见遗产对空间和时间（LSST）和中红外接近地点对象监视任务（NEOSM）surveys surveys surveys依赖于这些绝对幅度来得出数百万师范的颜色。此外，相曲线的形状反映了它们的表面组成，从而得出了分类法的结论。我们从小行星地面撞击最后一个警报系统望远镜获得的双波段光度法中得出小行星相曲线。使用贝叶斯参数推断，我们在光度法$ h，g_1，g_2 $ - 和$ h，g^*_ {12} $系统中检索了127,012相曲线的绝对幅度和斜率参数。在观察到的$ g_1，g_2 $ - 分布中，小行星的分类络合物与它们的平均视觉反照率相关。这允许将X复合物区分为使用斜率参数作为反击测量的替代方案，将X复合物区分为P-，M-和电子复合物。此外，分光光度计数据集的分类错误分类以及小行星动态家族的闯入者在$ g_1，g_2 $空间中揭示了自己。 $ h，g^*_ {12} $ - 应用于偶然性观察的模型无法解决目标分类法。 $ g_1，g_2 $相位系数显示大多数分类学络合物的波长依赖性。偶然的小行星观察结果允许确定大量小行星的可靠相曲线。为了确保所获得的绝对幅度适合颜色计算，必须密集地调查未来的调查涵盖相曲线的对立效应，从而最大程度地减少H对H的不确定性。相位曲线斜率参数为分类学分类提供了可访问的维度。
Asteroid phase curves are used to derive fundamental physical properties through the determination of the absolute magnitude H. The upcoming visible Legacy Survey of Space and Time (LSST) and mid-infrared Near-Earth Object Surveillance Mission (NEOSM) surveys rely on these absolute magnitudes to derive the colours and albedos of millions of asteroids. Furthermore, the shape of the phase curves reflects their surface compositions, allowing for conclusions on their taxonomy. We derive asteroid phase curves from dual-band photometry acquired by the Asteroid Terrestrial-impact Last Alert System telescopes. Using Bayesian parameter inference, we retrieve the absolute magnitudes and slope parameters of 127,012 phase curves of 94,777 asteroids in the photometric $H, G_1, G_2$- and $H, G^*_{12}$-systems. The taxonomic complexes of asteroids separate in the observed $G_1, G_2$-distributions, correlating with their mean visual albedo. This allows for differentiating the X-complex into the P-, M-, and E-complexes using the slope parameters as alternative to albedo measurements. Further, taxonomic misclassifications from spectrophotometric datasets as well as interlopers in dynamical families of asteroids reveal themselves in $G_1, G_2$-space. The $H, G^*_{12}$-model applied to the serendipitous observations is unable to resolve target taxonomy. The $G_1, G_2$ phase coefficients show wavelength-dependency for the majority of taxonomic complexes. Serendipitous asteroid observations allow for reliable phase curve determination for a large number of asteroids. To ensure that the acquired absolute magnitudes are suited for colour computations, it is imperative that future surveys densely cover the opposition effects of the phase curves, minimizing the uncertainty on H. The phase curve slope parameters offer an accessible dimension for taxonomic classification.
