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BVR photometry of comets 63P/Wild 1 and C/2012 K1 (PANSTARRS)
Astrophysics and Space Science ( IF 1.8 ) Pub Date : 2020-06-01 , DOI: 10.1007/s10509-020-03814-5
A. S. Betzler , O. F. de Sousa , A. Diepvens , T. M. Bettio

We analyzed the BVR photometry of the comets 63P/Wild 1 and C/2012 K1 (PANSTARRS) obtained between March 2013 and May 2014, with 0.20-m to 2.0-m aperture telescopes installed in Australia, Europa and USA. We have found R-band nuclear magnitudes H 0 = 16.3 ± 0.6 $H_{0}=16.3\pm 0.6$ and 12.52 ± 0.02 $12.52 \pm 0.02$ for 63P and K1 comets. Admitting a geometric albedo equal to 0.04, the nuclei have a radius equal to 1.5 ± 0.4 $1.5\pm 0.4$ and 8.67 ± 0.08 $8.67\pm 0.08$ km respectively. Using the Lomb-Scargle periodogram, we found that the most probable periods of rotation of these nuclei are 14 ± 2 $14\pm 2$ h and 9.4 ± 0.4 $9.4 \pm 0.4$ h, with a peak-to-peak light curve amplitude of 0.85 ± 0.01 $0.85 \pm 0.01$ and 0.4 ± 0.2 $0.4\pm 0.2$ magnitudes. The inner coma of both comets were probably optically thin and in steady-state during all duration of our observations seasons. The average normalized reflectivity gradient S’ of the coma of 63P and K1 are 10 ± 15 $10\pm 15$ (1 σ $\sigma $ ) and 8 ± 7 $8\pm 7$ %/100 nm in the spectral range between 440 and 647 nm, which have indicated that both comets are statistically redder than the Sun. The Kruskal–Wallis H-test suggests that the distribution of the color indexes B-V, V-R, and B-R of the objects are similar, indicating some kind of equality between the physical or mineralogical properties of the comas of these comets.

中文翻译:

彗星 63P/Wild 1 和 C/2012 K1 (PANSTARRS) 的 BVR 测光

我们分析了 2013 年 3 月至 2014 年 5 月期间获得的彗星 63P/Wild 1 和 C/2012 K1 (PANSTARRS) 的 BVR 光度测量,在澳大利亚、欧罗巴和美国安装了 0.20 米至 2.0 米孔径望远镜。我们发现 63P 和 K1 彗星的 R 波段核星等 H 0 = 16.3 ± 0.6 $H_{0}=16.3\pm 0.6$ 和 12.52 ± 0.02 $12.52 \pm 0.02$。承认几何反照率等于 0.04,原子核的半径分别等于 1.5 ± 0.4 $1.5\pm 0.4$ 和 8.67 ± 0.08 $8.67\pm 0.08$ km。使用 Lomb-Scargle 周期图,我们发现这些原子核最可能的旋转周期为 14 ± 2 $14\pm 2$ h 和 9.4 ± 0.4 $9.4 \pm 0.4$ h,具有峰峰值光变曲线幅度0.85 ± 0.01 $0.85 \pm 0.01$ 和 0.4 ± 0.2 $0.4\pm 0.2$ 幅度。在我们观察季节的所有持续时间内,两颗彗星的内部彗发可能在光学上都很薄并且处于稳定状态。63P 和 K1 彗差的平均归一化反射率梯度 S' 为 10 ± 15 $10\pm 15$ (1 σ $\sigma $ ) 和 8 ± 7 $8\pm 7$ %/100 nm 在 440 之间的光谱范围内和 647 nm,这表明两颗彗星在统计上都比太阳更红。Kruskal-Wallis H 检验表明物体的颜色指数 BV、VR 和 BR 的分布相似,表明这些彗星彗发的物理或矿物学特性之间存在某种平等。这表明两颗彗星在统计上都比太阳更红。Kruskal-Wallis H 检验表明物体的颜色指数 BV、VR 和 BR 的分布相似,表明这些彗星彗发的物理或矿物学特性之间存在某种平等。这表明两颗彗星在统计上都比太阳更红。Kruskal-Wallis H 检验表明物体的颜色指数 BV、VR 和 BR 的分布相似,表明这些彗星彗发的物理或矿物学特性之间存在某种平等。
更新日期:2020-06-01
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