[PPS03-P01] Multi-band Photometry of Trans-Neptunian Objects in the Subaru Hyper Suprime-Cam Survey
Keywords:Trans-Neptunian objects, color distribution, Subaru Telescope
We performed a photometric measurement of TNOs using the wide-field multi-band imaging data acquired with the 8.2-m Subaru Telescope and Hyper Suprime-Cam (HSC), a gigantic mosaic CCD camera with a wide field-of-view of 1.5 deg in diameter, in the framework of the HSC Subaru Strategic Program. The five broadband (g, r, i, z, and Y) colors over the wavelength range from 0.4 μm to 1.0 μm for 30 known TNOs were obtained from the survey data covering about 500 square degrees. We found that high-I objects (I > 6 deg) classified as the hot classical and scattered populations share similar color property that the reflectance spectra are approximately linear. On the other hand, the cold classical population (I < 6 deg) exhibits reflectance spectra with a steep slope within 0.6 μm. We also found a significant anti-correlation between g-r/r-i colors and inclination in the high-I population, as well as a possible bimodality in the g-i color vs. eccentricity plot.