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1. Comparison of optical spectra between asteroids Ryugu and Bennu: II. High-precision analysis for space weathering trends

Author

Yumoto, K., Tatsumi, E., Kouyama, T., Golish, D. R., Cho, Y., Morota, T., Kameda, S., Sato, H., Rizk, B., DellaGiustina, D. N., Yokota, Y., Suzuki, H., de León, J., Campins, H., Licandro, J., Popescu, M., Rizos, J. L., Honda, R., Yamada, M., Sakatani, N., Honda, C., Matsuoka, M., Hayakawa, M., Sawada, H., Ogawa, K., Yamamoto, Y., Lauretta, D. S., and Sugita, S.

Subjects
Astrophysics - Earth and Planetary Astrophysics, Physics - Space Physics
Abstract

The influence of space weathering on the observed spectra of C-complex asteroids remains uncertain. This has long hindered our understanding of their composition through telescope observations. Multi-band imaging of Ryugu by ONC-T on Hayabusa2 and that of Bennu by MapCam on OSIRIS-REx found opposite spectral trends of space weathering; Ryugu darkened/reddened while Bennu brightened/blued. How the spectra of Ryugu and Bennu evolved relative to each other would place a constraint for understanding their origins and evolutions. In this study, we compared the space weathering trends on Ryugu and Bennu by applying the results of cross calibration between ONC-T and MapCam. We show that the average Bennu surface is brighter by 18.0 $\pm$ 1.5% at 550 nm and bluer by 0.18 $\pm$ 0.03 $\mu$m$^{-1}$ (480-850 nm slope) than Ryugu. The spectral slopes of surface materials are more uniform on Bennu than on Ryugu at spatial scales $\gtrsim$1 m, but Bennu is more heterogeneous at $\lesssim$1 m. This suggests that lateral mixing due to resurfacing may have been more efficient on Bennu. The reflectance-spectral slope distributions of craters on Ryugu and Bennu appeared to follow two trend lines with an offset before cross calibration, but they converged to a single straight trend without a bend after cross calibration. We show that the spectra of the freshest craters on Ryugu and Bennu are indistinguishable within the uncertainty of cross calibration. These results suggest that Ryugu and Bennu initially had similar spectra before space weathering and that they evolved in completely opposite directions along the same trend line, subsequently evolving into asteroids with different disk-averaged spectra. These findings further suggest that space weathering likely expanded the spectral slope variation of C-complex asteroids, implying that they may have formed from materials with more uniform spectral slopes.

Published
2024
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2. Comparison of optical spectra between asteroids Ryugu and Bennu:I. Cross calibration between Hayabusa2/ONC-T and OSIRIS-REx/MapCam

Author

Yumoto, K., Tatsumi, E., Kouyama, T., Golish, D. R., Cho, Y., Morota, T., Kameda, S., Sato, H., Rizk, B., DellaGiustina, D. N., Yokota, Y., Suzuki, H., de Leon, J., Campins, H., Licandro, J., Popescu, M., Rizos, J. L., Honda, R., Yamada, M., Sakatani, N., Honda, C., Matsuoka, M., Hayakawa, M., Sawada, H., Ogawa, K., Yamamoto, Y., Lauretta, D. S., and Sugita, S.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Asteroids (162173) Ryugu and (101955) Bennu observed by Hayabusa2 and OSIRIS-REx share many properties, but spectral observations by the telescopic Optical Navigation Camera (ONC-T) and MapCam detected subtle but significant differences, which may reflect differences in their origin and evolution. Comparing these differences on the same absolute scale is necessary for understanding their causes. However, ONC-T and MapCam have a large imager-to-imager systematic error of up to 15% caused by the difference in radiometric calibration targets. To resolve this problem, we cross calibrated albedo and color data between the two instruments using the Moon as the common calibration standard. The images of the Moon taken by ONC-T and MapCam were compared with those simulated using photometry models developed from lunar orbiter data. Our results show that the cross-calibrated reflectance of Ryugu and Bennu can be obtained by upscaling the pre-cross-calibrated reflectance of Bennu by 13.3 +/- 1.6% at b band, 13.2 +/- 1.5% at v band, 13.6 +/- 1.7% at w band, and 14.8 +/- 1.8% at x band, while those for Ryugu are kept the same. These factors compensate for the imager-to-imager bias caused by differences in targets used for radiometric calibration and solar irradiance models used for data reduction. Need for such large upscaling underscore the importance of using the cross-calibrated data for accurately comparing the Ryugu and Bennu data. The uncertainty in these factors show that the reflectance of Ryugu and Bennu can be compared with <2% accuracy after applying our results. By applying our cross calibration, the geometric albedo of Bennu became consistent with those observed by ground-based telescopes and OVIRS. Our result can be simply applied by multiplying a constant to the publicly available data and enables accurate comparison of the optical spectra of Ryugu and Bennu in future studies.

Published
2023
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3. Particle size distributions inside and around the artificial crater produced by the Hayabusa2 impact experiment on Ryugu

Author

Ogawa, K., Sakatani, N., Kadono, T., Arakawa, M., Honda, R., Wada, K., Shirai, K., Shimaki, Y., Ishibashi, K., Yokota, Y., Saiki, T., Imamura, H., Tsuda, Y., Nakazawa, S., Takagi, Y., Hayakawa, M., Yano, H., Okamoto, C., Iijima, Y., Morota, T., Kameda, S., Tatsumi, E., Cho, Y., Yoshioka, K., Sawada, H., Matsuoka, M., Yamada, M., Kouyama, T., Suzuki, H., Honda, C., and Sugita, S.

Published
2022
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4. Anomalously porous boulders on (162173) Ryugu as primordial materials from its parent body

Author

Sakatani, N., Tanaka, S., Okada, T., Fukuhara, T., Riu, L., Sugita, S., Honda, R., Morota, T., Kameda, S., Yokota, Y., Tatsumi, E., Yumoto, K., Hirata, N., Miura, A., Kouyama, T., Senshu, H., Shimaki, Y., Arai, T., Takita, J., Demura, H., Sekiguchi, T., Müller, T. G., Hagermann, A., Biele, J., Grott, M., Hamm, M., Delbo, M., Neumann, W., Taguchi, M., Ogawa, Y., Matsunaga, T., Wada, T., Hasegawa, S., Helbert, J., Hirata, N., Noguchi, R., Yamada, M., Suzuki, H., Honda, C., Ogawa, K., Hayakawa, M., Yoshioka, K., Matsuoka, M., Cho, Y., Sawada, H., Kitazato, K., Iwata, T., Abe, M., Ohtake, M., Matsuura, S., Matsumoto, K., Noda, H., Ishihara, Y., Yamamoto, K., Higuchi, A., Namiki, N., Ono, G., Saiki, T., Imamura, H., Takagi, Y., Yano, H., Shirai, K., Okamoto, C., Nakazawa, S., Iijima, Y., Arakawa, M., Wada, K., Kadono, T., Ishibashi, K., Terui, F., Kikuchi, S., Yamaguchi, T., Ogawa, N., Mimasu, Y., Yoshikawa, K., Takahashi, T., Takei, Y., Fujii, A., Takeuchi, H., Yamamoto, Y., Hirose, C., Hosoda, S., Mori, O., Shimada, T., Soldini, S., Tsukizaki, R., Ozaki, M., Tachibana, S., Ikeda, H., Ishiguro, M., Yabuta, H., Yoshikawa, M., Watanabe, S., and Tsuda, Y.

Published
2021
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6. Thermally altered subsurface material of asteroid (162173) Ryugu

Author

Kitazato, K., Milliken, R. E., Iwata, T., Abe, M., Ohtake, M., Matsuura, S., Takagi, Y., Nakamura, T., Hiroi, T., Matsuoka, M., Riu, L., Nakauchi, Y., Tsumura, K., Arai, T., Senshu, H., Hirata, N., Barucci, M. A., Brunetto, R., Pilorget, C., Poulet, F., Bibring, J.-P., Domingue, D. L., Vilas, F., Takir, D., Palomba, E., Galiano, A., Perna, D., Osawa, T., Komatsu, M., Nakato, A., Arai, T., Takato, N., Matsunaga, T., Arakawa, M., Saiki, T., Wada, K., Kadono, T., Imamura, H., Yano, H., Shirai, K., Hayakawa, M., Okamoto, C., Sawada, H., Ogawa, K., Iijima, Y., Sugita, S., Honda, R., Morota, T., Kameda, S., Tatsumi, E., Cho, Y., Yoshioka, K., Yokota, Y., Sakatani, N., Yamada, M., Kouyama, T., Suzuki, H., Honda, C., Namiki, N., Mizuno, T., Matsumoto, K., Noda, H., Ishihara, Y., Yamada, R., Yamamoto, K., Yoshida, F., Abe, S., Higuchi, A., Yamamoto, Y., Okada, T., Shimaki, Y., Noguchi, R., Miura, A., Hirata, N., Tachibana, S., Yabuta, H., Ishiguro, M., Ikeda, H., Takeuchi, H., Shimada, T., Mori, O., Hosoda, S., Tsukizaki, R., Soldini, S., Ozaki, M., Terui, F., Ogawa, N., Mimasu, Y., Ono, G., Yoshikawa, K., Hirose, C., Fujii, A., Takahashi, T., Kikuchi, S., Takei, Y., Yamaguchi, T., Nakazawa, S., Tanaka, S., Yoshikawa, M., Watanabe, S., and Tsuda, Y.

Published
2021
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7. Near-infrared Brightness of the Galilean Satellites Eclipsed in Jovian Shadow: A New Technique to Investigate Jovian Upper Atmosphere

Author

Tsumura, K., Arimatsu, K., Egami, E., Hayano, Y., Honda, C., Kimura, J., Kuramoto, K., Matsuura, S., Minowa, Y., Nakajima, K., Nakamoto, T., Shirahata, M., Surace, J., Takahashi, Y., and Wada, T.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

We have discovered that Europa, Ganymede and Callisto are bright around 1.5 {\mu}m even when not directly lit by sunlight, based on observations from the Hubble Space Telescope and the Subaru Telescope. The observations were conducted with non-sidereal tracking on Jupiter outside of the field of view to reduce the stray light subtraction uncertainty due to the close proximity of Jupiter. Their eclipsed luminosity was $10^{-6}$-$10^{-7}$ of their uneclipsed brightness, which is low enough that this phenomenon has been undiscovered until now. In addition, Europa in eclipse was <1/10 of the others at 1.5 {\mu}m, a potential clue to the origin of the source of luminosity. Likewise, Ganymede observations were attempted at 3.6 {\mu}m by the Spitzer Space Telescope but it was not detected, suggesting a significant wavelength dependence. The reason why they are luminous even when in the Jovian shadow is still unknown, but forward-scattered sunlight by haze in the Jovian upper atmosphere is proposed as the most plausible candidate. If this is the case, observations of these Galilean satellites while eclipsed by the Jovian shadow provide us a new technique to investigate Jovian atmospheric composition, and investigating the transmission spectrum of Jupiter by this method is important for investigating the atmosphere of extrasolar giant planets by transit spectroscopy., Comment: 7 pages, 3 figures, accepted to ApJ

Published
2014
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8. The geomorphology, color, and thermal properties of Ryugu : Implications for parent-body processes

Author

Sugita, S., Honda, R., Morota, T., Kameda, S., Sawada, H., Tatsumi, E., Yamada, M., Honda, C., Yokota, Y., Kouyama, T., Sakatani, N., Ogawa, K., Suzuki, H., Okada, T., Namiki, N., Tanaka, S., Iijima, Y., Yoshioka, K., Hayakawa, M., Cho, Y., Matsuoka, M., Hirata, N., Hirata, N., Miyamoto, H., Domingue, D., Hirabayashi, M., Nakamura, T., Hiroi, T., Michikami, T., Michel, P., Ballouz, R.-L., Barnouin, O. S., Ernst, C. M., Schröder, S. E., Kikuchi, H., Hemmi, R., Komatsu, G., Fukuhara, T., Taguchi, M., Arai, T., Senshu, H., Demura, H., Ogawa, Y., Shimaki, Y., Sekiguchi, T., Müller, T. G., Hagermann, A., Mizuno, T., Noda, H., Matsumoto, K., Yamada, R., Ishihara, Y., Ikeda, H., Araki, H., Yamamoto, K., Abe, S., Yoshida, F., Higuchi, A., Sasaki, S., Oshigami, S., Tsuruta, S., Asari, K., Tazawa, S., Shizugami, M., Kimura, J., Otsubo, T., Yabuta, H., Hasegawa, S., Ishiguro, M., Tachibana, S., Palmer, E., Gaskell, R., Le Corre, L., Jaumann, R., Otto, K., Schmitz, N., Abell, P. A., Barucci, M. A., Zolensky, M. E., Vilas, F., Thuillet, F., Sugimoto, C., Takaki, N., Suzuki, Y., Kamiyoshihara, H., Okada, M., Nagata, K., Fujimoto, M., Yoshikawa, M., Yamamoto, Y., Shirai, K., Noguchi, R., Ogawa, N., Terui, F., Kikuchi, S., Yamaguchi, T., Oki, Y., Takao, Y., Takeuchi, H., Ono, G., Mimasu, Y., Yoshikawa, K., Takahashi, T., Takei, Y., Fujii, A., Hirose, C., Nakazawa, S., Hosoda, S., Mori, O., Shimada, T., Soldini, S., Iwata, T., Abe, M., Yano, H., Tsukizaki, R., Ozaki, M., Nishiyama, K., Saiki, T., Watanabe, S., and Tsuda, Y.

Published
2019

9. Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu—A spinning top–shaped rubble pile

Author

Watanabe, S., Hirabayashi, M., Hirata, N., Hirata, Na., Noguchi, R., Shimaki, Y., Ikeda, H., Tatsumi, E., Yoshikawa, M., Kikuchi, S., Yabuta, H., Nakamura, T., Tachibana, S., Ishihara, Y., Morota, T., Kitazato, K., Sakatani, N., Matsumoto, K., Wada, K., Senshu, H., Honda, C., Michikami, T., Takeuchi, H., Kouyama, T., Honda, R., Kameda, S., Fuse, T., Miyamoto, H., Komatsu, G., Sugita, S., Okada, T., Namiki, N., Arakawa, M., Ishiguro, M., Abe, M., Gaskell, R., Palmer, E., Barnouin, O. S., Michel, P., French, A. S., McMahon, J. W., Scheeres, D. J., Abell, P. A., Yamamoto, Y., Tanaka, S., Shirai, K., Matsuoka, M., Yamada, M., Yokota, Y., Suzuki, H., Yoshioka, K., Cho, Y., Tanaka, S., Nishikawa, N., Sugiyama, T., Kikuchi, H., Hemmi, R., Yamaguchi, T., Ogawa, N., Ono, G., Mimasu, Y., Yoshikawa, K., Takahashi, T., Takei, Y., Fujii, A., Hirose, C., Iwata, T., Hayakawa, M., Hosoda, S., Mori, O., Sawada, H., Shimada, T., Soldini, S., Yano, H., Tsukizaki, R., Ozaki, M., Iijima, Y., Ogawa, K., Fujimoto, M., Ho, T.-M., Moussi, A., Jaumann, R., Bibring, J.-P., Krause, C., Terui, F., Saiki, T., Nakazawa, S., and Tsuda, Y.

Published
2019

10. The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy

Author

Kitazato, K., Milliken, R. E., Iwata, T., Abe, M., Ohtake, M., Matsuura, S., Arai, T., Nakauchi, Y., Nakamura, T., Matsuoka, M., Senshu, H., Hirata, N., Hiroi, T., Pilorget, C., Brunetto, R., Poulet, F., Riu, L., Bibring, J.-P., Takir, D., Domingue, D. L., Vilas, F., Barucci, M. A., Perna, D., Palomba, E., Galiano, A., Tsumura, K., Osawa, T., Komatsu, M., Nakato, A., Arai, T., Takato, N., Matsunaga, T., Takagi, Y., Matsumoto, K., Kouyama, T., Yokota, Y., Tatsumi, E., Sakatani, N., Yamamoto, Y., Okada, T., Sugita, S., Honda, R., Morota, T., Kameda, S., Sawada, H., Honda, C., Yamada, M., Suzuki, H., Yoshioka, K., Hayakawa, M., Ogawa, K., Cho, Y., Shirai, K., Shimaki, Y., Hirata, N., Yamaguchi, A., Ogawa, N., Terui, F., Yamaguchi, T., Takei, Y., Saiki, T., Nakazawa, S., Tanaka, S., Yoshikawa, M., Watanabe, S., and Tsuda, Y.

Published
2019

11. Collisional history of Ryugu’s parent body from bright surface boulders

Author

Tatsumi, E., Sugimoto, C., Riu, L., Sugita, S., Nakamura, T., Hiroi, T., Morota, T., Popescu, M., Michikami, T., Kitazato, K., Matsuoka, M., Kameda, S., Honda, R., Yamada, M., Sakatani, N., Kouyama, T., Yokota, Y., Honda, C., Suzuki, H., Cho, Y., Ogawa, K., Hayakawa, M., Sawada, H., Yoshioka, K., Pilorget, C., Ishida, M., Domingue, D., Hirata, N., Sasaki, S., de León, J., Barucci, M. A., Michel, P., Suemitsu, M., Saiki, T., Tanaka, S., Terui, F., Nakazawa, S., Kikuchi, S., Yamaguchi, T., Ogawa, N., Ono, G., Mimasu, Y., Yoshikawa, K., Takahashi, T., Takei, Y., Fujii, A., Yamamoto, Y., Okada, T., Hirose, C., Hosoda, S., Mori, O., Shimada, T., Soldini, S., Tsukizaki, R., Mizuno, T., Iwata, T., Yano, H., Ozaki, M., Abe, M., Ohtake, M., Namiki, N., Tachibana, S., Arakawa, M., Ikeda, H., Ishiguro, M., Wada, K., Yabuta, H., Takeuchi, H., Shimaki, Y., Shirai, K., Hirata, N., Iijima, Y., Tsuda, Y., Watanabe, S., and Yoshikawa, M.

Published
2021
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13. Detailed Images of Asteroid 25143 Itokawa from Hayabusa

Author

Saito, J., Miyamoto, H., Nakamura, R., Ishiguro, M., Michikami, T., Nakamura, A. M., Demura, H., Sasaki, S., Hirata, N., Honda, C., Yamamoto, A., Yokota, Y., Fuse, T., Yoshida, F., Tholen, D. J., Gaskell, R. W., Hashimoto, T., Kubota, T., Higuchi, Y., Nakamura, T., Smith, P., Hiraoka, K., Honda, T., Kobayashi, S., Furuya, M., Matsumoto, N., Nemoto, E., Yukishita, A., Kitazato, K., Dermawan, B., Sogame, A., Terazono, J., Shinohara, C., and Akiyama, H.

Published
2006

14. Cross calibration between Hayabusa2/ONC-T and OSIRIS-REx/MapCam for comparative analyses between asteroids Ryugu and Bennu

Author

Yumoto, K., Tatsumi, E., Kouyama, T., Golish, D. R., Kameda, S., Sato, H., Rizk, B., DellaGiustina, D. N., Yokota, Y., Suzuki, H., de León, J., Campins, H., Licandro, J., Popescu, M., Rizos, J. L., Honda, R., Yamada, M., Morota, T., Sakatani, N., Cho, Y., Honda, C., Matsuoka, M., Hayakawa, M., Sawada, H., Ogawa, K., Yamamoto, Y., Sugita, S., Lauretta, D. S., Yumoto, K., Tatsumi, E., Kouyama, T., Golish, D. R., Kameda, S., Sato, H., Rizk, B., DellaGiustina, D. N., Yokota, Y., Suzuki, H., de León, J., Campins, H., Licandro, J., Popescu, M., Rizos, J. L., Honda, R., Yamada, M., Morota, T., Sakatani, N., Cho, Y., Honda, C., Matsuoka, M., Hayakawa, M., Sawada, H., Ogawa, K., Yamamoto, Y., Sugita, S., and Lauretta, D. S.

Abstract

Proximity observations of (162173) Ryugu by the telescopic Optical Navigation Camera onboard Hayabusa2 and (101955) Bennu by MapCam onboard Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer found opposite spectral trends of space weathering on these carbonaceous asteroids. Whether the space weathering trends on these asteroids evolved from the same starting spectra would place an important constraint for understanding their relation. However, systematic error between data obtained by the two imagers needed to be reduced for accurate comparison. To resolve this problem, we cross calibrated albedo and color data using the Moon as the common standard. We show that the cross-calibrated reflectance can be obtained by upscaling the pre-cross-calibrated reflectance of Bennu by 12 +/- 2% at v-band, reducing the systematic errors down to 2%. The cross-calibrated data show that Bennu is brighter by 16 +/- 2% at v-band and bluer in spectral slope by 0.19 +/- 0.05 (/um) than Ryugu. The spectra of fresh craters on Ryugu and Bennu before cross calibration appeared to follow two parallel trend lines with offset, but they converged to a single trend after cross calibration. Such a post-cross-calibration perspective raise the possibility that Ryugu and Bennu evolved from materials with similar visible spectra but evolved in diverging directions by space weathering. The divergent evolution can be caused by the difference in space weathering dose/process and/or composition of the starting material. Thus, comparing the composition of samples returned from Ryugu and Bennu may change the way we interpret the spectral variation of C-complex asteroids.

Published
2023

19. Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples

Author

Nakamura, T., primary, Matsumoto, M., additional, Amano, K., additional, Enokido, Y., additional, Zolensky, M. E., additional, Mikouchi, T., additional, Genda, H., additional, Tanaka, S., additional, Zolotov, M. Y., additional, Kurosawa, K., additional, Wakita, S., additional, Hyodo, R., additional, Nagano, H., additional, Nakashima, D., additional, Takahashi, Y., additional, Fujioka, Y., additional, Kikuiri, M., additional, Kagawa, E., additional, Matsuoka, M., additional, Brearley, A. J., additional, Tsuchiyama, A., additional, Uesugi, M., additional, Matsuno, J., additional, Kimura, Y., additional, Sato, M., additional, Milliken, R. E., additional, Tatsumi, E., additional, Sugita, S., additional, Hiroi, T., additional, Kitazato, K., additional, Brownlee, D., additional, Joswiak, D. J., additional, Takahashi, M., additional, Ninomiya, K., additional, Takahashi, T., additional, Osawa, T., additional, Terada, K., additional, Brenker, F. E., additional, Tkalcec, B. J., additional, Vincze, L., additional, Brunetto, R., additional, Aléon-Toppani, A., additional, Chan, Q. H. S., additional, Roskosz, M., additional, Viennet, J.-C., additional, Beck, P., additional, Alp, E. E., additional, Michikami, T., additional, Nagaashi, Y., additional, Tsuji, T., additional, Ino, Y., additional, Martinez, J., additional, Han, J., additional, Dolocan, A., additional, Bodnar, R. J., additional, Tanaka, M., additional, Yoshida, H., additional, Sugiyama, K., additional, King, A. J., additional, Fukushi, K., additional, Suga, H., additional, Yamashita, S., additional, Kawai, T., additional, Inoue, K., additional, Nakato, A., additional, Noguchi, T., additional, Vilas, F., additional, Hendrix, A. R., additional, Jaramillo-Correa, C., additional, Domingue, D. L., additional, Dominguez, G., additional, Gainsforth, Z., additional, Engrand, C., additional, Duprat, J., additional, Russell, S. S., additional, Bonato, E., additional, Ma, C., additional, Kawamoto, T., additional, Wada, T., additional, Watanabe, S., additional, Endo, R., additional, Enju, S., additional, Riu, L., additional, Rubino, S., additional, Tack, P., additional, Takeshita, S., additional, Takeichi, Y., additional, Takeuchi, A., additional, Takigawa, A., additional, Takir, D., additional, Tanigaki, T., additional, Taniguchi, A., additional, Tsukamoto, K., additional, Yagi, T., additional, Yamada, S., additional, Yamamoto, K., additional, Yamashita, Y., additional, Yasutake, M., additional, Uesugi, K., additional, Umegaki, I., additional, Chiu, I., additional, Ishizaki, T., additional, Okumura, S., additional, Palomba, E., additional, Pilorget, C., additional, Potin, S. M., additional, Alasli, A., additional, Anada, S., additional, Araki, Y., additional, Sakatani, N., additional, Schultz, C., additional, Sekizawa, O., additional, Sitzman, S. D., additional, Sugiura, K., additional, Sun, M., additional, Dartois, E., additional, De Pauw, E., additional, Dionnet, Z., additional, Djouadi, Z., additional, Falkenberg, G., additional, Fujita, R., additional, Fukuma, T., additional, Gearba, I. R., additional, Hagiya, K., additional, Hu, M. Y., additional, Kato, T., additional, Kawamura, T., additional, Kimura, M., additional, Kubo, M. K., additional, Langenhorst, F., additional, Lantz, C., additional, Lavina, B., additional, Lindner, M., additional, Zhao, J., additional, Vekemans, B., additional, Baklouti, D., additional, Bazi, B., additional, Borondics, F., additional, Nagasawa, S., additional, Nishiyama, G., additional, Nitta, K., additional, Mathurin, J., additional, Matsumoto, T., additional, Mitsukawa, I., additional, Miura, H., additional, Miyake, A., additional, Miyake, Y., additional, Yurimoto, H., additional, Okazaki, R., additional, Yabuta, H., additional, Naraoka, H., additional, Sakamoto, K., additional, Tachibana, S., additional, Connolly, H. C., additional, Lauretta, D. S., additional, Yoshitake, M., additional, Yoshikawa, M., additional, Yoshikawa, K., additional, Yoshihara, K., additional, Yokota, Y., additional, Yogata, K., additional, Yano, H., additional, Yamamoto, Y., additional, Yamamoto, D., additional, Yamada, M., additional, Yamada, T., additional, Yada, T., additional, Wada, K., additional, Usui, T., additional, Tsukizaki, R., additional, Terui, F., additional, Takeuchi, H., additional, Takei, Y., additional, Iwamae, A., additional, Soejima, H., additional, Shirai, K., additional, Shimaki, Y., additional, Senshu, H., additional, Sawada, H., additional, Saiki, T., additional, Ozaki, M., additional, Ono, G., additional, Okada, T., additional, Ogawa, N., additional, Ogawa, K., additional, Noguchi, R., additional, Noda, H., additional, Nishimura, M., additional, Namiki, N., additional, Nakazawa, S., additional, Morota, T., additional, Miyazaki, A., additional, Miura, A., additional, Mimasu, Y., additional, Matsumoto, K., additional, Kumagai, K., additional, Kouyama, T., additional, Kikuchi, S., additional, Kawahara, K., additional, Kameda, S., additional, Iwata, T., additional, Ishihara, Y., additional, Ishiguro, M., additional, Ikeda, H., additional, Hosoda, S., additional, Honda, R., additional, Honda, C., additional, Hitomi, Y., additional, Hirata, N., additional, Hayashi, T., additional, Hayakawa, M., additional, Hatakeda, K., additional, Furuya, S., additional, Fukai, R., additional, Fujii, A., additional, Cho, Y., additional, Arakawa, M., additional, Abe, M., additional, and Tsuda, Y., additional

Published
2023
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20. Smoking remains associated with education after controlling for social background and genetic factors in a study of 18 twin cohorts

Author

Silventoinen, K, Piirtola, M, Jelenkovic, A, Sund, R, Tarnoki, AD, Tarnoki, DL, Medda, E, Nistico, L, Toccaceli, V, Honda, C, Inui, F, Tomizawa, R, Watanabe, M, Sakai, N, Gatz, M, Butler, DA, Lee, J, Lee, SJ, Sung, J, Franz, CE, Kremen, WS, Lyons, MJ, Derom, CA, Vlietinck, RF, Loos, RJF, Tynelius, P, Rasmussen, F, Martin, NG, Medland, SE, Montgomery, GW, Brandt, I, Nilsen, TS, Harris, JR, Tyler, J, Hopper, JL, Magnusson, PKE, Pedersen, NL, Aslan, AKD, Ordonana, JR, Sanchez-Romera, JF, Colodro-Conde, L, Rebato, E, Zhang, D, Pang, Z, Tan, Q, Silberg, JL, Maes, HH, Boomsma, D, Sorensen, TIA, Korhonen, T, Kaprio, J, Silventoinen, K, Piirtola, M, Jelenkovic, A, Sund, R, Tarnoki, AD, Tarnoki, DL, Medda, E, Nistico, L, Toccaceli, V, Honda, C, Inui, F, Tomizawa, R, Watanabe, M, Sakai, N, Gatz, M, Butler, DA, Lee, J, Lee, SJ, Sung, J, Franz, CE, Kremen, WS, Lyons, MJ, Derom, CA, Vlietinck, RF, Loos, RJF, Tynelius, P, Rasmussen, F, Martin, NG, Medland, SE, Montgomery, GW, Brandt, I, Nilsen, TS, Harris, JR, Tyler, J, Hopper, JL, Magnusson, PKE, Pedersen, NL, Aslan, AKD, Ordonana, JR, Sanchez-Romera, JF, Colodro-Conde, L, Rebato, E, Zhang, D, Pang, Z, Tan, Q, Silberg, JL, Maes, HH, Boomsma, D, Sorensen, TIA, Korhonen, T, and Kaprio, J

Abstract

We tested the causality between education and smoking using the natural experiment of discordant twin pairs allowing to optimally control for background genetic and childhood social factors. Data from 18 cohorts including 10,527 monozygotic (MZ) and same-sex dizygotic (DZ) twin pairs discordant for education and smoking were analyzed by linear fixed effects regression models. Within twin pairs, education levels were lower among the currently smoking than among the never smoking co-twins and this education difference was larger within DZ than MZ pairs. Similarly, education levels were higher among former smoking than among currently smoking co-twins, and this difference was larger within DZ pairs. Our results support the hypothesis of a causal effect of education on both current smoking status and smoking cessation. However, the even greater intra-pair differences within DZ pairs, who share only 50% of their segregating genes, provide evidence that shared genetic factors also contribute to these associations.

Published
2022

22. Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth

Author

Tachibana, S., primary, Sawada, H., additional, Okazaki, R., additional, Takano, Y., additional, Sakamoto, K., additional, Miura, Y. N., additional, Okamoto, C., additional, Yano, H., additional, Yamanouchi, S., additional, Michel, P., additional, Zhang, Y., additional, Schwartz, S., additional, Thuillet, F., additional, Yurimoto, H., additional, Nakamura, T., additional, Noguchi, T., additional, Yabuta, H., additional, Naraoka, H., additional, Tsuchiyama, A., additional, Imae, N., additional, Kurosawa, K., additional, Nakamura, A. M., additional, Ogawa, K., additional, Sugita, S., additional, Morota, T., additional, Honda, R., additional, Kameda, S., additional, Tatsumi, E., additional, Cho, Y., additional, Yoshioka, K., additional, Yokota, Y., additional, Hayakawa, M., additional, Matsuoka, M., additional, Sakatani, N., additional, Yamada, M., additional, Kouyama, T., additional, Suzuki, H., additional, Honda, C., additional, Yoshimitsu, T., additional, Kubota, T., additional, Demura, H., additional, Yada, T., additional, Nishimura, M., additional, Yogata, K., additional, Nakato, A., additional, Yoshitake, M., additional, Suzuki, A. I., additional, Furuya, S., additional, Hatakeda, K., additional, Miyazaki, A., additional, Kumagai, K., additional, Okada, T., additional, Abe, M., additional, Usui, T., additional, Ireland, T. R., additional, Fujimoto, M., additional, Yamada, T., additional, Arakawa, M., additional, Connolly, H. C., additional, Fujii, A., additional, Hasegawa, S., additional, Hirata, N., additional, Hirose, C., additional, Hosoda, S., additional, Iijima, Y., additional, Ikeda, H., additional, Ishiguro, M., additional, Ishihara, Y., additional, Iwata, T., additional, Kikuchi, S., additional, Kitazato, K., additional, Lauretta, D. S., additional, Libourel, G., additional, Marty, B., additional, Matsumoto, K., additional, Michikami, T., additional, Mimasu, Y., additional, Miura, A., additional, Mori, O., additional, Nakamura-Messenger, K., additional, Namiki, N., additional, Nguyen, A. N., additional, Nittler, L. R., additional, Noda, H., additional, Noguchi, R., additional, Ogawa, N., additional, Ono, G., additional, Ozaki, M., additional, Senshu, H., additional, Shimada, T., additional, Shimaki, Y., additional, Shirai, K., additional, Soldini, S., additional, Takahashi, T., additional, Takei, Y., additional, Takeuchi, H., additional, Tsukizaki, R., additional, Wada, K., additional, Yamamoto, Y., additional, Yoshikawa, K., additional, Yumoto, K., additional, Zolensky, M. E., additional, Nakazawa, S., additional, Terui, F., additional, Tanaka, S., additional, Saiki, T., additional, Yoshikawa, M., additional, Watanabe, S., additional, and Tsuda, Y., additional

Published
2022
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23. Additional file 1 of Particle size distributions inside and around the artificial crater produced by the Hayabusa2 impact experiment on Ryugu

Author

Ogawa, K., Sakatani, N., Kadono, T., Arakawa, M., Honda, R., Wada, K., Shirai, K., Shimaki, Y., Ishibashi, K., Yokota, Y., Saiki, T., Imamura, H., Tsuda, Y., Nakazawa, S., Takagi, Y., Hayakawa, M., Yano, H., Okamoto, C., Iijima, Y., Morota, T., Kameda, S., Tatsumi, E., Cho, Y., Yoshioka, K., Sawada, H., Matsuoka, M., Yamada, M., Kouyama, T., Suzuki, H., Honda, C., and Sugita, S.

Abstract

Additional file 1: Fig. S1. Overview of the slope around the SCI impact site.

Published
2022
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25. Preflight Calibration Test Results for Optical Navigation Camera Telescope (ONC-T) Onboard the Hayabusa2 Spacecraft

Author

Kameda, S., primary, Suzuki, H., additional, Takamatsu, T., additional, Cho, Y., additional, Yasuda, T., additional, Yamada, M., additional, Sawada, H., additional, Honda, R., additional, Morota, T., additional, Honda, C., additional, Sato, M., additional, Okumura, Y., additional, Shibasaki, K., additional, Ikezawa, S., additional, and Sugita, S., additional

Published
2016
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27. Synthesis of o- and m-Boronophenylalanine

Author

Yoshino, K., Maruyama, T., Takahashi, H., Mori, Y., Kakihana, H., Mishima, Y., Ichihashi, M., Honda, C., Shiono, M., Soloway, Albert H., editor, Barth, Rolf F., editor, and Carpenter, David E., editor

Published
1993
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41. Geologic History and Crater Morphology of Asteroid (162173) Ryugu

Author

Cho, Y., primary, Morota, T., additional, Kanamaru, M., additional, Takaki, N., additional, Yumoto, K., additional, Ernst, C. M., additional, Hirabayashi, M., additional, Barnouin, O. S., additional, Tatsumi, E., additional, Otto, K. A., additional, Schmitz, N., additional, Wagner, R. J., additional, Jaumann, R., additional, Miyamoto, H., additional, Kikuchi, H., additional, Hemmi, R., additional, Honda, R., additional, Kameda, S., additional, Yokota, Y., additional, Kouyama, T., additional, Suzuki, H., additional, Yamada, M., additional, Sakatani, N., additional, Honda, C., additional, Hayakawa, M., additional, Yoshioka, K., additional, Matsuoka, M., additional, Michikami, T., additional, Hirata, N., additional, Sawada, H., additional, Ogawa, K., additional, and Sugita, S., additional

Published
2021
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50. Surface roughness of asteroid (162173) Ryugu and comet 67P/Churyumov–Gerasimenko inferred fromin situobservations

Author

Otto, K A, primary, Matz, K-D, additional, Schröder, S E, additional, Parekh, R, additional, Krohn, K, additional, Honda, R, additional, Kameda, S, additional, Jaumann, R, additional, Schmitz, N, additional, Stephan, K, additional, Sugita, S, additional, Tatsumi, E, additional, Ho, T-M, additional, Koncz, A, additional, Trauthan, F, additional, Cho, Y, additional, Hayakawa, M, additional, Honda, C, additional, Kouyama, T, additional, Matsuoka, M, additional, Morota, T, additional, Mottola, S, additional, Ogawa, K, additional, Preusker, F, additional, Sakatani, N, additional, Sawada, H, additional, Scholten, F, additional, Suzuki, H, additional, Yamada, M, additional, Yokota, Y, additional, and Yoshioka, K, additional

Published
2020
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