@article{2c2fbedbf62a4266a2e9008096be741f,
title = "Further characterization of carbonaceous materials in Hayabusa-returned samples to understand their origin",
abstract = "Carbonaceous materials in the sample catcher of the Hayabusa spacecraft were assigned as category 3 particles. We investigated the category 3 particles with a suite of in situ microanalytical methods. Possible contaminants collected from the cleanrooms of the spacecraft assembly and extraterrestrial sample curation center (ESCuC) were also analyzed in the same manner as category 3 particles for comparison. Our data were integrated with those of the preliminary examination team for category 3 particles. Possible origins for the category 3 particles include contamination before and after the operation of the Hayabusa spacecraft.",
author = "Masayuki Uesugi and Motoo Ito and Hikaru Yabuta and Hiroshi Naraoka and Fumio Kitajima and Yoshinori Takano and Hajime Mita and Yoko Kebukawa and Aiko Nakato and Yuzuru Karouji",
note = "Funding Information: Acknowledgments—The authors express their sincere thanks to Kevin Righter (NASA/JSC) and two anonymous reviewers for their constructive comments, which helped to improve an earlier version of the manuscript. All TEM analyses were undertaken at JEOL (Tokyo, Japan) with the help of I. Ohnishi. STXM-XANES analyses of WP5-01 and RA-QD02-0180-03 were conducted at beamline 4U, UVSOR Facility in the Institute for Molecular Science, supported by the Nanotechnology Platform Program (Molecule and Material Synthesis) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, with the assistance of T. Ohigashi and Y. Inagaki. We thank the Hayabusa2 sampler team for providing the witness plate from the cleanroom of the Hayabusa2 spacecraft and particles collected at SFA/ Tanegashima. We thank the members of ESCuC/JAXA for providing the category 3 particles. This work was partly supported by a Grant-in-Aid for Scientific Research on Innovative Areas (Research Project on Evolution of Molecules in Space; Grant No. 25108006) from the Japan Society for the Promotion of Science (JSPS). Funding Information: The authors express their sincere thanks to Kevin Righter (NASA/JSC) and two anonymous reviewers for their constructive comments, which helped to improve an earlier version of the manuscript. All TEM analyses were undertaken at JEOL (Tokyo, Japan) with the help of I. Ohnishi. STXM-XANES analyses of WP5-01 and RA-QD02-0180-03 were conducted at beamline 4U, UVSOR Facility in the Institute for Molecular Science, supported by the Nanotechnology Platform Program (Molecule and Material Synthesis) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, with the assistance of T. Ohigashi and Y. Inagaki. We thank the Hayabusa2 sampler team for providing the witness plate from the cleanroom of the Hayabusa2 spacecraft and particles collected at SFA/Tanegashima. We thank the members of ESCuC/JAXA for providing the category 3 particles. This work was partly supported by a Grant-in-Aid for Scientific Research on Innovative Areas (Research Project on Evolution of Molecules in Space; Grant No. 25108006) from the Japan Society for the Promotion of Science (JSPS). Publisher Copyright: {\textcopyright} The Meteoritical Society, 2019.",
year = "2019",
month = mar,
doi = "10.1111/maps.13236",
language = "English",
volume = "54",
pages = "638--666",
journal = "Meteoritics and Planetary Science",
issn = "1086-9379",
publisher = "The University of Arkansas Press",
number = "3",
}