Results 21 to 30 of about 3,762 (245)

Exploring the link between molecular cloud ices and chondritic organic matter in laboratory

Nature Communications, 2021
Several scenarios exist to explain the origins of the organic matter found in carbonaceous chondrites. Here, the authors show laboratory experiments confirming that a significant portion of the soluble organic matter can originate from organic ices ...
G. Danger, V. Vinogradoff, M. Matzka, J-C. Viennet, L. Remusat, S. Bernard, A. Ruf, L. Le Sergeant d’Hendecourt, P. Schmitt-Kopplin   +8 more
doaj   +1 more source

Pitted Terrain on Vesta and Implications for the Presence of Volatiles. [PDF]

, 2012
We investigated the origin of unusual pitted terrain on asteroid Vesta, revealed in images from the Dawn spacecraft. Pitted terrain is characterized by irregular rimless depressions found in and around several impact craters, with a distinct morphology
Reddy, V., Preusker, F., Tosi, F., Garry, W.B., Capria, M., Williams, D., Williams, D.A., Nathues, A., Denevi, B.W., Tosi, N., Le Corre, L., Sunshine, J.M., Raymond, C., Li, J.-Y., Buczkowski, D., Petro, N.E., O'Brien, D.P., Petro, N., Wyrick, D., McCord, T.B., Raymond, C.A., McCoy, T., De sanctis, M.C., Russell, C., Russell, C.T., Capaccioni, F., Pieters, C.M., Gaskell, R., Gaskell, R.W., Blewett, D.T., Buczkowski, D.L., Preusker, Frank, OBrien, D., Capria, M.T., Garry, W., Scully, J., Li, J., Denevi, B., Blewett, D., Pieters, C., Sunshine, J., Wyrick, D. Y., Marchi, S., Schenk, P., De Sanctis, M.   +44 more
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Pyrolytic nature of carbonaceous matter in carbonaceous chondrites and secondary metamorphsm [PDF]

, 1991
P(論文)Major carbonaceous matter in five C2 carbonaceous chondrites (Y-791198,Y-74662,Murchison, B-7904,and Y-793321) and six C3 carbonaceous chondrites (Allende, Y-790992,Y-791717,Y-81020,ALH-77003,and ALH-77307) was investigated by pyrolysis-gas ...
Kitajima, Fumio, Murae, Tatsushi, Masuda, Akimasa   +2 more
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Universal Biosignatures for the Detection of Life [PDF]

, 2005
My goal is to identify processes of life that leave measurable effects on an organism's environment, but which are not tied to any particular biochemistry, in order to build a conceptual framework for the search for extraterrestrial life.
Dorn, Evan David
core   +2 more sources

Stellar Outbursts and Chondrite Composition

The Astrophysical Journal, 2023
The temperatures of observed protoplanetary disks are not sufficiently high to produce the accretion rate needed to form stars, nor are they sufficient to explain the volatile depletion patterns in CM, CO, and CV chondrites and terrestrial planets.
Min Li, Zhaohuan Zhu, Shichun Huang, Ning Sui, Michail I. Petaev, Jason H. Steffen   +5 more
doaj   +1 more source

Infrared diffuse reflectance spectra of several thermallymetamorphosed carbonaceous chondrites [PDF]

, 1992
P(論文)Infrared diffuse reflectance spectra (2.53-25μm) were measured for several Antarctic carbonaceous chondrites. Thermally metamorphosed carbonaceous chondrites with CI-CM affinities (Belgica (B)-7904,Yamato (Y)-793321,Y-82162,and Y-86720), which were ...
Miyamoto, Masamichi
core   +2 more sources

Multiwall and bamboo-like carbon nanotubes from the Allende chondrite: A probable source of asymmetry.

PLoS ONE, 2019
This study presents multiwall and bamboo-like carbon nanotubes found in samples from the Allende carbonaceous chondrite using high-resolution transmission electron microscopy (HRTEM).
Hugo I Cruz-Rosas, Francisco Riquelme, Patricia Santiago, Luis Rendón, Thomas Buhse, Fernando Ortega-Gutiérrez, Raúl Borja-Urby, Doroteo Mendoza, Carlos Gaona, Pedro Miramontes, Germinal Cocho   +10 more
doaj   +1 more source

Distribution of s-, r-, and p-process Nuclides in the Early Solar System Inferred from Sr Isotope Anomalies in Meteorites

The Astrophysical Journal Letters, 2023
Nucleosynthetic isotope anomalies in meteorites allow distinguishing between the noncarbonaceous (NC) and carbonaceous (CC) meteorite reservoirs and show that correlated isotope anomalies exist in both reservoirs.
Jonas M. Schneider, Christoph Burkhardt, Thorsten Kleine   +2 more
doaj   +1 more source

Origin of radiogenic 129Xe variations in carbonaceous chondrites [PDF]

, 2022
International audienceCarbonaceous chondrites are pristine witnesses of the formation of the solar system. Among them, the carbon-rich Tarda and Tagish Lake meteorites are thought to have sampled very distant regions of the outer circumsolar disk (Hiroi ...
Marrocchi, Yves, Avice, Guillaume, Meier, M.M.M.   +2 more
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Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu

The Astrophysical Journal Letters, 2023
Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites.
Laurette Piani, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Ken-ichi Bajo, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Liping Qin, Sara S. Russell, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto   +87 more
doaj   +1 more source