Near-infrared observations of active asteroid (3200) Phaethon reveal no evidence for hydration
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Takir, DrissKareta, Theodore
Emery, Joshua P
Hanuš, Josef
Reddy, Vishnu
Howell, Ellen S
Rivkin, Andrew S
Arai, Tomoko
Affiliation
Univ Arizona, Lunar & Planetary LabIssue Date
2020-04-28
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NATURE PUBLISHING GROUPCitation
Takir, D., Kareta, T., Emery, J.P. et al. Near-infrared observations of active asteroid (3200) Phaethon reveal no evidence for hydration. Nat Commun 11, 2050 (2020). https://doi.org/10.1038/s41467-020-15637-7Journal
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This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply 2020. This article is licensed under a Creative Commons Attribution 4.0 International License.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Asteroid (3200) Phaethon is an active near-Earth asteroid and the parent body of the Geminid Meteor Shower. Because of its small perihelion distance, Phaethon's surface reaches temperatures sufficient to destabilize hydrated materials. We conducted rotationally resolved spectroscopic observations of this asteroid, mostly covering the northern hemisphere and the equatorial region, beyond 2.5-mu m to search for evidence of hydration on its surface. Here we show that the observed part of Phaethon does not exhibit the 3-mu m hydrated mineral absorption (within 2 sigma). These observations suggest that Phaethon's modern activity is not due to volatile sublimation or devolatilization of phyllosilicates on its surface. It is possible that the observed part of Phaethon was originally hydrated and has since lost volatiles from its surface via dehydration, supporting its connection to the Pallas family, or it was formed from anhydrous material. The surface of active asteroid (3200) Phaethon, parent body of the Geminid meteor shower, reaches temperatures sufficient to destabilize hydrated materials. Here, the authors show that the northern hemisphere and the equatorial region of this asteroid reveal no evidence of hydration in the near-infrared spectra.Note
Open access journalISSN
2041-1723PubMed ID
32345969Version
Final published versionae974a485f413a2113503eed53cd6c53
10.1038/s41467-020-15637-7
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Except where otherwise noted, this item's license is described as This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply 2020. This article is licensed under a Creative Commons Attribution 4.0 International License.
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