AffiliationUniv Arizona, Lunar & Planetary Lab
MetadataShow full item record
PublisherOXFORD UNIV PRESS
CitationLarissa Markwardt, D W Gerdes, R Malhotra, J C Becker, S J Hamilton, F C Adams, Search for L5 Earth Trojans with DECam, Monthly Notices of the Royal Astronomical Society, Volume 492, Issue 4, March 2020, Pages 6105–6119, https://doi.org/10.1093/mnras/staa232
RightsCopyright © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)
Collection InformationThis 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 firstname.lastname@example.org.
AbstractMost of the major planets in the Solar system support populations of co -orbiting bodies, known as Trojans, at their L4 and L5 Lagrange points. In contrast, Earth has only one known co -orbiting companion, This paper presents the results from a search for Earth Trojans (ETs) using the DECam instrument on the Blanco Telescope at CTIO, This search found no additional Trojans in spite of greater coverage compared to previous surveys of the L5 point, Therefore, the main result of this work is to place the most stringent constraints to date on the population of ETs. These constraints depend on assumptions regarding the underlying population properties, especially the slope of the magnitude distribution (which in turn depends on the size and albedo distributions of the objects). For standard assumptions, we calculate upper limits to a 90 per cent confidence limit on the L5 population of NET < 1 for magnitude H < 15.5, NET = 60-85 for H < 19.7, and NET = 97 for H = 20.4, This latter magnitude limit corresponds to Trojans 300 m in size for albedo 0,15, At H = 19,7, these upper limits are consistent with previous L4 ET constraints and significantly improve L5 constraints.
VersionFinal published version