Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 793, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/793/1/L2
Keywords
Kuiper belt: general
Categories
Funding
- Michael West Fellowship
- Royal Society Newton Fellowship
- German DLR project [50 OR 1108]
- MINECO
- Hungarian Research Fund (OTKA) [K-104607]
- Bolyai Research Fellowship
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We analyze albedo data obtained using the Herschel Space Observatory that reveal the existence of two distinct types of surface among midsized trans-Neptunian objects. A color-albedo diagram shows two large clusters of objects, one redder and higher albedo and another darker and more neutrally colored. Crucially, all objects in our sample located in dynamically stable orbits within the classical Kuiper Belt region and beyond are confined to the bright red group, implying a compositional link. Those objects are believed to have formed further from the Sun than the dark neutral bodies. This color-albedo separation is evidence for a compositional discontinuity in the young solar system.
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