A Search for sub-km KBOs with the Method of Serendipitous Stellar Occultations

Abstract

The results of a search for sub-km Kuiper Belt Objects (KBOs) with the method of serendipitous stellar occultations are reported. Photometric time series were obtained on the 1.8m telescope at the Dominion Astrophysical Observatory (DAO) in Victoria, BC, and were analyzed for the presence of occultation events. Observations were performed at 40 Hz and included a total of 5.0 star-hours for target stars in the ecliptic open cluster M35 (beta=0.9deg), and 2.1 star-hours for control stars in the off-ecliptic open cluster M34 (beta=25.7deg). To evaluate the recovery fraction of the analysis method, and thereby determine the limiting detectable size, artificial occultation events were added to simulated time series (1/f scintillation-like power-spectra), and to the real data. No viable candidate occultation events were detected. This limits the cumulative surface density of KBOs to 3.5e10 deg^{-2} (95% confidence) for KBOs brighter than m_R=35.3 (larger than ~860m in diameter, assuming a geometric albedo of 0.04 and a distance of 40 AU). An evaluation of TNO occultations reported in the literature suggests that they are unlikely to be genuine, and an overall 95%-confidence upper limit on the surface density of 2.8e9 deg^{-2} is obtained for KBOs brighter than m_R=35 (larger than ~1 km in diameter, assuming a geometric albedo of 0.04 and a distance of 40 AU) when all existing surveys are combined.

arXiv commentAccepted for publication in AJ

References in corpus (13)

• The Size Distribution of Trans-Neptunian Bodies
• Accretion in the Early Kuiper Belt II. Fragmentation
• Shaping the Kuiper belt size spectrum by shattering large but strengthless bodies
• The Size Distribution of Kuiper Belt Objects
• Accretion in the Early Outer Solar System
• Triton's surface age and impactor population revisited in light of Kuiper Belt fluxes: Evidence for small Kuiper Belt objects and recent geological activity
• Detectability of Occultation of Stars by Objects in the Kuiper Belt and Oort Cloud
• Direct measurement of the size of 2003 UB313 from the Hubble Space Telescope
• Occultation Searches for Kuiper Belt Objects
• WIYN Open Cluster Study. XIX. Main Sequence Fitting Distances to Open Clusters Using V-K Color-Magnitude Diagrams
• The Kuiper Belt and Olbers Paradox
• Kuiper Belt Object Sizes and Distances from Occultation Observations
• Kepler and the Kuiper Belt

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• Pipeline for the Detection of Serendipitous Stellar Occultations by Kuiper Belt Objects with the Colibri Fast-Photometry Array
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• On the Use of Cherenkov Telescopes for Outer Solar System Body Occultations
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