Discovery of a new member of the inner oort cloud from the Next Generation Virgo Cluster Survey

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DOIResolve DOI: http://doi.org/10.1088/2041-8205/775/1/L8
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TypeArticle
Journal titleThe Astrophysical Journal Letters
ISSN2041-8205
Volume775
Issue1
Article numberL8
AbstractWe report the discovery of 2010 GB174, a likely new member of the Inner Oort Cloud (IOC). 2010 GB174 is 1 of 91 trans-Neptunian objects and Centaurs discovered in a 76 deg2 contiguous region imaged as part of the Next Generation Virgo Cluster Survey (NGVS) - a moderate ecliptic latitude survey reaching a mean limiting magnitude of g′ ≃ 25.5 - using MegaPrime on the 3.6 m Canada-France-Hawaii Telescope. 2010 GB 174 is found to have an orbit with a semi-major axis of a ≃ 350.8 AU, an inclination of i ≃ 21.°6, and a pericenter of q ∼ 48.5 AU. This is the second largest perihelion distance among known solar system objects. Based on the sky coverage and depth of the NGVS, we estimate the number of IOC members with sizes larger than 300 km (HV ≤ 6.2 mag) to be ≃ 11, 000. A comparison of the detection rate from the NGVS and the PDSSS (a characterized survey that "rediscovered" the IOC object Sedna) gives, for an assumed a power-law luminosity function for IOC objects, a slope of α ≃ 0.7 ± 0.2. With only two detections in this region this slope estimate is highly uncertain.
Publication date
PublisherIOP Publishing
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21269921
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Record identifier17c27420-ec83-46cf-879b-9e3322a14343
Record created2013-12-13
Record modified2016-07-18
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