Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2010-08-05
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
12 pages, 4 figures, accepted for publication in PASP
Scientific paper
We report here the discovery of an new near-equal mass Trans-Neptunian Binaries (TNBs) L5c02 and the and the putative detection of a second TNB (L4k12) among the year two and three detections of the Canada-France-Eclipic Plane Survey (CFEPS). These new binaries (internal designation L4k12 and L5c02) have moderate separations of 0.4" and 0.6" respectively. The follow-up observation confirmed the binarity of L5c02, but L4k12 are still lack of more followup observations. L4k12 has a heliocentric orbital inclination of ~ 35?degree, marking this system as having the highest heliocentric orbital inclination among known near-equal mass binaries. Both systems are members of the classical main Kuiper belt population. Based on the sample of objects searched we determine that the fraction of near-equal mass wide binaries with separations > 0.4" is 1.5% to 20% in the cold main classical Kuiper belt and, if our detection the binarity L4k12 holds, 3% to 43% in the hot main classical objects are binary. In this manuscript we describe our detection process, the sample of objects surveyed, our confirmation observations.
Gladman Brett J.
Huen Ip Wing
Jones Robert L.
Kavelaars John J.
Lin Hsing-Wen
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