11th tri-annual CFHT User's Meeting. Brett Gladman, UBC, for the OSSOS collaboration
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1 11th tri-annual CFHT User's Meeting Brett Gladman, UBC, for the OSSOS collaboration
2 The OSSOS award Top-ranked LP from the 2nd 4-year round. Awarded 560 hours, evenly spread (70h/semseter) over 2013A-2016B 100% Megacam 45% Canada, 45% France, 10% Taiwan UVic/HIA UBC Besançon ASIAA Marseille NCU Paris +USA (SWRI, Arizona, Santa Barbara, LCOGT, STSci, U Washington)
3 OSSOS Objectives Probe Kuiper Belt at interesting longitudes (resonant objects) at depths past what even LSST will achieve Use detected outer Solar System objects to constrain planet formation/migration via: Orbits Physical properties (sizes, colours, binarity, etc) A factor of >4 increase of high-precision, well-characterized orbits That means targets discovered in calibrated conditions and tracked to high-precision orbits
4 A complex orbital structure
5 A complex orbital structure
6 Resonance libration The resonance locking results in the a specific object (over many orbits) avoiding Neptune
7
8 Galactic Plane Crosses Ecliptic
9 2013A Discovery 2014A Tracking
10 2013B Discovery 2014B Tracking
11 2013A Discoveries
12 Bannister et al (2016)
13 2013B+ 2014B Discoveries
14 2015A Discoveries 2016A Tracking
15 2015B Discoveries 2016B Tracking
16 2015A Discoveries 2016A Tracking
17
18 OSSOS Data acquisition Strategy Discovery year Blind pointings shearing at mean on-sky rate of Kuiper Belt Critical 'discovery triple' in opposition dark run Tracking year Hand-chosen recovery pointings
19
20
21 H L S
22
23 ONLY CFHT can do this! Combination of: Queue scheduled observations Queue programming is responsive/flexible Ephemeris targeting is implemented Seeing-dependent exposure times for tracking observations permitted Priority needed for time constrained observations is provided by QSO+ranking RESULT: HIGH QUALITY ORBITS
24 OSSOS astrometric quality is factor 2.5 better than data in Minor Planet Centre
25 H L S
26 OSSOS astrometric quality is factor 2.5 better than data in Minor Planet Centre
27 Bannister et al (2016)
28 13-16 months 0.01% Bannister et al (2016) MPC 10 years!
29 Filter and IQ evolution OSSOS LP has spanned the introduction of: Activation of Megacam's ears New filters Dome venting
30
31 old-r
32 new-r
33 w/gri
34 2015A Discoveries 2016A Tracking
35 P Block characterization
36
37 OSSOS Collaboration Structure CORE Team Moving-Object Detection Pipeline Object linkage across dark runs Orbit calculation and classification Binaries Team Catalogs Team Lightcurves Team Cometary Activity Team Occultations Team Surfaces Team Scattering/Oort Cloud Team Resonant Objects Team Thermal Modeling Team
38
39 OSSOS Collaborators Core : B. Gladman, J. Kavelaars, J-M. Petit, M. Bannister, S. Gwyn, M. Alexandersen, Y. Chen, M. Alexandersen Binaries: A. Parker, S. Bennechi, W. Grundy, D. Hestroffer, E. Lin, K. Noll Catalogs: L. Jones, S. Krughoff, E. Ashton HST Legacy Cometary Activity: P. Rousselot, I. Kulyk, P. Korsen Light Curves: S. Bennechi, L. Jones, P. Lacerda, N. Peixinho, M. Lehner, S. Wang, M. Schwamb HSC awards Occultations: W. Fraser, A. Gulbis, B. Sicardy, T. Lister, M. Granvik,... Resonant objects: R. Murray-Clay, B. Gladman, W. Ip, S. Lawler, Y. Chen, P. Lykawka, K. Volk, S. Greenstreet Scattering/Centaurs: N. Kaib, R. Brasser, S. Tremaine, C. Shankman, J. Kavelaars, C. Chen, M. Jakubik Surfaces: A. Delsanti, M. Bannister, P. Vernazza, W. Fraser, R. Pike, A. Guilbert-Lepoutre, N. Peixhino, M. Lehner, S. Wang ColOSSOS 386 hr G-N
40 Publications already out Bannister et al (2016): First quarter of the survey. Overview of techniques Shankman et al (2016): Size distribution of small outer Solar System objects Volk et al (2016): Resonant populations
41 Extension of cold belt past 2:1
42 Extension of cold belt past 2:1 Bannister et al (2016)
43 Detectability of 3:2 resonators Volk et al (2016)
44 Detectability of 3:2 resonators Volk et al (2016)
45 Detectability of 3:2 resonators Volk et al (2016) A A distribution is diagnostic of mode of Kuiper Belt implantation during planetary migration
46 Shankman et al (2016)
47 Shankman et al (2016)
48 Thank you Looking forward to presenting detailed results at the next CFHT UM! By that time there will be a factor of 3 improvement over CFEPS
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