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Dynamical mass and multiplicity constraints on co-orbital bodies around stars
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Veras, Dimitri, Marsh, T. R. and Gänsicke, B. T. (Boris T.) (2016) Dynamical mass and multiplicity constraints on co-orbital bodies around stars. Monthly Notices of the Royal Astronomical Society, 461 (2). pp. 1413-1420. doi:10.1093/mnras/stw1324 ISSN 0035-8711.
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Official URL: http://mnrasl.oxfordjournals.org/
Abstract
Objects transiting near or within the disruption radius of both main sequence (e.g. KOI 1843) and white dwarf (WD 1145+017) stars are now known. Upon fragmentation or disintegration, these planets or asteroids may produce co-orbital configurations of nearly equal-mass objects. However, as evidenced by the co-orbital objects detected by transit photometry in the WD 1145+017 system, these bodies are largely unconstrained in size, mass, and total number (multiplicity). Motivated by potential future similar discoveries, we perform N-body simulations to demonstrate if and how debris masses and multiplicity may be bounded due to second-to-minute deviations and the resulting accumulated phase shifts in the osculating orbital period amongst multiple co-orbital equal point masses. We establish robust lower and upper mass bounds as a function of orbital period deviation, but find the constraints on multiplicity to be weak. We also quantify the fuzzy instability boundary, and show that mutual collisions occur in less than 5%, 10% and 20% of our simulations for masses of 10^{21}, 10^{22} and 10^{23} kg. Our results may provide useful initial rough constraints on other stellar systems with multiple co-orbital bodies.
Item Type: | Journal Article | ||||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
Library of Congress Subject Headings (LCSH): | Protoplanetary disks, Asteroids, Celestial mechanics | ||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||
Publisher: | Oxford University Press | ||||||||||
ISSN: | 0035-8711 | ||||||||||
Official Date: | 11 September 2016 | ||||||||||
Dates: |
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Volume: | 461 | ||||||||||
Number: | 2 | ||||||||||
Page Range: | pp. 1413-1420 | ||||||||||
DOI: | 10.1093/mnras/stw1324 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Date of first compliant deposit: | 7 June 2016 | ||||||||||
Date of first compliant Open Access: | 23 August 2016 | ||||||||||
Funder: | Seventh Framework Programme (European Commission) (FP7), European Research Council (ERC), Science and Technology Facilities Council (Great Britain) (STFC) | ||||||||||
Grant number: | FP/2007-2013 (FP7), 320964 (ERC), ST/L000733 (STFC) |
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