On the dynamical history of the interstellar object 'Oumuamua?

Abstract

1I/2017 U1 'Oumuamua is the first interstellar object recorded inside the Solar System. We try to answer the main question: where does it come from? To this aim we searched for close encounters between 'Oumuamua and all nearby stars with known kinematic data during their past motion.We had checked over 200 thousand stars and found just a handful of candidates. If we limit our investigation to within a 60 pc sphere surrounding the Sun, then the most probable candidate for the 'Oumuamua parent stellar habitat is the star UCAC4 535-065571. However GJ 876 is also a favourable candidate. Moreover, the origin of 'Oumuamua from a much more distant source is still an open question. Additionally, we found that the quality of the original orbit of 'Oumuamua is accurate enough for such a study and that none of the checked stars had perturbed its motion significantly. All numerical results of this research are available in the Appendix.

11 pages, 4 main tables and 3 tables with data, 8 figures, accepted for publication in A&A (v.4: rewritten and figures added)

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Cited by in corpus (18)

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• The Natural History of 'Oumuamua
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• The Feasibility and Benefits of In Situ Exploration of `Oumuamua-like objects
• The Dynamics of Interstellar Asteroids and Comets within the Galaxy: an Assessment of Local Candidate Source Regions for 1I/`Oumuamua and 2I/Borisov
• Origin of 1I/'Oumuamua. I. An ejected protoplanetary disk object?
• The Excited Spin State of 1I/2017 U1 `Oumuamua
• Jets in Hydrogen-poor Super-luminous Supernovae: Constraints from a Comprehensive Analysis of Radio Observations
• Oort cloud Ecology II: Extra-solar Oort clouds and the origin of asteroidal interlopers
• Plausible home stars of the interstellar object 'Oumuamua found in Gaia DR2
• From a Different Star: 3I/ATLAS in the context of the Ōtautahi-Oxford interstellar object population model
• Dust bombardment can explain the extremely elongated shape of 1I/'Oumuamua and the lack of interstellar objects
• Predicting Interstellar Object Chemodynamics with Gaia
• New Insights into Interstellar Object 1I/2017 U1 (`Oumuamua) from SOHO/STEREO Nondetections
• Oumuamuas passing through molecular clouds
• GTC/CanariCam deep mid-infrared imaging survey of northern stars within 5 pc
• Research Programs Arising from 'Oumuamua Considered as an Alien Craft
• A Catalogue of Interstellar Material Delivery From Nearby Debris Disks