# Interstellar Interlopers: Number Density and Origin of ‘Oumuamua-like Objects

@article{Do2018InterstellarIN,
title={Interstellar Interlopers: Number Density and Origin of ‘Oumuamua-like Objects},
author={Aaron Do and Michael A. Tucker and John L. Tonry},
journal={The Astrophysical Journal Letters},
year={2018},
volume={855}
}
• Published 9 January 2018
• Physics, Geology
• The Astrophysical Journal Letters
We provide a calculation of Pan-STARRS’ ability to detect objects similar to the interstellar object 1I/2017 U1 (hereafter ‘Oumuamua), including the most detectable approach vectors and the effect of object size on detection efficiency. Using our updated detection cross section, we infer an interstellar number density of such objects ( ). This translates to a mass density of that cannot be populated unless every star is contributing. We find that, given current models, such a number density…
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