Could 1I/’Oumuamua be an Icy Fractal Aggregate?

@article{MoroMartin2019Could1B,
  title={Could 1I/’Oumuamua be an Icy Fractal Aggregate?},
  author={Amaya Moro-Mart'in},
  journal={The Astrophysical Journal},
  year={2019}
}
  • A. Moro-Mart'in
  • Published 11 February 2019
  • Geology, Physics
  • The Astrophysical Journal
1I/'Oumuamua was the first interstellar interloper that has been detected and it showed a non-gravitational acceleration (Micheli et al. 2018) that cannot be accounted for by outgassing, given the strict upper limits to outgassing resulting from Spitzer observations, unless the relative abundances of the common volatiles are very different from those in comets (Trilling et al. 2018). As an alternative, Bialy & Loeb (2018) have suggested that its peculiar acceleration is due to radiation… 

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References

SHOWING 1-10 OF 37 REFERENCES
Origin of 1I/’Oumuamua. II. An Ejected Exo-Oort Cloud Object?
1I/'Oumuamua is the first detected interstellar interloper. We test the hypothesis that it is representative of a background population of exo-Oort cloud objects ejected under the effect of post-main
1I/'Oumuamua is tumbling
The discovery of 1I/2017 U1 ('Oumuamua) has provided the first glimpse of a planetesimal born in another planetary system. This interloper exhibits a variable colour, within a range that is broadly
Could Solar Radiation Pressure Explain ‘Oumuamua’s Peculiar Acceleration?
'Oumuamua (1I/2017 U1) is the first object of interstellar origin observed in the solar system. Recently, Micheli et al. reported that 'Oumuamua showed deviations from a Keplerian orbit at a high
Origin of 1I/’Oumuamua. I. An Ejected Protoplanetary Disk Object?
1I/'Oumuamua is the first interstellar interloper to have been detected. Because planetesimal formation and ejection of predominantly icy objects are common by-products of the star and planet
Constraints on the Density and Internal Strength of 1I/'Oumuamua
1I/'Oumuamua was discovered by the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS 1) on 19 October 2017. Unlike all previously discovered minor planets this object was determined to
The origin of interstellar asteroidal objects like 1I/2017 U1
With the recently discovered interstellar object 1I/2017U1 (1I/'Oumuamua) we have to realize that the Solar System is not isolated, but part of a larger environment with which we interact. We compare
Interstellar Interlopers: Number Density and Origin of ‘Oumuamua-like Objects
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
Interstellar Interloper 1I/2017 U1: Observations from the NOT and WIYN Telescopes
We present observations of the interstellar interloper 1I/2017 U1 ('Oumuamua) taken during its 2017 October flyby of Earth. The optical colors B-V = 0.70$\pm$0.06, V-R = 0.45$\pm$0.05, overlap those
Tumbling motion of 1I/‘Oumuamua and its implications for the body’s distant past
Models of the Solar System’s evolution show that almost all the primitive material leftover from the formation of the planets was ejected to the interstellar space as a result of dynamical
Spin Evolution and Cometary Interpretation of the Interstellar Minor Object 1I/2017 ’Oumuamua
  • R. Rafikov
  • Physics, Geology
    The Astrophysical Journal
  • 2018
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...
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3
4
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