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Title - Discovery and characterization of the first known interstellar object
By - Karen Meech et al, 2017
Summary - .
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Title - APO time resolved color photometry of highly-elongated interstellar object 1I/Oumuamua
By - Bryce Bolin et al, 2017
Summary - .
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Title - Interstellar Interloper 1I/2017 U1: Observations from the NOT and WIYN Telescopes
By - David Jewitt et al, 2017
Summary - .
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Title - Colors of the interstellar planetesimal 1I/Oumuamua
By - Michele Bannister et al, 2017
Summary - .
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Title - Tumbling motion of 1I/'Oumuamua reveals body's violent past
By - Michal Drahus et al, 2017
Summary - .
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By - Matthew Knight et al, 2017
Summary - .
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Title - Non-Gravitational Acceleration in the Trajectory of 1I/2017 U1 (ʻOumuamua)
By - Marco Micheli et al, 2018
Summary - .
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Title - What and Whence 1I/Oumuamua: A Contact Binary from the Debris of a Young Planetary System
By - Eric Gaidos, 2018
Summary - .
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Title - The tumbling rotational state of 1I/‘Oumuamua
By - Wesley Fraser et al, 2018
Summary - .
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Title - Could solar radiation pressure explain Oumuamua's peculiar acceleration?
By - Avi Loeb & Shmuel Bialy, 2018
Summary - .
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Title - On the Anomalous Acceleration of 1I/2017 U1 'Oumuamua
By - Darryl Seligman, Gregory Laughlin & Konstantin Batygin, 2019
Summary - Oumuamua experienced 10% mass loss during the 100 days span of its encounter with the inner solar system and had an icy composition.
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Title - Evidence that 1I/2017 U1 (`Oumuamua) was composed of molecular hydrogen ice
By - Darryl Seligman & Gregory Laughlin, 2020
Summary - Hydrogen iceberg. Darryl himself called it a stupid idea in March 2023.
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Title - Destruction of molecular hydrogen ice and Implications for 1I/2017 U1 (`Oumuamua)
By - Avi Loeb et al, 2020
Summary - Harvard scientist Avi Loeb critiques Darryl Seligman's paper above.
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Title - Acceleration of 1I/`Oumuamua from radiolytically produced H2 in H2O ice
By - Jennifer Bergner & Darryl Seligman, March 2023
Summary - Hydrogen gas pockets within water iceberg. Both authors have very silly, unscientific view of comets & Darryl, on Twitter, refuses to answer skeptical questions & furnish evidence behind his bogus claims.
News - NPR article, Berkley, My Twitter thread criticizing this paper.
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Title - 1I/'Oumuamua as an N2 ice fragment of an exo-Pluto surface: I. size and compositional constraints
By - Alan Jackson & Steven Desch, 2021
Summary - Nitrogen iceberg, part 1. Cigar shape crucial to their theory. " We looked at several different ices and the push they would give ‘Oumuamua as they evaporated. We found that the best ice is nitrogen (N2), which would explain many of the things we know about it. Oumuamua was small, about half as long as a city block and only as thick as a three story building, but it was very shiny. The shininess is about the same as the surfaces of Pluto and Triton, which are also covered in nitrogen ice. We suggest Oumuamua was probably thrown out of a young star system about half a billion years ago. "
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By - Steven Desch & Alan Jackson, 2021
Summary - Nitrogen iceberg, part 2. Another version of the paper here. There were thousands of bodies like Pluto, in another solar system, with N2 ice on their surfaces, and this instability would have generated trillions of N2 ice fragments. A similar fragment, generated in another solar system, after traveling for about a half billion years through interstellar space, would match the size, shape, brightness, and dynamics of the interstellar object 1I/‘Oumuamua. There are hints that some N2 ice fragments may have survived in the Oort cloud of comets in our Solar System.
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Title - To see a world in a shard of ice: Oumuamua as a fragment of N2 ice from an exo-Pluto
By - Alan Jackson & Steven Desch, 2021
Summary - Above link shows abstract only. PDF here.
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Title - The Frequency of Oumuamua-Like Interstellar Objects
By - Steven Desch & Alan Jackson, 2022
Summary - All observed features of the first interstellar object, Oumuamua, are satisfactorily explained if it was a collisional fragment of an exo-Pluto, made mostly of N2 ice. This matches its compositional constraints (no detectable H2O, CO, CO2, or dust), its albedo and color, its extreme axis ratios (due to > 95% mass loss as it rounded the Sun), and in particular exactly matches its non-gravitational acceleration.
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Title - 1I/'Oumuamua: A sample of an exo-Pluto, and the nearest exoplanet
By - Steven Desch & Alan Jackson, 2022
Summary - 1I/'Oumuamua ... It had no dust tail or observed emission from H2O, CO, etc. (N2 was be invisible). Its non-gravitational acceleration varied as 1/d^2, as comets do from sublimation of ices, but 10 times greater than typical. From light curves, its shape was a disk with extreme axis ratios 6:6:1. We show all these mysteries are resolved if 'Oumuamua was a ~45m × 44m × 7.5m fragment of N2 ice, as seen on Pluto. Such fragments were necessarily ejected during the Solar System's dynamical instability. Pluto's surface ice would match all constraints on 'Oumuamua's composition. The albedo, etc., of N2 ice exactly matches its observed non-gravitational acceleration. The predicted ~92% mass loss at perihelion exactly explains its extreme shape. We suggest 'Oumuamua was ejected from an exo-Pluto in a young stellar system in the Perseus arm ~0.5 Gyr ago.
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Title - Oumuamua as a Cometary Fractal Aggregate: The "Dust Bunny" Model
By - Jane Luu et al, 2020
Summary - Oumuamua's properties could be explained as those of a fractal dust aggregate (a "dust bunny") formed in the inner coma of a fragmenting exo-Oort cloud comet.
News - Phys.org, My Twitter thread criticizing this paper.
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Title - Tidal fragmentation as the origin of 1I/2017 U1 (‘Oumuamua)
By - Yun Zhang et al, 2020
Summary - This paper relies on numerical simulations & pseudoscience, to explain ridiculous cigar shape interpretation of Oumuamua. Extracts - Planetesimal parent bodies originated well outside the snow line (at a few AU) are likely to have icy/rocky composition similar to that of the comets [Bogus claim - which comet is icy ?]. The enhancement of cohesion due to sintering of silicates in the crusts leads to more extreme shapes like 1:10 or less, with sizes around 100 m. [ Yun believes in the pseudoscience method of lightcurve inversion ].
Our numerical simulations show that Oumuamua-like ISOs can be prolifically produced through extensive tidal fragmentation and ejected during close encounters of their volatile-rich parent bodies with their host stars. Material strength enhanced by the intensive heating during periastron passages enables the emergence of extremely elongated triaxial ISOs with shape c/a ≲ 1/10, sizes a∼100 m, and rocky surfaces.
Although volatiles with low sublimation temperature (such as CO) are concurrently depleted, H2O buried under surfaces is preserved in these ISOs, providing an outgassing source without measurable cometary activities for Oumuamua's non-gravitational accelerations during its passage through the inner Solar System.
During the span of observation (from Oct 19, 2017 to Jan 2, 2018), the surface temperature of Oumuamua varies from 350 K to 200 K (77 C to -73 C).
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Title - Predicting the water content of interstellar objects from galactic star formation histories
By - Chris Lintott, Michele Bannister, Ted Mackereth, 2021
Summary - This paper reveals the pseudoscientific beliefs of all the 3 scientists.
News - Thread by Chris Lintott, Thread by Michele Bannister
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Title - Modelling the light curve of ‘Oumuamua: evidence for torque and disc-like shape
By - Sergey Mashchenko, 2019
Summary - Paper considers both conventional brightness models (Lommel–Seeliger triaxial ellipsoid) and alternative models too (‘black-and-white ball’, ‘solar sail’). Best-fitting models are a thin disc (aspect ratio 1:6) and a thin cigar (aspect ratio 1:8) that are very close to being axially symmetric. Both models are tumbling and require some torque. Cigar-shaped models suffer from a fine-tuning problem and have only 16% probability to produce light-curve minima as deep as the ones present in Oumuamua’s light curve. Disc-shaped models have 91% probability of producing a minima of the required depth.
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