dc.date.accessioned | 2020-05-23T17:55:27Z | |
dc.date.available | 2020-05-23T17:55:27Z | |
dc.date.created | 2020-01-20T10:01:42Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Flekkøy, Eirik Grude Luu, Jane Toussaint, Renaud . The interstellar object ’Oumuamua as a fractal dust aggregate. Astrophysical Journal Letters. 2019, 885(2), L41 | |
dc.identifier.uri | http://hdl.handle.net/10852/76136 | |
dc.description.abstract | The first known interstellar object 'Oumuamua exhibited a nongravitational acceleration that appeared inconsistent with cometary outgassing, leaving radiation pressure as the most likely force. Barring the alien lightsail hypothesis, an ultra-low density due to a fractal structure might also explain the acceleration of 'Oumuamua by radiation pressure. In this Letter we report a decrease in 'Oumuamua's rotation period based on ground-based observations, and show that this spin-down can be explained by the YORP effect if 'Oumuamua is indeed a fractal body with the ultra-low density of 10−2 kg m−3. We also investigate the mechanical consequences of 'Oumuamua as a fractal body subjected to rotational and tidal forces, and show that a fractal structure can survive these mechanical forces. | en_US |
dc.language | EN | |
dc.publisher | Institute of Physics Publishing Ltd. | |
dc.title | The interstellar object ’Oumuamua as a fractal dust aggregate | en_US |
dc.type | Journal article | en_US |
dc.creator.author | Flekkøy, Eirik Grude | |
dc.creator.author | Luu, Jane | |
dc.creator.author | Toussaint, Renaud | |
cristin.unitcode | 185,15,4,98 | |
cristin.unitname | Porous Media Laboratory SFF | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 1777252 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astrophysical Journal Letters&rft.volume=885&rft.spage=L41&rft.date=2019 | |
dc.identifier.jtitle | Astrophysical Journal Letters | |
dc.identifier.volume | 885 | |
dc.identifier.issue | 2 | |
dc.identifier.doi | https://doi.org/10.3847/2041-8213/ab4f78 | |
dc.identifier.urn | URN:NBN:no-79263 | |
dc.subject.nvi | VDP::Astrofysikk, astronomi: 438 | |
dc.type.document | Tidsskriftartikkel | en_US |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 2041-8205 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/76136/1/Flekk%25C3%25B8y_2019_ApJL_885_L41.pdf | |
dc.type.version | PublishedVersion | |
cristin.articleid | L41 | |
dc.relation.project | NFR/262644 | |