The tumbling rotational state of 1I/'Oumuamua

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F18%3A00494943" target="_blank" >RIV/67985815:_____/18:00494943 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1038/s41550-018-0398-z" target="_blank" >http://dx.doi.org/10.1038/s41550-018-0398-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41550-018-0398-z" target="_blank" >10.1038/s41550-018-0398-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The tumbling rotational state of 1I/'Oumuamua

Popis výsledku v původním jazyce

The discovery1 of 1I/2017 U1 (1I/'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 consistent with local small bodies, such as the P- and D-type asteroids, Jupiter Trojans and dynamically excited Kuiper belt objects(2-7). 1I/'Oumuamua appears unusually elongated in shape, with an axial ratio exceeding 5: 1 (refs(1,4,5,8)). Rotation period estimates are inconsistent and varied, with reported values between 6.9 and 8.3 h (refs(4-6,9)). Here, we analyse all the available optical photometry data reported to date. No single rotation period can explain the exhibited brightness variations. Rather, 1I/'Oumuamua appears to be in an excited rotational state undergoing non-principal axis rotation, or tumbling. A satisfactory solution has apparent lightcurve frequencies of 0.135 and 0.126 h(-1) and implies a longest-to-shortest axis ratio of. 5: 1, although the available data are insufficient to uniquely constrain the true frequencies and shape. Assuming a body that responds to non-principal axis rotation in a similar manner to Solar System asteroids and comets, the timescale to damp 1I/'Oumuamua's tumbling is at least one billion years. 1I/'Oumuamua was probably set tumbling within its parent planetary system and will remain tumbling well after it has left ours.

Název v anglickém jazyce

The tumbling rotational state of 1I/'Oumuamua

Popis výsledku anglicky

The discovery1 of 1I/2017 U1 (1I/'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 consistent with local small bodies, such as the P- and D-type asteroids, Jupiter Trojans and dynamically excited Kuiper belt objects(2-7). 1I/'Oumuamua appears unusually elongated in shape, with an axial ratio exceeding 5: 1 (refs(1,4,5,8)). Rotation period estimates are inconsistent and varied, with reported values between 6.9 and 8.3 h (refs(4-6,9)). Here, we analyse all the available optical photometry data reported to date. No single rotation period can explain the exhibited brightness variations. Rather, 1I/'Oumuamua appears to be in an excited rotational state undergoing non-principal axis rotation, or tumbling. A satisfactory solution has apparent lightcurve frequencies of 0.135 and 0.126 h(-1) and implies a longest-to-shortest axis ratio of. 5: 1, although the available data are insufficient to uniquely constrain the true frequencies and shape. Assuming a body that responds to non-principal axis rotation in a similar manner to Solar System asteroids and comets, the timescale to damp 1I/'Oumuamua's tumbling is at least one billion years. 1I/'Oumuamua was probably set tumbling within its parent planetary system and will remain tumbling well after it has left ours.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA17-00774S" target="_blank" >GA17-00774S: Fyzikální vlastnosti a evoluční procesy subkilometrových asteroidů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nature Astronomy

ISSN

2397-3366

e-ISSN

—

Svazek periodika

2

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

4

Strana od-do

383-386

Kód UT WoS článku

000434351700017

EID výsledku v databázi Scopus

2-s2.0-85046377809