Dynamical Implantation of Blue Binaries in the Cold Classical Kuiper Belt
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10455236" target="_blank" >RIV/00216208:11320/22:10455236 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1BeLyD7iI2" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1BeLyD7iI2</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-3881/ac4bc9" target="_blank" >10.3847/1538-3881/ac4bc9</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Dynamical Implantation of Blue Binaries in the Cold Classical Kuiper Belt
Popis výsledku v původním jazyce
Colors and binarity provide important constraints on the Kuiper Belt formation. The cold classical objects at radial distance r = 42-47 au from the Sun are predominantly very red (spectral slope s > 17%) and often exist as equal-size binaries (similar to 30% observed binary fraction). This has been taken as evidence for the in situ formation of cold classicals. Interestingly, a small fraction (similar to 10%) of cold classicals is less red with s < 17%, and these "blue" bodies are often found in wide binaries. Here we study the dynamical implantation of blue binaries from r < 42 au. We find that they can be implanted into the cold classical belt from a wide range of initial radial distances, but the survival of the widest blue binaries-2001 QW322 and 2003 UN284-implies formation at r > 30 au. This would be consistent with the hypothesized less-red to very-red transition at 30 < r < 40 au. For any reasonable choice of parameters (Neptune's migration history, initial disk profile, etc.), however, our model predicts a predominance of blue singles, rather than blue binaries, which contradicts existing observations. We suggest that wide blue binaries formed in situ at r = 42-47 au and their color reflects early formation in a protoplanetary gas disk. The predominantly VR colors of cold classicals may be related to the production of methanol and other hydrocarbons during the late stages of the disk, when the temperature at 45 au dropped to similar or equal to 20 K and carbon monoxide was hydrogenated.
Název v anglickém jazyce
Dynamical Implantation of Blue Binaries in the Cold Classical Kuiper Belt
Popis výsledku anglicky
Colors and binarity provide important constraints on the Kuiper Belt formation. The cold classical objects at radial distance r = 42-47 au from the Sun are predominantly very red (spectral slope s > 17%) and often exist as equal-size binaries (similar to 30% observed binary fraction). This has been taken as evidence for the in situ formation of cold classicals. Interestingly, a small fraction (similar to 10%) of cold classicals is less red with s < 17%, and these "blue" bodies are often found in wide binaries. Here we study the dynamical implantation of blue binaries from r < 42 au. We find that they can be implanted into the cold classical belt from a wide range of initial radial distances, but the survival of the widest blue binaries-2001 QW322 and 2003 UN284-implies formation at r > 30 au. This would be consistent with the hypothesized less-red to very-red transition at 30 < r < 40 au. For any reasonable choice of parameters (Neptune's migration history, initial disk profile, etc.), however, our model predicts a predominance of blue singles, rather than blue binaries, which contradicts existing observations. We suggest that wide blue binaries formed in situ at r = 42-47 au and their color reflects early formation in a protoplanetary gas disk. The predominantly VR colors of cold classicals may be related to the production of methanol and other hydrocarbons during the late stages of the disk, when the temperature at 45 au dropped to similar or equal to 20 K and carbon monoxide was hydrogenated.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10308 - Astronomy (including astrophysics,space science)
Návaznosti výsledku
Projekt
<a href="/cs/project/GA21-11058S" target="_blank" >GA21-11058S: Raný orbitální a chemický vývoj planetárních soustav</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
The Astronomical Journal
ISSN
0004-6256
e-ISSN
1538-3881
Svazek periodika
163
Číslo periodika v rámci svazku
3
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
7
Strana od-do
137
Kód UT WoS článku
000757615200001
EID výsledku v databázi Scopus
2-s2.0-85125754080