A5024461475- Astro and Planetary Science
- Planetary Science and Exploration
- Astrophysics and Star Formation Studies
- Isotope Analysis in Ecology
- Stellar, planetary, and galactic studies
- Spacecraft and Cryogenic Technologies
- Space Exploration and Technology
- Geological and Geochemical Analysis
- Gamma-ray bursts and supernovae
- High-pressure geophysics and materials
- Space Satellite Systems and Control
- Advanced Chemical Physics Studies
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
Queen's University Belfast
2020-2023
Observations show that 100-km-class Kuiper belt objects (KBOs) can be divided in (at least) two color groups, hereafter red (R, g-i<1.2) and very (VR, g-i>1.2), reflecting a difference their surface composition. This is thought to imply KBOs formed over relatively wide range of radial distance, r. The cold classicals at 42<r<47 au are predominantly VR known Neptune Trojans r=30 mostly R. Intriguingly, however, the dynamically hot mix R colors no correlation with Here we perform...
Abstract We report on our detailed characterization of Earth’s second known temporary natural satellite, or minimoon, asteroid 2020 CD 3 . An artificial origin can be ruled out based its area-to-mass ratio and broadband photometry, which suggest that it is a silicate belonging to the S V complex in taxonomy. The discovery allows for first time comparison between minimoons theoretical models their expected physical dynamical properties. estimated diameter <?CDATA ${1.2}_{-0.2}^{+0.4}$?> m...
Abstract The Colors of the Outer Solar System Origins Survey (Col-OSSOS) has gathered a high-quality, near-simultaneous, and brightness-complete sample ( g − r ) J colors for 102 Kuiper Belt objects (KBOs) with u z some. We present current state survey data analysis. Recognizing that optical most icy bodies broadly follow reddening curve, we new projection optical−near-IR (NIR) colors, which rectifies main nonlinear features in optical−NIR along ordinates. find evidence bifurcation projected...
Abstract In the present-day Kuiper Belt, number of compositional classes and orbital distributions these hold important cosmogonic implications for solar system. The Colours Outer Solar System Origins Survey (Col-OSSOS) recently showed that observed color distribution small ( H ⪆ 6) trans-Neptunian objects (TNOs) can be accounted by existence only two composition classes, named BrightIR FaintIR, where range colors in each class modeled as mixtures material end-members. Here, we combine...
Abstract Dynamically excited objects within the Kuiper Belt show a bimodal distribution in their surface colors, and these differing colors may be tracer of where formed. In this work, we explore radial color distributions primordial planetesimal disk implications for positions ice line/color transitions Belt’s progenitor populations. We combine full dynamical model evolution due to Neptune’s migration with precise measured by Colours Outer Solar System Origins Survey order examine true...
Abstract The distribution of surface classes resonant trans-Neptunian objects (TNOs) provides constraints on the protoplanetesimal disk and giant planet migration. To better understand surfaces TNOs, Colours Outer Solar System Origins Survey acquired multiband photometry 102 TNOs found that can be well described by two classifications: BrightIR FaintIR. These classifications both include optically red members are differentiated predominantly based whether their near-infrared spectral slope...
IntroductionSmall solar system objects may occasionally become captured temporarily by planets. Theoretical models (Granvik et al. 2012, Fedorets 2017) predict the existence of a steady-state population these objects, also known as minimoons, in Earth-Moon system. Only one minimoon, 2006 RH120 has been discovered until recently (Kwiatkowski 2009). Since minimoons spend significant amount time Earth&#8217;s vicinity, they have identified outstanding targets for situ exploration, or test...
The low-inclination component of the classical Kuiper Belt is thought to be only population trans-Neptunian bodies that formed in-situ (Parker et al., 2010). This population, often referred as cold objects, exhibits a&#160; ~30% observed binary fraction, much higher than for other objects (TNOs; Noll 2008). majority classicals belong Very Red (VR) class bimodal TNO compositional taxonomy (Fraser and Brown, 2012). Though recently, a Less (LR) members has been identified, exhibiting 100%...
The Colours of the Outer Solar System Origins Survey (Col-OSSOS, Schwamb et al., 2019) has examined surface compositions Kuiper Belt Objects (KBOs) by way broadband g-, r- and J-band photometry, using Gemini North Hawaii Telescope. This survey showed a bimodal distribution in colours objects surveyed, consistent with previous colour surveys (Tegler 2016). These can be considered proxy for composition these KBOs, so this allows frequency different within outer to explored. bimodality observed...
The distribution of surface classes resonant trans-Neptunian objects (TNOs) provides constraints on the protoplanetesimal disk and giant planet migration. To better understand surfaces TNOs, Colours Outer Solar System Origins Survey (Col-OSSOS) acquired multi-band photometry 102 found that TNOs can be well described by two classifications, BrightIR FaintIR. These classifications both include optically red members are differentiated predominantly based whether their near-infrared spectral...
In the present-day Kuiper Belt, number of compositional classes and orbital distributions these hold important cosmogonic implications for Solar System. a companion paper by Fraser et al., we demonstrate that observed color distribution small (H>6) Trans-Neptunian Objects (TNOs) can be accounted existence only two composition classes, named brightIR faintIR, where range colors in each class is governed mixture material end members. Here, investigate identified al. find inclinations objects...
&lt;p&gt;Beyond the orbit of Neptune lies a sea small icy bodies known as Kuiper belt. The surfaces these Belt Objects (KBOs) have remained relatively unprocessed since their formation consequence distance from Sun. This means that we can investigate conditions in early Solar System by studying today. Generally, and most numerous KBOs are quite dim (r mag &gt; 22), so it is difficult to study spectroscopically. Instead, use broadband photometry take effectively very...
Dynamically excited objects within the Kuiper belt show a bimodal distribution in their surface colors, and these differing colors may be tracer of where formed. In this work we explore radial color distributions primordial planetesimal disk implications for positions ice line/color transitions belt's progenitor populations. We combine full dynamical model evolution due to Neptune's migration with precise measured by Colours Outer Solar System Origins Survey order examine true ratios lines...
Within the outer Solar System exists Kuiper belt. This belt is made up of many icy planetesimals, remaining relics planet-forming bodies that failed to evolve into a planet beyond Neptune. The smaller members (with r mag > 22) generally show linear and featureless spectra. Additionally, due dimness these objects observing their spectra can be particularly difficult. Therefore, broadband photometry often used characterise surfaces. as proxy for composition, it provides enough information...