M. J. Lehner
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View article: TAOS II: The Transneptunian Automated Occultation Survey
TAOS II: The Transneptunian Automated Occultation Survey Open
The Transneptunian Automated Occultation Survey (TAOS II) will operate three 1.3 meter telescopes at the Observatorio Astronómico Nacional at San Pedro Mártir in Baja California, México to search for serendipitous occultations of stars by …
View article: Discovery and dynamics of a Sedna-like object with a perihelion of 66 au
Discovery and dynamics of a Sedna-like object with a perihelion of 66 au Open
Trans-Neptunian objects (TNOs) with large perihelion distances ($q > 60$ au) and semi-major axes ($a > 200$ au) provide insights into the early evolution of the solar system and the existence of a hypothetical distant planet. These objects…
View article: The two rings of (50000) Quaoar (<i>Corrigendum</i>)
The two rings of (50000) Quaoar (<i>Corrigendum</i>) Open
International audience
View article: FOSSIL. III. Lightcurves of 371 Trans-Neptunian Objects
FOSSIL. III. Lightcurves of 371 Trans-Neptunian Objects Open
From the first phase of the high-cadence Formation of the Outer Solar System: an Icy Legacy (FOSSIL) survey, we analyzed lightcurves, ranging from one to four nights in length, of 371 trans-Neptunian objects (TNOs) for periodicity. We foun…
View article: COLOUR TRANSITIONS IN THE PRIMORDIAL
COLOUR TRANSITIONS IN THE PRIMORDIAL Open
International audience
View article: Unusual Neutral Colored/BrightIR Surfaces in the Kuiper Belt
Unusual Neutral Colored/BrightIR Surfaces in the Kuiper Belt Open
International audience
View article: The two rings of (50000) Quaoar
The two rings of (50000) Quaoar Open
Context. Quaoar is a classical trans-Neptunian object (TNO) with an area-equivalent diameter of 1100 km and an orbital semi-major axis of 43.3 astronomical units. Based on stellar occultations observed between 2018 and 2021, an inhomogeneo…
View article: A low-inclination neutral Trans-Neptunian Object in a extreme orbit
A low-inclination neutral Trans-Neptunian Object in a extreme orbit Open
We present photometric observations and numerical simulations of 2016 SD$_{106}$, a low inclination ($i=4.8^{\circ}$) extreme trans-Neptunian Object with a large semi-major axis ($a=350$ au) and perihelion ($q= 42.6$ au). This object posse…
View article: A Low-inclination Neutral Trans-Neptunian Object in an Extreme Orbit
A Low-inclination Neutral Trans-Neptunian Object in an Extreme Orbit Open
We present photometric observations and numerical simulations of 2016 SD 106 , a low-inclination ( i = 4.°8) extreme trans-Neptunian Object with a large semimajor axis ( a = 350 au) and perihelion ( q = 42.6 au). This object possesses a pe…
View article: Exploring Variability within the Col-OSSOS Sample
Exploring Variability within the Col-OSSOS Sample Open
<p>Beyond the orbit of Neptune lies a sea of small icy bodies known as the Kuiper belt. The surfaces of these Kuiper Belt Objects (KBOs) have remained relatively unprocessed since their formation as a consequence of their distance fr…
View article: Simultaneous Detection of Optical Flares of the Magnetically Active M-dwarf Wolf359
Simultaneous Detection of Optical Flares of the Magnetically Active M-dwarf Wolf359 Open
We present detections of stellar flares of Wolf 359, an M6.5 dwarf in the solar neighborhood (2.41 pc) known to be prone to flares due to surface magnetic activity. The observations were carried out from 2020 April 23 to 29 with a 1 m and …
View article: FOSSIL. II. The Rotation Periods of Small-sized Hilda Asteroids
FOSSIL. II. The Rotation Periods of Small-sized Hilda Asteroids Open
Using the high-cadence lightcurves collected from the FOSSIL survey, rotation periods of 17 small (diameter 1 km < D < 3 km) Hilda asteroids (hereinafter Hildas) were obtained. Combined with the previously measured rotation periods of Hild…
View article: Col-OSSOS: Probing Ice Line/Color Transitions within the Kuiper Belt’s Progenitor Populations
Col-OSSOS: Probing Ice Line/Color Transitions within the Kuiper Belt’s Progenitor Populations Open
Dynamically excited objects within the Kuiper belt show a bimodal distribution in their surface colors, and these differing surface colors may be a tracer of where these objects formed. In this work we explore radial color distributions in…
View article: Col-OSSOS: Probing Ice Line/Color Transitions within the Kuiper Belt’s Progenitor Populations
Col-OSSOS: Probing Ice Line/Color Transitions within the Kuiper Belt’s Progenitor Populations Open
Dynamically excited objects within the Kuiper Belt show a bimodal distribution in their surface colors, and these differing surface colors may be a tracer of where these objects formed. In this work, we explore radial color distributions i…
View article: Col-OSSOS: Probing Ice Line/Color Transitions within the Kuiper Belt's Progenitor Populations
Col-OSSOS: Probing Ice Line/Color Transitions within the Kuiper Belt's Progenitor Populations Open
Dynamically excited objects within the Kuiper belt show a bimodal distribution in their surface colors, and these differing surface colors may be a tracer of where these objects formed. In this work we explore radial color distributions in…
View article: OSSOS. XXIII. 2013 VZ<sub>70</sub> and the Temporary Coorbitals of the Giant Planets
OSSOS. XXIII. 2013 VZ<sub>70</sub> and the Temporary Coorbitals of the Giant Planets Open
We present the discovery of 2013 VZ 70 , the first known horseshoe coorbital companion of Saturn. Observed by the Outer Solar System Origins Survey for 4.5 yr, the orbit of 2013 VZ 70 is determined to high precision, revealing that it curr…
View article: Long-term Dynamical Stability in the Outer Solar System. I. The Regular and Chaotic Evolution of the 34 Largest Trans-Neptunian Objects
Long-term Dynamical Stability in the Outer Solar System. I. The Regular and Chaotic Evolution of the 34 Largest Trans-Neptunian Objects Open
We carried out an extensive analysis of the stability of the outer solar system, making use of the frequency analysis technique over short-term integrations of nearly 100,000 test particles, as well as a statistical analysis of 200 1 Gyr l…
View article: FOSSIL. I. The Spin Rate Limit of Jupiter Trojans
FOSSIL. I. The Spin Rate Limit of Jupiter Trojans Open
Rotation periods of 53 small (diameters 2 km < D < 40 km) Jupiter Trojans (JTs) were derived using the high-cadence lightcurves obtained by the FOSSIL phase I survey, a Subaru/Hyper Suprime-Cam intensive program. These are the first report…
View article: TAOS II: THE ROBOTIC OPERATIONS
TAOS II: THE ROBOTIC OPERATIONS Open
In this work, we present the general procedure for the robotic observations of the Transneptunian Automated Occultation Survey (TAOS II). The project aims to detect small TNOs (Transneptunian Objects) by serendipitous stellar occultations.…
View article: Col-OSSOS: Investigating Outlying Surfaces within the Kuiper Belt's Neutral Coloured Objects
Col-OSSOS: Investigating Outlying Surfaces within the Kuiper Belt's Neutral Coloured Objects Open
Within the outer Solar System exists the Kuiper belt. This Kuiper belt is made up of many icy planetesimals, the remaining relics of planet-forming bodies that failed to evolve into a planet beyond Neptune. The smaller members of the Kuipe…
View article: FOSSIL: I. The Spin Rate Limit of Jupiter Trojans
FOSSIL: I. The Spin Rate Limit of Jupiter Trojans Open
Rotation periods of 53 small (diameters $2 < D < 40$ km) Jupiter Trojans (JTs) were derived using the high-cadence light curves obtained by the FOSSIL phase I survey, a Subaru/Hyper Suprime-Cam intensive program. These are the first report…
View article: Col-OSSOS: The Distinct Color Distribution of Single and Binary Cold Classical KBOs
Col-OSSOS: The Distinct Color Distribution of Single and Binary Cold Classical KBOs Open
The cold classical Kuiper Belt Objects (KBOs) possess a high, ≳30% binary fraction. Widely separated and dynamically fragile, these binary systems have been useful in tracing the origins of KBOs. A new class of binaries was recently identi…
View article: Col-OSSOS: The Distinct Colour Distribution of Single and Binary Cold Classical KBOs
Col-OSSOS: The Distinct Colour Distribution of Single and Binary Cold Classical KBOs Open
The cold classical Kuiper Belt Objects (KBOs) possess a high, $\gtrsim30\%$ binary fraction. Widely separated and dynamically fragile, these binary systems have been useful in tracing the origins of KBOs. A new class of binaries was recent…
View article: The TAOS II Survey: Real-time Detection and Characterization of Occultation Events
The TAOS II Survey: Real-time Detection and Characterization of Occultation Events Open
The Transneptunian Automated Occultation Survey (TAOS II) is a blind occultation survey with the aim of measuring the size distribution of Trans-Neptunian Objects with diameters in the range of 0.3 ≲ D ≲ 30 km. TAOS II will observe as many…
View article: Col-OSSOS: Probing Ice Line/Colour Transitions within the Kuiper Belt's Progenitor Populations
Col-OSSOS: Probing Ice Line/Colour Transitions within the Kuiper Belt's Progenitor Populations Open
The Colours of the Outer Solar System Origins Survey (Col-OSSOS, Schwamb et al., 2019) has examined the surface compositions of Kuiper Belt Objects (KBOs) by way of broadband g-, r- and J-band photometry, using the Gemini North Hawaii Tele…
View article: Near-Simultaneous Optical + NIR Photometry of Interstellar Comet 2I/Borisov
Near-Simultaneous Optical + NIR Photometry of Interstellar Comet 2I/Borisov Open
In August 2019, 2I/Borisov, the second interstellar object and first visibly active interstellar comet, was discovered on a trajectory nearly perpendicular to the ecliptic. Observations of planet forming disks and debris disks serve as pro…
View article: The Colour Distribution Of The Low Inclination Trans-Neptunian Objects
The Colour Distribution Of The Low Inclination Trans-Neptunian Objects Open
The low-inclination component of the classical Kuiper Belt is thought to be the only population of trans-Neptunian bodies that formed in-situ (Parker et al., 2010). This population, often referred to as the cold classical objects, exhibits…
View article: OSSOS. XVIII. Constraining Migration Models with the 2:1 Resonance Using the Outer Solar System Origins Survey
OSSOS. XVIII. Constraining Migration Models with the 2:1 Resonance Using the Outer Solar System Origins Survey Open
Resonant dynamics plays a significant role in the past evolution and current state of our outer solar system. The population ratios and spatial distribution of Neptune’s resonant populations are direct clues to understanding the history of…
View article: The Contribution of Dwarf Planets to the Origin of Jupiter Family Comets
The Contribution of Dwarf Planets to the Origin of Jupiter Family Comets Open
We explore the long-term evolution of a bias-free orbital representation of the cometary nuclei (with diameters above 2 km) of the Kuiper Belt, using the so-called L7 synthetic model from CFEPS, which consists of three dynamical subpopulat…
View article: Col-OSSOS: The Colors of the Outer Solar System Origins Survey
Col-OSSOS: The Colors of the Outer Solar System Origins Survey Open
The Colours of the Outer Solar System Origins Survey (Col-OSSOS) is acquiring near-simultaneous $g$, $r$, and $J$ photometry of unprecedented precision with the Gemini North Telescope, targeting nearly a hundred trans-Neptunian objects (TN…