Dr. Cheng, Yu-Chi: "Discovery of a New Retrograde Trans-Neptunian Object: Hint of a Common Orbital Plane for Low Semimajor Axis, High-inclination TNOs and Centaurs"

時間/地點: 2016-12-15 12:00 [S4-914]

期刊來源:Chen, Ying-Tung; Lin, Hsing Wen (The Astrophysical Journal Letters)


Although the majority of Centaurs are thought to have originated in the scattered disk, with the high-inclination members coming from the Oort cloud, the origin of the high-inclination component of trans-Neptunian objects (TNOs) remains uncertain. We report the discovery of a retrograde TNO, which we nickname "Niku," detected by the Pan-STARRS 1 Outer Solar System Survey. Our numerical integrations show that the orbital dynamics of Niku are very similar to that of 2008 KV42(Drac), with a half-life of ~500 Myr. Comparing similar high-inclination TNOs and Centaurs (q > 10 au, a < 100 au, and i > 60°), we find that these objects exhibit a surprising clustering of ascending node, and occupy a common orbital plane. This orbital configuration has high statistical significance: 3.8-σ. An unknown mechanism is required to explain the observed clustering. This discovery may provide a pathway to investigating a possible reservoir of high-inclination objects.


2016-12-15Dr. Cheng, Yu-ChiDiscovery of a New Retrograde Trans-Neptunian Object: Hint of a Common Orbital Plane for Low Semimajor Axis, High-inclination TNOs and Centaurs
2016-12-08Prof. Chou, YiDiscovery of a new accreting millisecond X-ray pulsar in the globular cluster NGC 2808
2016-11-24Lin, Hsing-WenConsequences of a Distant Massive Planet on the Large Semi-major Axis Trans-Neptunian Objects
2016-10-20Mr. Po-Shih ChiangSpiral density waves in a young protoplanetary disk
2016-10-13Mr. Lee, Chien-DePan-STARRS and PESSTO search for an optical counterpart to the LIGO gravitational-wave source GW150914
2016-05-26Mr. Huang, Jen-Chao.Radio continuum detection in blue early-type weak emission line galaxies
2016-05-12Research Assistant Chang,Chan-KaoA 2 km-size asteroid challenging the rubble-pile spin barrier - A case for cohesion
2016-04-28 Manash Ranjan SamalEpisodic molecular outflow in the very young protostellar cluster Serpens South
2016-04-21Po-Chieh, YuALMA resolves the torus of NGC 1068: continuum and molecular line emission
2016-04-07Prof. Chen, Wen-PingWISEA J114724.10-204021.3: A Free-Floating Planetary Mass Member of the TW Hya Association
2016-03-10Lee, Chien-DeProperties of the binary black hole merger GW150914
2016-03-10Lee, Chien-DeProperties of the binary black hole merger GW150914
2016-02-25姜博識 Po-Shih ChiangAn all-sky Support Vector Machine selection of WISE YSO Candidates.
2015-12-31周翊 Yi ChouA possible cyclotron resonance scattering feature near 0.7 keV in X1822-371
2015-12-10田雍 Yong TianStatistical Method on Astrophysics – Local Regression Method
2015-11-26木下大輔 Kinoshita DaisukeObservations of “fresh” and weathered surfaces on asteroid pairs and their implications on the rotational-fission mechanism
2015-10-29鄭宇棋 Yu-Chi ChengThe NEOWISE-Discovered Comet Population and the CO+CO2 production rates
2015-10-08姜博識 Po-Shih ChiangDiscovery and spectroscopy of the young Jovian planet 51 Eri b with the Gemini Planet Imager
2015-10-01林省文 Hsing-Wen LinSpace Weathering Trends Among Carbonaceous Asteroids
2015-05-29木下大輔 Daisuke KinoshitaSpectral properties of the largest asteroids associated with Taurid Complex
2015-05-14章展誥 Chan-Kao Chang29 November 2011 stellar occultation by 2060 Chiron: Symmetric jet-like features
2015-04-30林怡伶 I-Ling LinOngoing hydrothermal activities within Enceladus
2015-04-09林省文 Dr. Hsing-Wen LinPlanet heating prevents inward migration of planetary cores
2015-03-19田雍 Yong TianDynamics of Elliptical Galaxies with Planetary Nebulae in the MOdified Newtonian Dynamics
2015-01-08蘇羿豪 Yi-Hao SuPractices in source code sharing in astrophysics
2014-12-25林怡伶 I-Ling LinThe Secret Lives of Cepheids: Evolutionary Changes and Pulsation-Induced Shock Heating in the Prototype Classical Cepheid δ Cep
2014-12-18陳以忱 I-Chenn ChenJ1649+26: A Grand-Design Spiral with a Large Double-Lobed Radio Source
2014-12-04楊庭彰 Ting-Chang YangSDSS J001153.08-064739.2, a Cataclysmic Variable with an Evolved Donor in the Period Gap
2014-11-27黃立晴 Li-Ching HuangKepler Flares I. Active and Inactive M dwarfs
2014-11-06李建德 Chien-De LeeHow tiny galaxies form stars
2014-10-30黃仁昭 Jen-Chao Huang Relics of Galaxy Merging: Observational Predictions for a Wandering Massive Black Hole and Accompanying Star Cluster in the Halo of M31
2014-10-16鄭宇棋 Yu-Chi ChengDust environment and dynamical history of a sample of short-period comets
2014-10-09謝宗富 Zong-Fu SieThe host galaxy and late-time evolution of the Super-Luminous Supernova PTF12dam
2014-10-02姜博識 Po-Shin ChiangGender-based Systematics in HST Proposal Selection
2014-06-05Yi-Hao SuBlack hole spin measurements through the relativistic precession model: XTE J1550-564
2014-05-29Po-Chieh YuNASA's WISE Findings Poke Hole in Black Hole 'Doughnut' Theory
2014-05-15An-Li TsaiSuppression of star formation in the galaxy NGC 253 by a starburst-driven molecular wind
2014-05-08Chan-Kao ChangA ring system detected around the Centaur (10199) Chariklo
2014-05-01Ching-Ping LinFound: the progenitors of AM CVn and supernovae .Ia
2014-04-24Ting-Chang YangA millisecond pulsar in a stellar triple system
2014-03-27Hsing-Wen LinDark Matter as a trigger for Periodic Comet Impacts
2014-03-20Zhong-Yi LinThe water production rate of Rosetta target Comet 67P/Churyumov-Gerasimenko near perihelion in 1996, 2002 and 2009 from Lyman α observations with SWAN/SOHO
2014-03-13Daisuke KinoshitaThe internal structure of asteroid (25143) Itokawa as revealed by detection of YORP spin-up
2014-03-06Po-Shih ChiangA global cloud map of the nearest known brown dwarf
2014-01-02Yi ChouSwings between rotation and accretion power in a binary millisecond pulsar
2013-12-26Chien-Cheng LinEvaluating Gyrochronology on the Zero-Age-Main-Sequence: Rotation Periods in the Southern Open Cluster Blanco 1 from the KELT-South Survey
2013-12-12I-Chenn ChenStar formation and AGN activity in interacting galaxies: a near-UV perspective
2013-12-05Chin-Ping HuA long-term X-ray monitoring of the ultraluminous X-ray source NGC 5408 X-1 with Swift reveals the presence of dips but no orbital period
2013-11-28Li-Ching HuangA rocky composition for an Earth-sized exoplanet
2013-11-28Lin TuA high-amplitude thermal inertia anomaly of probable magnetospheric origin on Saturn’s moon Mimas
2013-10-31Wen-Ping ChenA SCUBA-2 850-μm survey of protoplanetary discs in the σ Orionis cluster
2013-10-24Jen-Chao HuangA high Eddington-ratio, true Seyfert 2 galaxy candidate: implications for broad-line region models
2013-10-03Chandler LeeA study of Be stars in the Magellanic Clouds
2013-09-25Prof. Wing-Huen IpIn Situ Observations of Interstellar Plasma With Voyager 1