Browsing Research publications by Author "Jones, Hugh R. A."

Now showing items 21-32 of 32

    • `Oumuamua as a messenger from the Local Association 

      Feng, Fabo; Jones, Hugh R. A. (2018-01-09)
      With a hyperbolic trajectory around the Sun, 'Oumuamua is the first confirmed interstellar object. However, its origin is poorly known. By simulating the orbits of 0.23 million local stars, we find 109 encounters with ...

    • PEXO : a global modeling framework for nanosecond timing, microsecond astrometry, and μm/s radial velocities 

      Feng, Fabo; Lisogorskyi, Maksym; Jones, Hugh R. A.; Kopeikin, Sergei M.; Butler, R. Paul; Anglada-Escude, Guillem; Boss, Alan P. (2019-10-15)
      The ability to make independent detections of the signatures of exoplanets with complementary telescopes and instruments brings a new potential for robust identification of exoplanets and precision characterization. We ...

    • Probabilistic galactic dynamics I - the Sun and GJ 710 with Monte Carlo, linearised and unscented treatments 

      Feng, Fabo; Jones, Hugh R. A. (2018-12-07)
      Deterministic galactic dynamics is impossible due to the space-time randomness caused by gravitational waves. Instead of treating stellar orbits deterministically, we integrate not only the mean but also the covariance of ...

    • Projected Rotational Velocities for LAMOST Stars with Effective Temperatures Lower than 9000 K 

      Zuo, Fang; Luo, A-Li; Du, Bing; Li, Yinbi; Jones, Hugh R. A.; Song, Yi-han; Kong, Xiao; Guo, Yan-xin (2024-02-12)
      In Data Release 9 of LAMOST, we present measurements of v sin i for a total of 121,698 stars measured using the Medium Resolution Spectrograph (MRS) and 80,108 stars using the Low Resolution Spectrograph (LRS). These values ...

    • Revised Architecture and Two New Super-Earths in the HD 134606 Planetary System 

      Li, Zhexing; Kane, Stephen R.; Brandt, Timothy D.; Fetherolf, Tara; Robertson, Paul; Zhao, Jinglin; Dalba, Paul A.; Wittenmyer, Robert A.; Butler, R. Paul; Diaz, Matias R.; Howell, Steve B.; Bailey, Jeremy; Carter, Brad; Furlan, Elise; Gnilka, Crystal L.; Jones, Hugh R. A.; O'Toole, Simon; Tinney, Chris (2024-04-01)
      Multiplanet systems exhibit a diversity of architectures that diverge from the solar system and contribute to the topic of exoplanet demographics. Radial velocity (RV) surveys form a crucial component of exoplanet surveys, ...

    • Search for nearby Earth analogs I. 15 planet candidates found in PFS data 

      Feng, Fabo; Crane, Jeffrey D.; Wang, Sharon Xuesong; Teske, Johanna K.; Shectman, Stephen A.; Díaz, Matías R.; Thompson, Ian B.; Jones, Hugh R. A.; Butler, R. Paul (2019-06-17)
      The radial velocity (RV) method plays a major role in the discovery of nearby exoplanets. To efficiently find planet candidates from the data obtained in high-precision RV surveys, we apply a signal diagnostic framework ...

    • Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs 

      Feng, Fabo; Butler, R. Paul; Shectman, Stephen A.; Crane, Jeffrey D.; Vogt, Steve; Chambers, John; Jones, Hugh R. A.; Wang, Sharon Xuesong; Teske, Johanna K.; Burt, Jenn; Diaz, Matias R.; Thompson, Ian B. (2020-01-08)
      Zechmeister et al. surveyed 38 nearby M dwarfs from 2000 to 2007 March with VLT2 and the Ultraviolet and Visual Echelle Spectrograph (UVES) spectrometer. These data have recently been reanalyzed, yielding a significant ...

    • Stellar Atmospheric Parameters for Cool Dwarfs in Gaia Data Release 3 

      Qu, Cai-Xia; Luo, A-Li; Wang, Rui; Jones, Hugh R. A.; Du, Bing; Chen, Xiang-Lei; Wang, You-Fen (2024-02-01)
      We provide a catalog of atmospheric parameters for 1,806,921 cool dwarfs from Gaia Data Release 3 (DR3) that lie within the range covered by LAMOST cool dwarf spectroscopic parameters: 3200 K < T eff < 4300 K, −0.8 < [M/H] ...

    • Stellar Atmospheric Parameters of M-type Stars from LAMOST DR8 

      Ding, Ming-Yi; Shi, Jian-Rong; Wu, Yue; Jones, Hugh R. A.; Yan, Hong-liang; Li, Chun-Qian; Gao, Qi; Chen, Tian-Yi; Zhang, Jing-Hua; Liu, Shuai; Yan, Tai-Sheng; Xie, Xiao-Jin (2022-06-23)
      The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Low Resolution Spectroscopic Survey (LRS) provides massive spectroscopic data of M-type stars, and the derived stellar parameters could bring vital ...

    • Transits of Known Planets Orbiting a Naked-Eye Star 

      Kane, Stephen R.; Yalçınkaya, Selçuk; Osborn, Hugh P.; Dalba, Paul A.; Nielsen, Louise D.; Vanderburg, Andrew; Močnik, Teo; Hinkel, Natalie R.; Ostberg, Colby; Esmer, Ekrem Murat; Udry, Stéphane; Fetherolf, Tara; Baştürk, Özgür; Ricker, George R.; Vanderspek, Roland; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Allart, Romain; Bailey, Jeremy; Bean, Jacob L.; Bouchy, Francois; Butler, R. Paul; Campante, Tiago L.; Carter, Brad D.; Daylan, Tansu; Deleuil, Magali; Diaz, Rodrigo F.; Dumusque, Xavier; Ehrenreich, David; Horner, Jonathan; Howard, Andrew W.; Isaacson, Howard; Jones, Hugh R. A.; Kristiansen, Martti H.; Lovis, Christophe; Marcy, Geoffrey W.; Marmier, Maxime; O'Toole, Simon J.; Pepe, Francesco; Ragozzine, Darin; Ségransan, Damien; Tinney, C. G.; Turnbull, Margaret C.; Wittenmyer, Robert A.; Wright, Duncan J.; Wright, Jason T. (2020-09-01)
      Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit ...

    • Ultracool dwarfs identified using spectra in LAMOST DR7 

      Wang, You-Fen; Luo, A-Li; Chen, Wen-Ping; Jones, Hugh R. A.; Du, Bing; Li, Yin-Bi; Zhang, Shuo; Bai, Zhong-Rui; Kong, Xiao; Guo, Yan-Xin (2022-04-05)
      In this work, we identify 734 ultracool dwarfs with a spectral type of M6 or later, including one L0. Of this sample, 625 were studied spectroscopically for the first time. All of these ultracool dwarfs are within 360~pc, ...

    • Understanding Fomalhaut as a Cooper pair 

      Feng, Fabo; Jones, Hugh R. A. (2018-03-11)
      Fomalhaut is a nearby stellar system and has been found to be a triple based on astrometric observations. With new radial velocity and astrometric data, we study the association between Fomalhaut A, B, and C in a Bayesian ...