• A terrestrial planet candidate in a temperate orbit around Proxima Centauri 

      Anglada-Escude, Guillem; Amado, Pedro J.; Barnes, John; Berdinas, Zaira M.; Butler, R. Paul; Coleman, Gavin A. L.; Cueva, Ignacio de la; Dreizler, Stefan; Endl, Michael; Giesers, Benjamin; Jeffers, Sandra V.; Jenkins, James Stewart; Jones, Hugh R. A.; Kiraga, Marcin; Kuerster, Martin; López González, María J.; Marvin, Christopher J.; Morales, Nicolás; Morín, Julien; Nelson, Richard P.; Ortiz, José L.; Ofir, Aviv; Paardekooper, Sijme-Jam; Reiners, Ansgar; Rodríguez, Eloy; Rodríguez López, Cristina; Sarmiento, Luis F.; Strachan, John P.; Tsapras, Yiannis; Tuomi, Mikko; Zechmeister, Mathias (Nature, 2016)
      At a distance of 1.295 parsecs(1), the red dwarf Proxima Centauri (a Centauri C, GL 551, HIP 70890 or simply Proxima) is the Sun's closest stellar neighbour and one of the best-studied low-mass stars. It has an effective ...
    • Bayesian search for low-mass planets around nearby M dwarfs – estimates for occurrence rate based on global detectability statistics 

      Jenkins, James Stewart; Tuomi, Mikko; Jones, Hugh R. A.; Barnes, John R.; Anglada Escudé, Guillem (Oxford University Press, 2014)
      Due to their higher planet–star mass ratios, M dwarfs are the easiest targets for detection of low-mass planets orbiting nearby stars using Doppler spectroscopy. Furthermore, because of their low masses and luminosities, ...
    • Benchmark cool companions: ages and abundances for the PZ Telescopii system 

      Jenkins, James Stewart; Pavlenko, Y. V.; Ivanyuk, O.; Gallardo, J.; Jones, M. I.; Day-Jones, A. C.; Jones, H. R. A.; Ruiz González, María Teresa; Pinfield, D. J.; Yakovina, L. (WILEY-BLACKWELL, 2012-03)
      We present new ages and abundance measurements for the pre-main-sequence star PZ Telescopii (more commonly known as PZ Tel). PZ Tel was recently found to host a young and low-mass companion. Such companions, whether they ...
    • A deep WISE search for very late type objects and the discovery of two halo/thick-disc T dwarfs: WISE 0013+0634 and WISE 0833+0052 

      Pinfield, D. J.; Gomes, J.; Day Jones, A. C.; Leggett, S. K.; Gromadzki, M.; Burningham, B.; Ruiz González, María Teresa; Kurtev, R.; Cattermole, T.; Cardoso, C.; Lodieu, N.; Faherty, J.; Littlefair, S.; Irwin, M.; Clarke, J. R. A.; Smith, L.; Lucas, P. W.; Gálvez Ortiz, M. C.; Jenkins, James Stewart; Rebolo, L.; Béjar, V. J. S.; Gauza, B. (Oxford University Press, 2014)
      A method is defined for identifying late-T and Y dwarfs in WISE down to low values of signalto- noise. This requires a WISE detection only in theW2-band and uses the statistical properties of the WISE multiframe measurements ...
    • Detection of a magnetic field in three old and inactive solar-like planet-hosting stars 

      Fossati, L.; Kochukhov, O.; Jenkins, James Stewart; Stancliffe, R. J.; Haswell, C. A.; Elmasli, A.; Nickson, E. (2013)
      Aims. Our understanding of magnetic fields in late-type stars is strongly driven by what we know of the solar magnetic field. For this reason, it is crucial to understand how typical the solar dynamo is. To do this we ...
    • Discovery of a T dwarf plus white dwarf binary system 

      Day-Jones, A. C.; Pinfield, D. J.; Ruiz González, María Teresa; Beaumont, H.; Burningham, B.; Gallardo, J.; Gianninas, A.; Bergeron, P.; Napiwotzki, R.; Jenkins, James Stewart; Zhang, Z. H.; Murray, D. N.; Catalán, S.; Gomes, J. (WILEY-BLACKWELL, 2011-01)
      We present the discovery of the first T dwarf + white dwarf binary system LSPM 1459+0857 AB, confirmed through common proper motion and spectroscopy. The white dwarf is a high proper motion object from the LSPM catalogue ...
    • A dynamically-packed planetary system around GJ 667C with three super-Earths in its habitable zone 

      Anglada Escudé, Guillem; Tuomi, Mikko; Gerlach, Enrico; Barnes, Rory; Heller, René; Jenkins, James Stewart; Wende, Sebastian; Vogt, Steven S.; Butler, R. Paul; Reiners, Ansgar; Jones, Hugh R. A. (EDP Sciences, 2013-08)
      Context. Since low-mass stars have low luminosities, orbits at which liquid water can exist on Earth-sized planets are relatively close-in, which produces Doppler signals that are detectable using state-of-the-art Doppler ...
    • Giant planets around two intermediate-mass evolved stars and confirmation of the planetary nature of HIP 67851c 

      Jones, M. I.; Jenkins, James Stewart; Rojo Rubke, Patricio; Melo, C. H. F. (EDP Sciences, 2015)
      Context. Precision radial velocities are required to discover and characterize exoplanets. Optical spectra that exhibit many hundreds of absorption lines can allow the m s(-1) precision levels required for this work. After ...
    • Giant planets around two intermediate-mass evolved stars and confirmation of the planetary nature of HIP 67851c 

      Rojo Rubke, Patricio; Jenkins, James Stewart; Jones, M.; Olivares, F.; Melo, C. (EDP Sciences, 2015)
      Context. Precision radial velocities are required to discover and characterize exoplanets. Optical spectra that exhibit many hundreds of absorption lines can allow the m s-1 precision levels required for this work. After ...
    • Improved signal detection algorithms for unevenly sampled data. Six signals in the radial velocity data for GJ876 

      Rojo Rubke, Patricio Michel; Jenkins, James Stewart; Becerra Yoma, Néstor; Mahu, R.; Wuth Sepúlveda, Jorge Iván. (Montlhy Notices of The Royal Society Astronomy, 2014-04-04)
      The hunt for Earth analogue planets orbiting Sun-like stars has forced the introduction of novel methods to detect signals at, or below, the level of the intrinsic noise of the observations. We present a new global ...
    • A long-period planet orbiting a nearby Sun-like star 

      Jones, Hugh; Butler, R. Paul; Tinney, C. G.; O’Toole, Simon; Wittenmyer, Rob; Henry, Gregory W.; Meschiari, Stefano; Vogt, Steve; Rivera, Eugenio; Laughlin, Greg; Carter, Brad D.; Bailey, Jeremy; Jenkins, James Stewart (2010)
      The Doppler wobble induced by the extra-solar planet HD 134987b was first detected by data from the Keck Telescope nearly a decade ago, and was subsequently confirmed by data from the Anglo-Australian Telescope (AAT). ...
    • No evidence of the planet orbiting the extremely metal-poor extragalactic star HIP 13044 

      Jones, M. I.; Jenkins, James Stewart (ESO, 2014)
      Context. The recent discovery of three giant planets orbiting the extremely metal-poor stars HIP 11952 and HIP 13044 have challenged theoretical predictions of the core-accretion model. According to this, the metal content ...
    • The observed distribution of spectroscopic binaries from the Anglo-Australian Planet Search 

      Jenkins, James Stewart; Díaz, M.; Jones, H. R. A.; Butler, R. P.; Tinney, C. G.; O’Toole, S. J.; Carter, B. D.; Wittenmyer, R. A.; Pinfield, D. J. (Oxford University Press, 2015)
      We report the detection of sixteen binary systems from the Anglo-Australian Planet Search. Solutions to the radial velocity data indicate that the stars have companions orbiting with a wide range of masses, eccentricities ...
    • A planetary system and a highly eccentric brown dwarf around the giant stars HIP 67851 and HIP 97233 

      Jones, M.; Jenkins, James Stewart; Rojo Rubke, Patricio; Melo, C.; Bluhm, P. (EDP Sciences, 2015)
      Context. So far more than 60 substellar companions have been discovered around giant stars. These systems present physical and orbital properties that contrast with those detected orbiting less evolved stars. Aims. We ...
    • A planetary system and a highly eccentric brown dwarf around the giant stars HIP 67851 and HIP 97233 

      Rojo Rubke, Patricio; Jenkins, James Stewart; Melo, C.; Bluhm, P. (EDP Sciences, 2015)
      Context. So far more than 60 substellar companions have been discovered around giant stars. These systems present physical and orbital properties that contrast with those detected orbiting less evolved stars. Aims. We are ...
    • Precision radial velocities of 15 M5–M9 dwarfs 

      Rojo Rubke, Patricio Michel; Jenkins, James Stewart; Jones, H.R.A.; Jeffers, S. V.; Arriagada, P.; Jordán, A.; Minniti, D.; Tuomi, M.; Pinfield, D.; Anglada-Escudé, G. (Royal Astronomical Society, 2014-02-20)
      We present radial velocity measurements of a sample of M5V–M9V stars from our Red-Optical Planet Survey, operating at 0.652–1.025 µm. Radial velocities for 15 stars, with rms precision down to 2.5 m s−1 over a week-long ...
    • The properties of planets around giant stars 

      Rojo Rubke, Patricio Michel; Jenkins, James Stewart; Bluhm, P.; Melo, H. F. (2014-12-23)
      Context. More than 50 exoplanets have been found around giant stars, revealing different properties when compared to planets orbiting solar-type stars. In particular, they are super-Jupiters and are not found orbiting ...
    • RAFT - I. Discovery of new planetary candidates and updated orbits from archival FEROS spectra 

      Soto, M. G.; Jenkins, James Stewart; Jones Fernández, Matías Ignacio (Oxford University Press, 2015)
      A recent reanalysis of archival data has lead several authors to arrive at strikingly different conclusions for a number of planet-hosting candidate stars. In particular, some radial velocities (RVs) measured using Fiber-fed ...
    • A search for southern ultracool dwarfs in young moving groups 

      Clarke, J. R. A.; Pinfield, D. J.; Gálvez Ortiz, M. C.; Jenkins, James Stewart; Burningham, B.; Deacon, N. R.; Jones, Hugh; Pokorny, R. S.; Barnes, J. R.; Day-Jones, A. C. (2010)
      We associate 132 low-mass ultracool dwarfs in the southern hemisphere as candidate members of five moving groups (MGs) using photometric and astrometric selection techniques. Of these objects, we present high-resolution ...
    • Signals embedded in the radial velocity noise Periodic variations in the τ Ceti velocities 

      Tuomi, M.; H. R., A. Jones; Jenkins, James Stewart; Tinney, C. G.; Butler, R. P.; Vogt, S. S.; Barnes, J. R.; Wittenmyer, R. A.; O’Toole, S.; Horner, J.; Bailey, J.; Carter, B. D.; Wright, D. J.; Salter, G. S.; Pinfield, D. (EDP Sciences, 2013)
      Context. The abilities of radial velocity exoplanet surveys to detect the lowest-mass extra-solar planets are currently limited by a combination of instrument precision, lack of data, and “jitter”. Jitter is a general ...