Browsing by Author "Jones, M. I."

Now showing items 1-7 of 7

    • Analysis of combined radial velocities and activity of BD+20 1790: evidence supporting the existence of a ... 
      Hernán Obispo, M.; Tuomi, M.; Gálvez Ortiz, M. C.; Golovin, A.; Barnes, J. R.; Jones, H. R. A.; Kane, S. R.; Pinfield, D.; Jenkins, James Stewart; Petit, P.; Anglada Escudé, Guillem; Marsden, S. C.; Catalán, S.; Jeffers, S. V.; Castro, E. de; Cornide, M.; Garcés, A.; Jones, M. I.; Gorlova, N.; Andreev, M. (EDP Sciences, 2015)
      Context. In a previous paper we reported a planetary companion to the young and very active K5Ve star BD+20 1790. We found that this star has a high level of stellar activity (log R HK = −3.7) that manifests in a plethora ...
    • 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 ...
    • 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 ...
    • 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 properties of planets around giant stars 
      Jones, M. I.; Jenkins, James Stewart; Bluhm, P.; Rojo Rubke, Patricio; 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 ...
    • Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets. II. A giant ... 
      Jones, M. I.; Jenkins, James Stewart; Rojo, P.; Melo, C. H.; Bluhm, P. (EDP Sciences, 2013)
      Context. More than 40 planets have been found around giant stars, revealing a lack of systems orbiting interior to ∼0.6 AU. This observational fact contrasts with the planetary population around solar-type stars and has ...
    • The Pan-Pacific Planet Search. VII. the Most Eccentric Planet Orbiting a Giant Star 
      Wittenmyer, Robert A.; Jones, M. I.; Horner, Jonathan; Kane, Stephen R.; Marshall, J. P.; Mustill, A. J.; Jenkins, James Stewart; Pena Rojas, P. A.; Zhao, Jinglin; Villaver, Eva; Butler, R. P.; Clark, Jake (IOP Publishing, 2017)
      Radial velocity observations from three instruments reveal the presence of a 4 M Jup planet candidate orbiting the K giant HD 76920. HD 76920b has an orbital eccentricity of 0.856 ±0.009, making it the most eccentric planet ...