Browsing by Author "Jenkins, James Stewart"

Now showing items 21-37 of 37

    • 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 
      Jones, M. I.; 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 are ...
    • Precision radial velocities of 15 M5–M9 dwarfs 
      Barnes, J. R.; Jenkins, James Stewart; Jones, H.R.A.; Jeffers, S. V.; Rojo Rubke, Patricio; Arriagada, P.; Jordán, A.; Minniti, D.; Tuomi, M.; Pinfield, D. J.; Anglada Escudé, Guillem (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 
      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 ...
    • Propiedades Físicas y Cinemáticas de Estrellas de la Vecindad Solar Pertenecientes al Hemisferio Sur 
      Murgas Alcaíno, Felipe Andrés (Universidad de ChileCyberDocs, 2010)
    • 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 ...
    • SALT observations of the chromospheric activity of transiting planet hosts: Mass-loss and star-planet interactions 
      Staab, D.; Haswell, C. A.; Smith, Gareth D.; Fossati, L.; Barnes, J. R.; Busuttil, R.; Jenkins, James Stewart (Oxford University, 2017)
      We measured the chromospheric activity of the four hot Jupiter hosts WASP-43, WASP-51/HAT-P-30, WASP-72 and WASP-103 to search for anomalous values caused by the close-in companions. The Mount Wilson CaIIH&KS-index was ...
    • 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.; Jones, H. R. A.; 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 ...
    • Six transiting planets and a chain of Laplace resonances in TOI-178 
      Leleu, A.; Alibert, Y.; Hara, N. C.; Hooton, M. J.; Wilson, T. G.; Robutel, P.; Delisle, J. B.; Laskar, J.; Hoyer, S.; Lovis, C.; Bryant, E. M.; Ducrot, E.; Cabrera, J.; Delrez, L.; Acton, J. S.; Adibekyan, V.; Allart, R.; Allende Prieto, C.; Alonso, R.; Alves, D.; Anderson, D. R.; Angerhausen, D.; Anglada Escudé, G.; Asquier, J.; Barrado, D.; Barros, S. C. C.; Baumjohann, W.; Bayliss, D.; Beck, M.; Beck, T.; Bekkelien, A.; Benz, W.; Billot, N.; Bonfanti, A.; Bonfils, X.; Bouchy, F.; Bourrier, V.; Boué, G.; Brandeker, A.; Broeg, C.; Buder, M.; Burdanov, A.; Burleigh, M. R.; Bárczy, T.; Cameron, A. C.; Chamberlain, S.; Charnoz, S.; Cooke, B. F.; Corral Van Damme, C.; Correia, A. C. M.; Cristiani, S.; Damasso, M.; Davies, M. B.; Deleuil, M.; Demangeon, O. D. S.; Demory, B. O.; Di Marcantonio, P.; Di Persio, G.; Dumusque, X.; Ehrenreich, D.; Erikson, A.; Figueira, P.; Fortier, A.; Fossati, L.; Fridlund, M.; Futyan, D.; Gandolfi, D.; García Muñoz, A.; Garcia, L. J.; Gill, S.; Gillen, E.; Gillon, M.; Goad, M. R.; González Hernández, J. I.; Guedel, M.; Günther, M. N.; Haldemann, J.; Henderson, B.; Heng, K.; Hogan, A. E.; Isaak, K.; Jehin, E.; Jenkins, James Stewart; Jordán, A.; Kiss, L.; Kristiansen, M. H.; Lam, K.; Lavie, B.; Lecavelier Des Etangs, A.; Lendl, M.; Lillo Box, J.; Lo Curto, G.; Magrin, D.; Martins, C. J. A. P.; Maxted, P. F. L.; McCormac, J.; Mehner, A.; Micela, G.; Molaro, P.; Moyano, M.; Murray, C. A.; Nascimbeni, V.; Nunes, N. J.; Olofsson, G.; Osborn, H. P.; Oshagh, M.; Ottensamer, R.; Pagano, I.; Pallé, E.; Pedersen, P. P.; Pepe, F. A.; Persson, C. M.; Peter, G.; Piotto, G.; Polenta, G.; Pollacco, D.; Poretti, E.; Pozuelos, F. J.; Queloz, D.; Ragazzoni, R.; Rando, N.; Ratti, F.; Rauer, H.; Raynard, L.; Rebolo, R.; Reimers, C.; Ribas, I.; Santos, N. C.; Scandariato, G.; Schneider, J.; Sebastian, D.; Sestovic, M.; Simon, A. E.; Smith, A. M. S.; Sousa, S. G.; Sozzetti, A.; Steller, M.; Suárez Mascareño, A.; Szabó, Gy. M.; Ségransan, D.; Thomas, N.; Thompson, S.; Tilbrook, R. H.; Triaud, A.; Turner, O.; Udry, S.; Van Grootel, V.; Venus, H.; Verrecchia, F.; Vines, J. I.; Walton, N. A.; West, R. G.; Wheatley, P. J.; Wolter, D.; Zapatero Osorio, M. R. (EDP Sciences, 2021)
      Determining the architecture of multi-planetary systems is one of the cornerstones of understanding planet formation and evolution. Resonant systems are especially important as the fragility of their orbital configuration ...
    • Spectroscopic signatures of youth in low-mass kinematic candidates of young moving groups 
      Gálvez Ortiz, M. C.; Kuznetsov, M.; Clarke, J. R. A.; Pavlenko, Ya. V.; Folkes, S. L.; Pinfield, D. J.; Jones, H. R. A.; Jenkins, James Stewart; Barnes, J. R.; Burningham, B.; Day Jones, A. C.; Martín, E. L.; García Pérez, A. E.; Burgo, C. del; Pokorny, R. S. (Oxford University Press, 2014)
      We present a study of age-related spectral signatures observed in 25 young low-mass objects that we have previously determined as possible kinematic members of five young moving groups: the Local Association (Pleiades ...
    • Starspot Distributions on Fully Convective M DWARFS: Implications for Radial Velocity Planet Searches 
      Barnes, J.; Jeffers, S.; Jones, H.; Pavlenko, Ya; Jenkins, James Stewart; Haswell, C.; Lohr, M. (IOP, 2015)
      Since M4.5–M9 dwarfs exhibit equatorial rotation velocities of the order of 10 km s−1 on average, radial velocity surveys targeting this stellar population will likely need to find methods to effectively remove starspot ...
    • Stellar activity as a tracer of moving groups 
      Murgas, F.; Jenkins, James Stewart; Rojo Rubke, Patricio; Jones, H. R.; Pinfield, D. J. (EDP Sciences, 2013)
      We present the results of a study of the stellar activity in the solar neighborhood using complete kinematics (galactocentric velocities U, V, W) and the chromospheric activity index log R0 HK. We analyzed the average ...
    • 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 sub-stellar birth rate from UKIDSS 
      Day Jones, A. C.; Marocco, F.; Pinfield, D. J.; Zhang, Z. H.; Burningham, B.; Deacon, N.; Ruiz González, María Teresa; Gallardo, J.; Jones, H. R. A.; Lucas, P. W.; Jenkins, James Stewart; Gomes, J.; Folkes, S. L.; Clarke, J. R. A. (Oxford University Press on behalf of the Royal Astronomical Society, 2013)
      We present a new sample of mid-L to mid-T dwarfs with effective temperatures of 1100– 1700 K selected from the UKIDSS Large Area Survey (LAS) and confirmed with infrared spectra from X-shooter/Very Large Telescope . This ...
    • 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 ...
    • Unmasking the hidden NGTS-3Ab: A hot Jupiter in an unresolved binary system 
      Günther, Maximilian N.; Queloz, Didier; Gillen, Edward; Delrez, Laetitia; Bouchy, François; McCormac, James; Smalley, Barry; Almleaky, Yaseen; Armstrong, David J.; Bayliss, Daniel; Burdanov, Artem; Burleigh, Matthew; Cabrera, Juan; Casewell, Sarah L.; Cooke, Benjamin F; Csizmadia, Szilárd; Ducrot, Elsa; Eigmuller, Philipp; Erikson, Anders; Gänsicke, Boris; Gibsonq, Neale; Gillon, Michaël; Goad, Michael; Jehin, Emmanuël; Jenkins, James Stewart; Louden, Tom; Moyano, Maximiliano; Murray, Catriona; Pollacco, Don; Poppenhaeger, Katja; Rauer, Heike; Raynard, Liam; Smith, Alexis; Sohy, Sandrine; Thompson, Samantha; Udry, Stéphane; Watson, Christopher; West, Richard; Wheatley, Peter (Oxford University Press, 2018)
      We present the discovery of NGTS-3Ab, a hot Jupiter found transiting the primary star of an unresolved binary system. We develop a joint analysis of multi-colour photometry, centroids, radial velocity (RV) cross-correlation ...