Browsing Research publications by Author "Horner, J."

Now showing items 1-6 of 6

    • The Anglo-Australian planet search XXI : a gas-giant planet in a one year orbit and the habitability of gas-giant satellites 

      Tinney, C. G.; Wittenmyer, Robert A.; Butler, R. Paul; Jones, H.R.A.; O'Toole, Simon J.; Bailey, Jeremy A.; Carter, Brad D.; Horner, J. (2011-05-01)
      We have detected the Doppler signature of a gas-giant exoplanet orbiting the star HD 38283, in an eccentric orbit with a period of almost exactly one year (P = 363.2 +/- 1.6 d, m sin i = 0.34 +/- 0.02 M-Jup, e = 0.41 +/- ...

    • The Anglo-Australian planet search. XXII : Two new multi-planet systems 

      Wittenmyer, Robert A.; Horner, J.; Tuomi, Mikko; Salter, G. S.; Tinney, C.G.; Butler, R. P.; Jones, H.R.A.; O'Toole, S. J.; Bailey, J.; Carter, B. D.; Jenkins, J. S.; Zhang, Z.; Vogt, S. S.; Rivera, Eugenio J. (2012-07-10)
      We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting HD 142 has a period of 6005 +/- 427 days, ...

    • The frequency of low-mass exoplanets III. Toward eta-Earth at short periods 

      Wittenmyer, Robert A.; Tinney, C. G.; Butler, R. P.; O'Toole, Simon J.; Jones, H.R.A.; Carter, B. D.; Bailey, J.; Horner, J. (2011-09)
      Determining the occurrence rate of "super-Earth" planets (m sin i < 10 M ) is a critically important step on the path toward determining the frequency of Earth-like planets (η), and hence the uniqueness of our solar system. ...

    • The GALAH Survey : Non-LTE departure coefficients for large spectroscopic surveys 

      Amarsi, A. M.; Lind, K.; Osorio, Y.; Nordlander, T.; Bergemann, M.; Reggiani, H.; Wang, E. X.; Buder, S.; Asplund, M.; Barklem, P. S.; Wehrhahn, A.; Skúladóttir, Á.; Kobayashi, C.; Karakas, A. I.; Gao, X. D.; Bland-Hawthorn, J.; Silva, G. M. De; Kos, J.; Lewis, G. F.; Martell, S. L.; Sharma, S.; Simpson, J. D.; Zucker, D. B.; Čotar, K.; Horner, J.; collaboration, the GALAH (2020-10-06)
      Massive sets of stellar spectroscopic observations are rapidly becoming available and these can be used to determine the chemical composition and evolution of the Galaxy with unprecedented precision. One of the major ...

    • Observing Strategies for the Detection of Jupiter Analogs 

      Wittenmyer, Robert A.; Tinney, C.G.; Horner, J.; Butler, R. P.; Jones, H.R.A.; O'Toole, Simon J.; Bailey, J.; Carter, Brad D.; Salter, G. S.; Wright, D. (2013-04)
      To understand the frequency, and thus the formation and evolution, of planetary systems like our own solar system, it is critical to detect Jupiter-like planets in Jupiter-like orbits. For long-term radial-velocity monitoring, ...

    • Signals embedded in the radial velocity noise: Periodic variations in the tau Ceti velocities 

      Tuomi, Mikko; Jones, H.R.A.; Jenkins, James Stewart; Tinney, C.G.; Butler, R.P.; Vogt, Steven S.; Barnes, John; Wittenmyer, Robert A.; O'Toole, S.; Horner, J.; Bailey, J.; Carter, B.D.; Wright, D. J.; Salter, G. S.; Pinfield, D.J. (2013-03)
      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 term ...