Browsing by Author "O'Toole, S. J."

Now showing items 1-8 of 8

    • 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 Anglo-Australian planet search. XXIII. Two new jupiter analogs 

      Wittenmyer, Robert A.; Horner, Jonathan; Tinney, C. G.; Butler, R. P.; Jones, H. R A; Salter, G. S.; Carter, B. D.; Koch, F. Elliott; O'Toole, S. J.; Bailey, J.; Wright, D.; Tuomi, Mikko (2014-03-10)
      We report the discovery of two long-period giant planets from the Anglo-Australian Planet Search. HD 154857c is in a multiple-planet system, while HD 114613b appears to be solitary. HD 114613b has an orbital period P = ...

    • Cool Jupiters greatly outnumber their toasty siblings : Occurrence rates from the Anglo-Australian Planet Search 

      Wittenmyer, Robert A.; Wang, Songhu; Horner, Jonathan; Butler, R. P.; Tinney, C. G.; Carter, B. D.; Wright, D. J.; Jones, H. R. A.; Bailey, J.; O'Toole, S. J.; Johns, Daniel (2020-02-01)
      Our understanding of planetary systems different to our own has grown dramatically in the past 30 yr. However, our efforts to ascertain the degree to which the Solar system is abnormal or unique have been hindered by the ...

    • A detailed analysis of the HD 73526 2:1 resonant planetary system 

      Wittenmyer, Robert A.; Tan, Xianyu; Lee, Man Hoi; Horner, Jonathan; Tinney, C.G.; Butler, R. P.; Salter, G. S.; Carter, B. D.; Jones, H.R.A.; O'Toole, S. J.; Bailey, J.; Wright, D.; Crane, J. D.; Schectman, S. A.; Arriagada, P.; Thompson, I.; Minniti, D.; Diaz, M. (2014-01-10)
      We present six years of new radial velocity data from the Anglo-Australian and Magellan Telescopes on the HD 73526 2:1 resonant planetary system. We investigate both Keplerian and dynamical ( interacting) fits to these ...

    • Forever alone? : Testing single eccentric planetary systems for multiple companions 

      Wittenmyer, Robert A.; Wang, Songhu; Horner, Jonathan; Tinney, C.G.; Butler, R. P.; Jones, H.R.A.; O'Toole, S. J.; Bailey, J.; Carter, B. D.; Salter, G. S.; Wright, D.; Zhou, Ji-Lin (2013-09)
      Determining the orbital eccentricity of an extrasolar planet is critically important for understanding the system's dynamical environment and history. However, eccentricity is often poorly determined or entirely mischaracterized ...

    • GJ 832c : A super-earth in the habitable zone 

      Wittenmyer, Robert A.; Tuomi, Mikko; Butler, R. P.; Jones, Hugh; Anglada-Escudé, Guillem; Horner, Jonathan; Tinney, C. G.; Marshall, J. P.; Carter, B. D.; Bailey, J.; Salter, G. S.; O'Toole, S. J.; Wright, D.; Crane, J. D.; Schectman, S. A.; Arriagada, P.; Thompson, I.; Minniti, D.; Jenkins, J. S.; Diaz, M. (2014-08-05)
      We report the detection of GJ 832c, a super-Earth orbiting near the inner edge of the habitable zone of GJ 832, an M dwarf previously known to host a Jupiter analog in a nearly circular 9.4 yr orbit. The combination of ...

    • MUCHFUSS - massive unseen companions to hot faint underluminous stars from SDSS 

      Geier, S.; Schaffenroth, V.; Hirsch, H.; Tillich, A.; Heber, U.; Maxted, P. F. L.; Ostensen, R. H.; Barlow, B. N.; O'Toole, S. J.; Kupfer, T.; Marsh, T.; Gaensicke, B.; Napiwotzki, R.; Cordes, O.; Mueller, S.; Classen, L.; Ziegerer, E.; Drechsel, H. (2012-06)
      The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars with massive compact companions (white dwarfs with masses M > 1.0 M?, neutron stars or black ...

    • The observed distribution of spectroscopic binaries from the Anglo-Australian Planet Search 

      Jenkins, J. S.; Díaz, M.; Jones, Hugh; Butler, R. P.; Tinney, Chris G.; O'Toole, S. J.; Carter, B.D.; Wittenmyer, R.; Pinfield, David (2015-10-21)
      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 ...