Browsing by Author "Butler, R. P."

Now showing 1 - 7 of 7
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    A DETAILED ANALYSIS OF THE HD 73526 2:1 RESONANT PLANETARY SYSTEM
    (2014) Wittenmyer, R. A.; Tan, X. Y.; Lee, M. H.; Díaz, Marco A.; Horner, J.; 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.
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    A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESS
    (2020) Astudillo Defru, N.; Cloutier, R.; Wang, S. X.; Teske, J.; Brahm Scott, Rafael; Hellier, C.; Ricker, G.; Vanderspek, R.; Latham, D.; Seager, S.; Winn, J. N.; Jenkins, J. M.; Collins, K. A.; Stassun, K. G.; Ziegler, C.; Almenara, J. M.; Anderson, D. R.; Artigau, E.; Bonfils, X.; Bouchy, F.; Briceño, C.; Butler, R. P.; Charbonneau, D.; Conti, D. M.; Crane, J.; Crossfield, I. J. M.; Davies, M.; Delfosse, X.; Díaz, R. F.; Doyon, R.; Dragomir, D.; Eastman, J. D.; Espinoza, N.; Essack, Z.; Feng, F.; Figueira, P.; Forveille, T.; Gan, T.; Glidden, A.; Guerrero, N.; Hart, R.; Henning, T.; Horch, E. P.; Isopi, G.; Jenkins, J. S.; Jordán, A.; Kielkopf, J. F.; Law, N.; Lovis, C.; Mallia, F.
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    HATS-47b, HATS-48Ab, HATS-49b, and HATS-72b : Four Warm Giant Planets Transiting K Dwarfs
    (2020) Hartman, J. D.; Jordán Colzani, Andrés Cristóbal; Bayliss, D.; Bakos, G. A.; Bento, J.; Bhatti, W.; Brahm Scott, Rafael; Csubry, Z.; Espinoza, N.; Henning, T.; Mancini, L.; Penev, K.; Rabus, Markus; Sarkis, P.; Suc, V.; de Val-Borro, M.; Zhou, G.; Crane, J. D.; Shectman, S.; Teske, J. K.; Wang, S. X.; Butler, R. P.; Lazar, J.; Papp, I.; Sari, P.; Anderson, D. R.; Hellier, C.; West, R. G.; Barkaoui, K.; Pozuelos, F. J.; Jehin, E.; Gillon, M.; Nielsen, L.; Lendl, M.; Udry, S.; Ricker, G. R.; Vanderspek, R.; Latham, D. W.; Seager, S.; Winn, J. N.; Christiansen, J.; Crossfield, I. J. M.; Henze, C. E.; Jenkins, J. M.; Smith, J. C.; Ting, E. B.
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    HATS-6b: A warm Saturn transiting an early M dwarf star, and a set of empirical relations for characterizing K and M dwarf planet hosts
    (2015) Hartman, J. D.; Bayliss, D.; Brahm, R.; Bakos, G. Á.; Mancini, L.; Jordán Colzani, Andrés Cristóbal; Penev, K.; Rabus, Markus; Zhou, G.; Butler, R. P.; Espinoza, N.; de Val-Borro, M.; Bhatti, W.; Csubry, Z.; Ciceri, S.; Henning, T.; Schmidt, B.; Arriagada, P.; Shectman, S.; Crane, J.; Thompson, I.; Suc, V.; Csák, B.; Tan, T. G.; Noyes, R. W.; Lázár, J.; Papp, I.; Sári, P.
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    HATS-71b : A Giant Planet Transiting an M3 Dwarf Star in TESS Sector 1
    (2020) Bakos, G. A.; Bayliss, D.; Bento, J.; Bhatti, W.; Brahm Scott, Rafael; Csubry, Z.; Espinoza, N.; Hartman, J. D.; Jordán Colzani, Andrés Cristóbal; Rabus, Markus; Henning, T.; Mancini, L.; Penev, K.; Sarkis, P.; Suc, V.; de Val-Borro, M.; Zhou, G.; Butler, R. P.; Crane, J.; Durkan, S.; Shectman, S.; Kim, J.; Lazar, J.; Papp, I.; Sari, P.; Ricker, G.; Vanderspek, R.; Latham, D. W.; Seager, S.; Winn, J. N.; Jenkins, J.; Chacon, A. D.; Furesz, G.; Goeke, B.; Li, J.; Quinn, S.; Quintana, E. V.; Tenenbaum, P.; Teske, J.; Vezie, M.; Yu, L.; Stockdale, C.; Evans, P.; Relles, H. M.
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    THE PAN-PACIFIC PLANET SEARCH. VI. GIANT PLANETS ORBITING HD 86950 AND HD 222076
    (IOP PUBLISHING LTD, 2017) Wittenmyer, Robert A.; Jones, M. I.; Zhao, Jinglin; Marshall, J. P.; Butler, R. P.; Tinney, C. G.; Wang, Liang; Johnson, John Asher
    We report the detection of two new planets orbiting the K giants HD 86950 and HD 222076, based on precise radial velocities obtained with three instruments: AAT/UCLES, FEROS, and CHIRON. HD 86950b has a period of 1270 +/- 57 days at a=2.72 +/- 0.08 AU, and m sin i=3.6 +/- 0.7 M-Jup. HD 222076b has P=871 +/- 19 days at a=1.83 +/- 0.03 AU, and m sin i=1.56 +/- 0.11 M-Jup. These two giant planets are typical of the population of planets known to orbit evolved stars. In addition, we find a high-amplitude periodic velocity signal (K similar to 50 m/s(-1)) in HD 29399, and show that it is due to stellar variability rather than Keplerian reflex motion. We also investigate the relation between planet occurrence and host-star metallicity for the 164-star Pan-Pacific Planet Search sample of evolved stars. In spite of the small sample of PPPS detections, we confirm the trend of increasing planet occurrence as a function of metallicity found by other studies of planets orbiting evolved stars.
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    TOpI-2447 b / NGTS-29 b: a 69-day Saturn around a Solar analogue
    (2024) Gill, Samuel; Bayliss, Daniel; Ulmer-Moll, Solene; Wheatley, Peter J.; Brahm, Rafael; Anderson, David R.; Armstrong, David; Apergis, Ioannis; Alves, Douglas R.; Burleigh, Matthew R.; Butler, R. P.; Bouchy, Francois; Battley, Matthew P.; Bryant, Edward M.; Bieryla, Allyson; Crane, Jeffrey D.; Collins, Karen A.; Casewell, Sarah L.; Carleo, Ilaria; Claringbold, Alastair B.; Dalba, Paul A.; Dragomir, Diana; Eigmueller, Philipp; Eberhardt, Jan; Fausnaugh, Michael; Gunther, Maximilian N.; Grieves, Nolan; Goad, Michael R.; Gillen, Edward; Hagelberg, Janis; Hobson, Melissa; Hedges, Christina; Henderson, Beth A.; Hawthorn, Faith; Henning, Thomas; Jones, Matias, I; Jordan, Andres; Jenkins, James S.; Kunimoto, Michelle; Krenn, Andreas F.; Kendall, Alicia; Lendl, Monika; McCormac, James; Moyano, Maximiliano; Torres-Miranda, Pascal; Nielsen, Louise D.; Osborn, Ares; Otegi, Jon; Osborn, Hugh; Quinn, Samuel N.; Rodriguez, Joseph E.; Ramsay, Gavin; Schlecker, Martin; Shectman, Stephen A.; Seager, Sara; Tilbrook, Rosanna H.; Trifonov, Trifon; Teske, Johanna K.; Udry, Stephane; Vines, Jose, I; West, Richard R.; Wohler, Bill; Winn, Joshua N.; Wang, Sharon X.; Zhou, George; Zivave, Tafadzwa
    Discovering transiting exoplanets with relatively long orbital periods (>10 d) is crucial to facilitate the study of cool exoplanet atmospheres (T-eq < 700 K) and to understand exoplanet formation and inward migration further out than typical transiting exoplanets. In order to discover these longer period transiting exoplanets, long-term photometric, and radial velocity campaigns are required. We report the discovery of TOI-2447 b (=NGTS-29 b), a Saturn-mass transiting exoplanet orbiting a bright (T = 10.0) Solar-type star (T-eff = 5730 K). TOI-2447 b was identified as a transiting exoplanet candidate from a single transit event of 1.3 per cent depth and 7.29 h duration in TESS Sector 31 and a prior transit event from 2017 in NGTS data. Four further transit events were observed with NGTS photometry which revealed an orbital period of P = 69.34 d. The transit events establish a radius for TOI-2447 b of 0.865 +/- 0.010 R-J, while radial velocity measurements give a mass of 0.386 +/- 0.025 M-J. The equilibrium temperature of the planet is 414 K, making it much cooler than the majority of TESS planet discoveries. We also detect a transit signal in NGTS data not caused by TOI-2447 b, along with transit timing variations and evidence for a similar to 150 d signal in radial velocity measurements. It is likely that the system hosts additional planets, but further photometry and radial velocity campaigns will be needed to determine their parameters with confidence. TOI-2447 b/NGTS-29 b joins a small but growing population of cool giants that will provide crucial insights into giant planet composition and formation mechanisms.