Now showing items 1-20 of 23

    • The accretion dynamics of EX Lupi in quiescence : the star, the spot, and the accretion column 

      Sicilia-Aguilar, Aurora; Fang, Min; Roccatagliata, Veronica; Collier Cameron, Andrew; Kóspál, Ágnes; Henning, Thomas; Ábrahám, Peter; Sipos, Nikoletta (2015-08-06) - Journal article
      Context. EX Lupi is a young, accreting M0 star and the prototype of EXor variable stars. Its spectrum is very rich in emission lines, including many metallic lines with narrow and broad components. The presence of a close ...
    • The BEBOP radial-velocity survey for circumbinary planets I. Eight years of CORALIE observations of 47 single-line eclipsing binaries and abundance constraints on the masses of circumbinary planets 

      Martin, David V.; Triaud, Amaury H. M. J.; Udry, Stéphane; Marmier, Maxime; Maxted, Pierre F. L.; Collier Cameron, Andrew; Hellier, Coel; Pepe, Francesco; Pollacco, Don; Ségransan, Damien; West, Richard (2019-04-11) - Journal article
      We introduce the BEBOP radial velocity survey for circumbinary planets. We initiated this survey using the CORALIE spectrograph on the Swiss Euler Telescope at La Silla, Chile. An intensive four year observing campaign ...
    • A discrete set of possible transit ephemerides for two long-period gas giants orbiting HIP 41378 

      Becker, Juliette C.; Vanderburg, Andrew; Rodriguez, Joseph E.; Omohundro, Mark; Adams, Fred C.; Stassun, Keivan G.; Yao, Xinyu; Hartman, Joel; Pepper, Joshua; Bakos, Gaspar; Barentsen, Geert; Beatty, Thomas G.; Bhatti, Waqas; Chontos, Ashley; Collier Cameron, Andrew; Hellier, Coel; Huber, Daniel; James, David; Kuhn, Rudolf B.; Lund, Michael B.; Pollacco, Don; Siverd, Robert J.; Stevens, Daniel J.; Cardoso, José Vinícius de Miranda; West, Richard (2019-01) - Journal article
      In 2015, K2 observations of the bright (V = 8.9, K = 7.7) star HIP 41378 revealed a rich system of at least five transiting exoplanets, ranging in size from super-Earths to gas giants. The 2015 K2 observations only spanned ...
    • The EBLM Project : IV. Spectroscopic orbits of over 100 eclipsing M dwarfs masquerading as transiting hot-Jupiters 

      Triaud, Amaury H. M. J.; Martin, David V.; Ségransan, Damien; Smalley, Barry; Maxted, Pierre F. L.; Anderson, David R.; Bouchy, François; Collier Cameron, Andrew; Faedi, Francesca; Gómez Maqueo Chew, Yilen; Hebb, Leslie; Hellier, Coel; Marmier, Maxime; Pepe, Francesco; Pollacco, Don; Queloz, Didier; Udry, Stéphane; West, Richard (2017-12) - Journal article
      We present 2271 radial velocity measurements taken on 118 single-line binary stars, taken over eight years with the CORALIE spectrograph. The binaries consist of F/G/K primaries and M dwarf secondaries. They were initially ...
    • Erratum : "Qatar-2: A K dwarf orbited by a transiting hot Jupiter and a more massive companion in an outer orbit" (2012, ApJ, 750, 84) 

      Bryan, Marta L.; Alsubai, Khalid A.; Latham, David W.; Parley, Neil R.; Collier Cameron, Andrew; Quinn, Samuel N.; Carter, Joshua A.; Fulton, Benjamin J.; Berlind, Perry; Brown, Warren R.; Buchhave, Lars A.; Calkins, Michael L.; Esquerdo, Gilbert A.; Fűrész, Gábor; Gråe Jørgensen, Uffe; Horne, Keith D.; Stefanik, Robert P.; Street, Rachel A.; Torres, Guillermo; West, Richard G.; Dominik, Martin; Harpsøe, Kennet B. W.; Liebig, Christine; Calchi Novati, Sebastiano; Ricci, Davide; Skottfelt, Jesper F. (2014-02-04) - Journal article
    • Hierarchical Bayesian calibration of tidal orbit decay rates among hot Jupiters 

      Collier Cameron, Andrew; Jardine, Moira (2018-05-11) - Journal article
      Transiting hot Jupiters occupy a wedge-shaped region in the mass ratio-orbital separation diagram. Its upper boundary is eroded by tidal spiral-in of massive, close-in planets and is sensitive to the stellar tidal dissipation ...
    • HII 2407: an eclipsing binary revealed by K2 observations of the Pleiades 

      David, Trevor J.; Stauffer, John; Hillenbrand, Lynne A.; Cody, Ann Marie; Conroy, Kyle; Stassun, Keivan G.; Pope, Benjamin; Aigrain, Suzanne; Gillen, Ed; Collier Cameron, Andrew; Barrado, David; Rebull, L. M.; Isaacson, Howard; Marcy, Geoffrey W.; Zhang, Celia; Riddle, Reed L.; Ziegler, Carl; Law, Nicholas M.; Baranec, Christoph (2015-11-01) - Journal article
      The star HII 2407 is a member of the relatively young Pleiades star cluster and was previously discovered to be a single-lined spectroscopic binary. It is newly identified here within Kepler/K2 photometric time series data ...
    • The homogeneous study of transiting systems (HoSTS). I. The pilot study of WASP-13 

      Gómez Maqueo Chew, Yilen; Faedi, Francesca; Cargile, Phillip; Doyle, Amanda P.; Ghezzi, Luan; Sousa, Sérgio; Barros, Susana C. C.; Hebb, Leslie; Cunha, Katia; Schuler, Simon C.; Smith, Verne V.; Collier Cameron, Andrew; Pollacco, Don; Santos, Nuno C.; Smalley, Barry; Stassun, Keivan G. (2013-05-01) - Journal article
      We present the fundamental stellar and planetary properties of the transiting planetary system WASP-13 within the framework of the Homogeneous Study of Transiting Systems (HoSTS). HoSTS aims to derive the fundamental stellar ...
    • K2-114b and K2-115b : two transiting warm Jupiters 

      Shporer, Avi; Zhou, George; Fulton, Benjamin J.; Vanderburg, Andrew; Espinoza, Nestor; Collins, Karen; Ciardi, David; Bayliss, Daniel; Armstrong, James D.; Bento, Joao; Bouchy, Francois; Cochran, William D.; Collier Cameron, Andrew; Colón, Knicole; Crossfield, Ian; Dragomir, Diana; Howard, Andrew W.; Howell, Steve B.; Isaacson, Howard; Kielkopf, John F.; Murgas, Felipe; Sefako, Ramotholo; Sinukoff, Evan; Siverd, Robert; Udry, Stephane (2017-10-20) - Journal article
      We report the first results from a search for transiting warm Jupiter exoplanets—gas giant planets receiving stellar irradiation below about 108 erg−1 cm−2, equivalent to orbital periods beyond about 10 days around Sun-like ...
    • A Kepler study of starspot lifetimes with respect to light-curve amplitude and spectral type 

      Giles, Helen A. C.; Collier Cameron, Andrew; Haywood, Raphaëlle D. (2017-12-01) - Journal article
      Wide-field high-precision photometric surveys such as Kepler have produced reams of data suitable for investigating stellar magnetic activity of cooler stars. Starspot activity produces quasi-sinusoidal light curves whose ...
    • The Kepler-19 system : a thick-envelope super-Earth with two Neptune-mass companions characterized using radial velocities and transit timing variations 

      Malavolta, Luca; Borsato, Luca; Granata, Valentina; Piotto, Giampaolo; Lopez, Eric; Vanderburg, Andrew; Figueira, Pedro; Mortier, Annelies; Nascimbeni, Valerio; Affer, Laura; Bonomo, Aldo S.; Bouchy, Francois; Buchhave, Lars A.; Charbonneau, David; Collier Cameron, Andrew; Cosentino, Rosario; Dressing, Courtney D.; Dumusque, Xavier; Fiorenzano, Aldo F. M.; Harutyunyan, Avet; Haywood, Raphaëlle D.; Johnson, John Asher; Latham, David W.; Lopez-Morales, Mercedes; Lovis, Christophe; Mayor, Michel; Micela, Giusi; Molinari, Emilio; Motalebi, Fatemeh; Pepe, Francesco; Phillips, David F.; Pollacco, Don; Queloz, Didier; Rice, Ken; Sasselov, Dimitar; Ségransan, Damien; Sozzetti, Alessandro; Udry, Stéphane; Watson, Chris (2017-04-24) - Journal article
      We report a detailed characterization of the Kepler-19 system. This star was previously known to host a transiting planet with a period of 9.29 days, a radius of 2.2 R⊕ and an upper limit on the mass of 20 M⊕. The presence ...
    • Kepler-21b : a rocky planet around a V = 8.25 mag star 

      Lopez-Morales, Mercedes; Haywood, Raphaelle D.; Coughlin, Jeffrey L.; Zeng, Li; Buchhave, Lars A.; Giles, Helen A. C.; Affer, Laura; Bonomo, Aldo S.; Charbonneau, David; Collier Cameron, Andrew; Cosentino, Rosario; Dressing, Courtney D.; Dumusque, Xavier; Figueira, Pedro; Fiorenzano, Aldo F. M.; Harutyunyan, Avet; Johnson, John Asher; Latham, David W.; Lopez, Eric D.; Lovis, Christophe; Malavolta, Luca; Mayor, Michel; Micela, Giusi; Molinari, Emilio; Mortier, Annelies; Motalebi, Fatemeh; Nascimbeni, Valerio; Pepe, Francesco; Phillips, David F.; Piotto, Giampaolo; Pollacco, Don; Queloz, Didier; Rice, Ken; Sasselov, Dimitar; Segransan, Damien; Sozzetti, Alessandro; Udry, Stephane; Vanderburg, Andrew; Watson, Chris (2016-12-02) - Journal article
      HD 179070, aka Kepler-21, is a V = 8.25 F6IV star and the brightest exoplanet host discovered by Kepler. An early detailed analysis by Howell et al. (2012) of the first thirteen months (Q0 - Q5) of Kepler light curves ...
    • More rapidly rotating PMS M dwarfs with light curves suggestive of orbiting clouds of material 

      Stauffer, John; Rebull, Luisa; David, Trevor; Jardine, Moira; Collier Cameron, Andrew; Cody, Ann Marie; Hillenbrand, Lynne; Barrado, David; van Eyken, Julian; Melis, Carl; Briceno, Cesar (2018-02) - Journal article
      In a previous paper, using data from K2 Campaign 2, we identified 11very low mass members of the ρ Oph and Upper Scorpius star-forming region as having periodic photometric variability and phased light curves showing ...
    • The orbit and mass of the third planet in the Kepler-56 system 

      Otor, Oderah Justin; Montet, Benjamin T.; Johnson, John Asher; Charbonneau, David; Collier Cameron, Andrew; Howard, Andrew W.; Isaacson, Howard; Latham, David W.; Lopez-Morales, Mercedes; Lovis, Christophe; Mayor, Michel; Micela, Giusi; Molinari, Emilio; Pepe, Francesco; Piotto, Giampaolo; Phillips, David F.; Queloz, Didier; Rice, Ken; Sasselov, Dimitar; Ségransan, Damien; Sozzetti, Alessandro; Udry, Stéphane; Watson, Chris (2016-12-01) - Journal article
      While the vast majority of multiple-planet systems have orbital angular momentum axes that align with the spin axis of their host star, Kepler-56 is an exception: its two transiting planets are coplanar yet misaligned by ...
    • Orbiting clouds of material at the Keplerian co-rotation radius of rapidly rotating low mass WTTs in Upper Sco 

      Stauffer, John; Collier Cameron, Andrew; Jardine, Moira; David, Trevor; Rebull, Luisa; Cody, Ann Marie; Hillenbrand, Lynne; Barrado, David; Wolk, Scott; Davenport, James; Pinsonneault, Marc (2017-03-10) - Journal article
      Using K2 data, we have identified 23 very low mass members of the ρ Oph and Upper Scorpius star-forming region as having periodic photometric variability not easily explained by well-established physical mechanisms such ...
    • Peculiar architectures for the WASP-53 and WASP-81 planet-hosting systems 

      Triaud, Amaury H. M. J.; Neveu-VanMalle, Marion; Lendl, Monika; Anderson, David R.; Collier Cameron, Andrew; Delrez, Laetitia; Doyle, Amanda; Gillon, Michaël; Hellier, Coel; Jehin, Emmanuël; Maxted, Pierre F. L.; Ségransan, Damien; Smalley, Barry; Queloz, Didier; Pollacco, Don; Southworth, John; Tregloan-Reed, Jeremy; Udry, Stéphane; West, Richard (2017-05) - Journal article
      We report the detection of two new systems containing transiting planets. Both were identified by WASP as worthy transiting planet candidates. Radial velocity observations quickly verified that the photometric signals were ...
    • Precise masses in the WASP-47 system 

      Vanderburg, Andrew; Becker, Juliette C.; Buchhave, Lars A.; Mortier, Annelies; Lopez, Eric; Malavolta, Luca; Haywood, Raphaëlle D.; Latham, David W.; Charbonneau, David; López-Morales, Mercedes; Adams, Fred C.; Bonomo, Aldo Stefano; Bouchy, François; Collier Cameron, Andrew; Cosentino, Rosario; Di Fabrizio, Luca; Dumusque, Xavier; Fiorenzano, Aldo; Harutyunyan, Avet; Johnson, John Asher; Lorenzi, Vania; Lovis, Christophe; Mayor, Michel; Micela, Giusi; Molinari, Emilio; Pedani, Marco; Pepe, Francesco; Piotto, Giampaolo; Phillips, David; Rice, Ken; Sasselov, Dimitar; Ségransan, Damien; Sozzetti, Alessandro; Udry, Stéphane; Watson, Chris (2017-11-17) - Journal article
      We present precise radial velocity observations of WASP-47, a star known to host a hot Jupiter, a distant Jovian companion, and, uniquely, two additional transiting planets in short-period orbits: a super-Earth in a ≈19 ...
    • The refined physical properties of transiting exoplanetary system WASP-11/HAT-P-10 

      Wang, Xiao-bin; Gu, Sheng-hong; Collier Cameron, Andrew; Wang, Yi-bo; Hui, Ho-Keung; Kwok, Chi-Tai; Yeung, Bill; Leung, Kam-Cheung (2014-03-18) - Journal article
      The transiting exoplanetary system WASP-11/HAT-P-10 was observed using the CCD camera at Yunnan Observatories, China from 2008 to 2011, and four new transit light curves were obtained. Combined with published radial velocity ...
    • Rotation in the Pleiades with K2. III. Speculations on origins and evolution 

      Stauffer, John; Rebull, Luisa; Bouvier, Jerome; Hillenbrand, Lynne A.; Collier Cameron, Andrew; Pinsonneault, Marc; Aigrain, Suzanne; Barrado, David; Bouy, Herve; Ciardi, David; Cody, Ann Marie; David, Trevor; Micela, Giusi; Soderblom, David; Somers, Garrett; Stassun, Keivan G.; Valenti, Jeff; Vrba, Frederick J. (2016-10-11) - Journal article
      We use high quality K2 light curves for hundreds of stars in the Pleiades to understand better the angular momentum evolution and magnetic dynamos of young, low mass stars. The K2 light curves provide not only rotational ...
    • Spin-orbit angles as a probe to orbital evolution 

      Triaud, Amaury; Collier Cameron, Andrew; Queloz, Didier; Anderson, David; Brown, David John Alexander; Smalley, Barry; Bouchy, Francois; Lendl, Monika; Gillon, Michael (2013-07-01) - Conference poster
      The WASP (Wide Angle Search for Planets) has discovered 75 planets in the Southern Hemisphere. We followed-up 40 of these and observed the Rossiter-McLaughlin effect. It allows us to measure the angle between the stellar ...