Browsing by Author "28564871-e675-4aef-a04e-36ac5e293502"

Now showing items 21-40 of 43

    • K2-237 b and K2-238 b: Discovery and characterization of two new transiting hot Jupiters from K2 
      Soto, M.; Díaz, M.; Jenkins, James Stewart; Rojas, F.; Espinoza, N.; Brahm, R.; Drass, H.; Jones, M.; Rabus, M.; Hartman, J.; Sarkis, P.; Jordán, A.; Lachaume, R.; Pantoja, B.; Vučković, M.; Ciardi, D.; Crossfield, I.; Dressing, C.; Gonzales, E.; Hirsch, L. (Oxford University Press, 2018)
      We report the discovery of two hot Jupiters orbiting the stars K2-237 and K2-238. We used photometric data from Campaigns 11 and 12 of the Kepler K2 mission and radial velocity data obtained using the HARPS, FEROS, and ...
    • MagAO imaging of long-period objects (MILO). II. A puzzling white dwarfaround the sun-like star HD 11112 
      Rodigas, Timothy J.; Bergeron, P.; Simon, Amélie; Arriagada, Pamela; Faherty, Jacqueline K.; Anglada Escudé, Guillem; Mamajek, Eric E.; Weinberger, Alycia; Butler, R. Paul; Males, Jared R.; Morzinski, Katie; Close, Laird M.; Hinz, Philip M.; Bailey, Jeremy; Carter, Brad; Jenkins, James Stewart; Jones, Hugh; O’Toole, Simon; Tinney, C. G.; Wittenmyer, Rob; Debes, John (IOP Publishing, 2016)
      HD 11112 is an old, Sun-like star that has a long-term radial velocity (RV) trend indicative of a massive companion on a wide orbit. Here we present direct images of the source responsible for the trend using the Magellan ...
    • Mass determinations of the three mini-Neptunes transiting TOI-125 
      Nielsen, L. D.; Gandolfi, D.; Armstrong, D. J.; Jenkins, James Stewart; Fridlund, M.; Santos, N. C.; Dai, F.; Adibekyan, V.; Luque, R.; Steffen, J. H.; Esposito, M.; Meru, F.; Sabotta, S.; Bolmont, E.; Kossakowski, D.; Otegi, J. F.; Murgas, F.; Stalport, M.; Rodler, F.; Díaz, M. R.; Kurtovic, N. T.; Ricker, G.; Vanderspek, R.; Latham, D. W.; Seager, S.; Winn, J. N.; Jenkins, J. M.; Allart, R.; Almenara, J. M.; Barrado, D.; Barros, S. C. C.; Bayliss, D.; Berdiñas, Z. M.; Boisse, I.; Bouchy, F.; Boyd, P.; Brown, D. J. A.; Bryant, E. M.; Burke, C.; Cochran, W. D.; Cooke, B. F.; Demangeon, O. D. S.; Díaz, R. F.; Dittman, J.; Dorn, C.; Dumusque, X.; García, R. A.; González Cuesta, L.; Grziwa, S.; Georgieva, I.; Guerrero, N.; Hatzes, A. P.; Helled, R.; Henze, C. E.; Hojjatpanah, S.; Korth, J.; Lam, K. W. F.; Lillo Box, J.; López, T. A.; Livingston, J.; Mathur, S.; Mousis, O.; Narita, N.; Osborn, H. P.; Palle, E.; Peña Rojas, P. A.; Persson, C. M.; Quinn, S. N.; Rauer, H.; Redfield, S.; Santerne, A.; Santos, L. A. dos; Seidel, J. V.; Sousa, S. G.; Ting, E. B.; Turbet, M.; Udry, S.; Vanderburg, A.; Van Eylen, V.; Vines, J. I.; Wheatley, P. J.; Wilson, P. A. (Oxford University Press, 2020)
      The Transiting Exoplanet Survey Satellite, TESS, is currently carrying out an all-sky search for small planets transiting bright stars. In the first year of the TESS survey, a steady progress was made in achieving the ...
    • Masses, oxygen, and carbon abundances in CHEPS dwarf stars 
      Pavlenko, Y. V.; Kaminsky, B. M.; Jenkins, James Stewart; Ivanyuk, O. M.; Jones, H.R.A.; Lyubchik, Y. P. (EDP Sciences, 2019)
      Context. We report the results from the determination of stellar masses, carbon, and oxygen abundances in the atmospheres of 107 stars from the Calan-Hertfordshire Extrasolar Planet Search (CHEPS) programme. Our stars are ...
    • New spectroscopic binary companions of giant stars and updated metallicity distribution for binary systems 
      Bluhm, P.; Jones, M. I.; Vanzi, L.; Soto, M. G; Vos, J.; Wittenmyer, R. A.; Drass, H.; Jenkins, James Stewart; Olivares, F.; Mennickent, R. E.; Vuckovic, M.; Rojo, P.; Melo, C. H. F. (EDP Sciences, 2016)
      We report the discovery of 24 spectroscopic binary companions to giant stars. We fully constrain the orbital solution for 6 of these systems. We cannot unambiguously derive the orbital elements for the remaining stars ...
    • NGTS clusters survey - II. White-light ares from the youngest stars in Orion 
      Jackman, James A. G.; Wheatley, Peter J.; Acton, Jack S.; Anderson, David R.; Belardi, Claudia; Burleigh, Matthew R.; Casewell, Sarah L.; Eigmüller, Philipp; Gill, Samuel; Gillen, Edward; Goad, Michael R.; Grange, Andrew; Hodgkin, Simon T.; Jenkins, James; McCormac, James; Moyano, Maximiliano; Queloz, Didier; Raynard, Liam; Tilbrook, Rosanna H.; Watson, Christopher A.; West, Richard G. (Oxford University Press, 2020)
      We present the detection of high-energy white-light flares from pre-main-sequence stars associated with the Orion Complex, observed as part of the Next Generation Transit Survey (NGTS). With energies up to 5.2 x 10(35) erg ...
    • NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit 
      Bryant, Edward M.; Bayliss, Daniel; Nielsen, Louise D.; Veras, Dimitri; Acton, Jack S.; Anderson, David R.; Armstrong, David J.; Bouchy, Fracois; Briegal, Joshua T.; Burleigh, Matthew R.; Cabrera, Juan; Casewell, Sarah L.; Chaushev, Alexander; Cooke, Benjamin F; Csizmadia, Szilard; Eigmueller, Philipp; Erikson, Anders; Gill, Samuel; Gillen, Edward; Goad, Michael R.; Grieves, Nolan; Gunther, Maximilian N.; Henderson, Beth; Hogan, Aleisha; Jenkins, James S.; Lendl, Monika; McCormac, J.; Moyano, Maximiliano; Queloz, Didier; Rauer, Heike; Raynard, Liam; Smith, Alexis M. S.; Tilbrook, Rossanna H.; Udry, Stéphane; Vines, Jose I.; Watson, Christopher A.; West, Richard G.; Wheatley, Peter J. (Oxford University Press, 2020)
      We report the discovery of the transiting exoplanet NGTS-12b by the Next Generation Transit Survey (NGTS). The host star, NGTS-12, is a V = 12.38 mag star with an effective temperature of T-eff = 5690 +/- 130 K. NGTS-12b ...
    • NGTS-1b: a hot Jupiter transiting an M-dwarf 
      Bayliss, Daniel; Gillen, Edward; Eigmueller, Philipp; Jenkins, James Stewart; Soto, Maritza (Oxford University Press, 2018)
      We present the discovery of NGTS-1b, a hot Jupiter transiting an early M-dwarf host (T-eff,(*) = 3916 (+71)(-63) K) in a P = 2.647 d orbit discovered as part of the Next Generation Transit Survey (NGTS). The planet has a ...
    • Phase Curves of Hot Neptune LTT 9779b Suggest a High-metallicity Atmosphere 
      Crossfield, Ian J. M.; Dragomir, Diana; Cowan, Nicolas B.; Daylan, Tansu; Wong, Ian; Kataria, Tiffany; Deming, Drake; Kreidberg, Laura; Mikal-Evans, Thomas; Gorjian, Varoujan; Jenkins, James Stewart; Benneke, Bjorn; Collins, Karen A.; Burke, Christopher J.; Henze, Christopher E.; McDermott, Scott; Mireles, Ismael; Watanabe, David; Wohler, Bill; Ricker, George; Vanderspek, Roland; Seager, Sara; Jenkins, Jon M. (IOP Publishing, 2020)
      Phase-curve measurements provide a global view of the composition, thermal structure, and dynamics of exoplanet atmospheres. Although most of the dozens of phase-curve measurements made to date are of large, massive hot ...
    • SAFARI - I. A SPHERE discovery of a super metal-rich M-dwarf companion to the star HD 86006 
      Pantoja, B.; Jenkins, James Stewart; Girard, J.; Vigan, A.; Salter, G.; Jones, M. (Oxford University Press, 2018)
      We report the direct detection of a fully convective, early-to-midM-dwarf companion orbiting the star HD 86006, using ESO-SPHERE during Science Verification as part of the SAFARI program. HARPS+CORALIE radial velocity ...
    • Shallow transit follow-up from next-generation transit survey: simultaneous observations of HD 106315 with ... 
      Smith, Alexis; Eigmüller, Philipp; Gurumoorthy, Ramanathan; Csizmadia, Szilárd; Bayliss, Daniel; Burleigh, Matthew R.; Cabrera, Juan; Casewell, Sarah; Erikson, Anders; Goad, Michael; Grange, Andrew; Jenkins, James Stewart; Pollacco, Don; Rauer, Heike; Raynard, Liam; Udry, Stéphane; West, Richard; Wheatley, Peter (Wiley, 2020)
      The Next Generation Transit Survey (NGTS) is a photometric survey for transiting exoplanets, consisting of 12 identical 0.2-m telescopes. We report a measurement of the transit of HD 106315 c using a novel observing mode ...
    • Simultaneous TESS and NGTS transit observations of WASP-166 b 
      Bryant, Edward M.; Bayliss, Daniel; McCormac, James; Wheatley, Peter J.; Acton, Jack S.; Anderson, David R,; Armstrong, David J.; Bouchy, François; Belardi, Claudia; Burleigh, Matthew R.; Tilbrook, Rosie H.; Casewell, Sarah L.; Cooke, Benjamin F; Gill, Samuel; Goad, Michael R.; Jenkins, James Stewart; Lendl, Monika; Pollacco, Don; Queloz, Didier; Raynard, Liam; Smith, Alexis M. S.; Vines, José; West, Richard G.; Udry, Stephane (Oxford University Press, 2020)
      We observed a transit of WASP-166 b using nine Next Generation Transit Survey (NGTS) telescopes simultaneously with the Transiting Exoplanet Survey Satellite (TESS) observations of the same transit. We achieved a photometric ...
    • Spectroscopic parameters and atmospheric chemistries of stars (SPECIES) I. Code description and dwarf stars ... 
      Soto, M.; Jenkins, James Stewart (Edp Sciences, 2018-07-17)
      Context. The detection and subsequent characterisation of exoplanets are intimately linked to the characteristics of their host star. Therefore, it is necessary to study the star in detail in order to understand the formation ...
    • Spitzer Reveals Evidence of Molecular Absorption in the Atmosphere of the Hot Neptune LTT 9779b 
      Dragomir, Diana; Crossfield, Ian J. M.; Benneke, Bjoern; Wong, Ian; Daylan, Tansu; Díaz, Matias; Deming, Drake; Molliere, Paul; Kreidberg, Laura; Jenkins, James Stewart; Berardo, David; Christiansen, Jessie L.; Dressing, Courtney D.; Gorjian, Varoujan; Kane, Stephen R.; Mikal Evans, Thomas; Morales, Farisa Y.; Werner, Michael; Ricker, George R.; Vanderspek, Roland; Seager, S.; Winn, Joshua N.; Jenkins, Jon M.; Colon, Knicole D.; Fong, Willie; Cuevas Guerrero, Natalia Alejandra; Hesse, Katharine; Osborn, Hugh P.; Rose, Mark E.; Smith, Jeffrey C.; Ting, Eric B. (IOP, 2020)
      Non-rocky sub-Jovian exoplanets in high-irradiation environments are rare. LTT 9779b, also known as Transiting Exoplanet Survey Satellite (TESS) object of interest (TOI) 193.01, is one of the few such planets discovered ...
    • Surprisingly different starspot distributions on the near equal-mass equal-rotation-rate stars in the M ... 
      Barnes, J. R.; Jeffers, S. V.; Haswell, C. A; Jones, H.R.A.; Shulyak, D.; Pavlenko, Ya. V.; Jenkins, James Stewart (Oxford University, 2017)
      We aim to understand how stellar parameters such as mass and rotation impact the distribution of star-spots on the stellar surface. To this purpose, we have used Doppler imaging to reconstruct the surface brightness ...
    • TESS Reveals a short-period sub-neptune sibling (HD 86226c) to a known long-period giant planet 
      Teske, Johanna; Díaz, Matías R.; Luque, Rafael; Močnik, Teo; Seidel, Julia V.; Fernández Otegi, Jon; Feng, Fabo; Jenkins, James S.; Pallè, Enric; Ségransan, Demien; Udry, Stéphane; Collins, Karen A.; Eastman, Jason D.; Ricker, George R.; Vanderspek, Roland; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Anderson, David R.; Barclay, Thomas; Bouchy, François; Burt, Jennifer A.; Paul Butler, R.; Caldwell, Douglas A.; Collins, Kevin I.; Crane, Jeffrey D.; Dorn, Caroline; Flowers, Erin; Haldemann, Jonás; Helled, Ravit; Hellier, Coel; Jensen, Eric L. N.; Kane, Stephen R.; Law, Nicholas; Lissauer, Jack J.; Mann, Andrew W.; Marmier, Maxime; Nielsen, Louise Dyregaard; Rose, Mark E.; Shectman, Stephen A.; Shporer, Avi; Torres, Guillermo; Wang, Sharon; Wolfgang, Angie; Wong, Ian; Ziegler, Carl (IOP Publishing Ltd, 2020)
      The Transiting Exoplanet Survey Satellite mission was designed to find transiting planets around bright, nearby stars. Here, we present the detection and mass measurement of a small, short-period (≈4 days) transiting ...
    • The effect of ISM absorption on stellar activity measurements and its relevance for exoplanet studies 
      Fossati, L.; Marcelja, S. E.; Staab, D.; Cubillos, P. E.; France, K.; Haswell, C. A.; Ingrassia, S.; Jenkins, James Stewart; Koskinen, T.; Lanza, A. F.; Redfield, S.; Youngblood, A.; Pelzmann, G. (EDP Sciences, 2017-05)
      Past ultraviolet and optical observations of stars hosting close-in Jupiter-mass planets have shown that some of these stars present an anomalously low chromospheric activity, significantly below the basal level. For the ...
    • The Magellan/PFS Exoplanet Search: a 55-d period dense Neptune transiting the bright (V = 8.6) star HD 95338 
      Díaz, Matías R.; Jenkins, James; Feng, Fabo; Butler, R. Paul; Tuomi, Mikko; Shectman, Stephen A.; Thorngren, Daniel; Soto, Maritza G.; Vines, José I.; Teske, Johanna K.; Dragomir, Diana; Villanueva, Steven; Kane, Stephen R.; Berdiñas, Zaira M.; Crane, Jeffrey D.; Wang, Sharon; Arriagada, Pamela (Oxford University Press, 2020)
      We report the detection of a transiting, dense Neptune planet candidate orbiting the bright (V = 8.6) K0.5V star HD 95338. Detection of the 55-d periodic signal comes from the analysis of precision radial velocities from ...
    • The metal-rich abundance pattern - spectroscopic properties and abundances for 107 main-sequence stars 
      Ivanyuk, O. M.; Jenkins, James Stewart; Pavlenko, Ya. V.; Jones, H. R. A.; Pinfield, D. J. (Oxford university press, 2017)
      We report results from the high-resolution spectral analysis of the 107 metal-rich (mostly [Fe/H] >= 7.67 dex) target stars from the Calan Hertfordshire Extrasolar Planet Search programme observed with HARPS. Using our ...
    • The next generation transit survey (NGTS) 
      Wheatley, Peter J.; West, Richard G.; Goad, Michael R.; Jenkins, James Stewart; Erikson, Anders; Soto, Maritza (Oxford University Press, 2018)
      We describe the Next Generation Transit Survey (NGTS), which is a ground-based project searching for transiting exoplanets orbiting bright stars. NGTS builds on the legacy of previous surveys, most notably WASP, and is ...