16 results on '"Samuel Gill"'
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2. The discovery of three hot Jupiters, NGTS-23b, 24b, and 25b, and updated parameters for HATS-54b from the Next Generation Transit Survey
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David G Jackson, Christopher A Watson, Ernst J W de Mooij, Jack S Acton, Douglas R Alves, David R Anderson, David J Armstrong, Daniel Bayliss, Claudia Belardi, François Bouchy, Edward M Bryant, Matthew R Burleigh, Sarah L Casewell, Jean C Costes, Phillip Eigmüller, Michael R Goad, Samuel Gill, Edward Gillen, Maximilian N Günther, Faith Hawthorn, Beth A Henderson, James A G Jackman, James S Jenkins, Monika Lendl, Alicia Kendall, James McCormac, Maximiliano Moyano, Louise D Nielsen, Ares Osborn, Ramotholo R Sefako, Alexis M S Smith, Rosanna H Tilbrook, Oliver Turner, Stéphane Udry, Jose I Vines, Richard G West, Peter J Wheatley, and Hannah Worters
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- 2022
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3. Periodic stellar variability from almost a million NGTS light curves
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Joshua T Briegal, Edward Gillen, Didier Queloz, Simon Hodgkin, Jack S Acton, David R Anderson, David J Armstrong, Matthew P Battley, Daniel Bayliss, Matthew R Burleigh, Edward M Bryant, Sarah L Casewell, Jean C Costes, Philipp Eigmüller, Samuel Gill, Michael R Goad, Maximilian N Günther, Beth A Henderson, James A G Jackman, James S Jenkins, Lars T Kreutzer, Maximiliano Moyano, Monika Lendl, Gareth D Smith, Rosanna H Tilbrook, Christopher A Watson, Richard G West, and Peter J Wheatley
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- 2022
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4. A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS
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Thomas G Wilson, Elisa Goffo, Yann Alibert, Davide Gandolfi, Andrea Bonfanti, Carina M Persson, Andrew Collier Cameron, Malcolm Fridlund, Luca Fossati, Judith Korth, Willy Benz, Adrien Deline, Hans-Gustav Florén, Pascal Guterman, Vardan Adibekyan, Matthew J Hooton, Sergio Hoyer, Adrien Leleu, Alexander James Mustill, Sébastien Salmon, Sérgio G Sousa, Olga Suarez, Lyu Abe, Abdelkrim Agabi, Roi Alonso, Guillem Anglada, Joel Asquier, Tamas Bárczy, David Barrado Navascues, Susana C C Barros, Wolfgang Baumjohann, Mathias Beck, Thomas Beck, Nicolas Billot, Xavier Bonfils, Alexis Brandeker, Christopher Broeg, Edward M Bryant, Matthew R Burleigh, Marco Buttu, Juan Cabrera, Sébastien Charnoz, David R Ciardi, Ryan Cloutier, William D Cochran, Karen A Collins, Knicole D Colón, Nicolas Crouzet, Szilard Csizmadia, Melvyn B Davies, Magali Deleuil, Laetitia Delrez, Olivier Demangeon, Brice-Olivier Demory, Diana Dragomir, Georgina Dransfield, David Ehrenreich, Anders Erikson, Andrea Fortier, Tianjun Gan, Samuel Gill, Michaël Gillon, Crystal L Gnilka, Nolan Grieves, Sascha Grziwa, Manuel Güdel, Tristan Guillot, Jonas Haldemann, Kevin Heng, Keith Horne, Steve B Howell, Kate G Isaak, Jon M Jenkins, Eric L N Jensen, Laszlo Kiss, Gaia Lacedelli, Kristine Lam, Jacques Laskar, David W Latham, Alain Lecavelier des Etangs, Monika Lendl, Kathryn V Lester, Alan M Levine, John Livingston, Christophe Lovis, Rafael Luque, Demetrio Magrin, Wenceslas Marie-Sainte, Pierre F L Maxted, Andrew W Mayo, Brian McLean, Marko Mecina, Djamel Mékarnia, Valerio Nascimbeni, Louise D Nielsen, Göran Olofsson, Hugh P Osborn, Hannah L M Osborne, Roland Ottensamer, Isabella Pagano, Enric Pallé, Gisbert Peter, Giampaolo Piotto, Don Pollacco, Didier Queloz, Roberto Ragazzoni, Nicola Rando, Heike Rauer, Seth Redfield, Ignasi Ribas, George R Ricker, Martin Rieder, Nuno C Santos, Gaetano Scandariato, François-Xavier Schmider, Richard P Schwarz, Nicholas J Scott, Sara Seager, Damien Ségransan, Luisa Maria Serrano, Attila E Simon, Alexis M S Smith, Manfred Steller, Chris Stockdale, Gyula Szabó, Nicolas Thomas, Eric B Ting, Amaury H M J Triaud, Stéphane Udry, Vincent Van Eylen, Valérie Van Grootel, Roland K Vanderspek, Valentina Viotto, Nicholas Walton, and Joshua N Winn
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- 2022
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5. TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet
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Ares Osborn, David J Armstrong, Bryson Cale, Rafael Brahm, Robert A Wittenmyer, Fei Dai, Ian J M Crossfield, Edward M Bryant, Vardan Adibekyan, Ryan Cloutier, Karen A Collins, E Delgado Mena, Malcolm Fridlund, Coel Hellier, Steve B Howell, George W King, Jorge Lillo-Box, Jon Otegi, S Sousa, Keivan G Stassun, Elisabeth C Matthews, Carl Ziegler, George Ricker, Roland Vanderspek, David W Latham, S Seager, Joshua N Winn, Jon M Jenkins, Jack S Acton, Brett C Addison, David R Anderson, Sarah Ballard, David Barrado, Susana C C Barros, Natalie Batalha, Daniel Bayliss, Thomas Barclay, Björn Benneke, John Berberian, Francois Bouchy, Brendan P Bowler, César Briceño, Christopher J Burke, Matthew R Burleigh, Sarah L Casewell, David Ciardi, Kevin I Collins, Benjamin F Cooke, Olivier D S Demangeon, Rodrigo F Díaz, C Dorn, Diana Dragomir, Courtney Dressing, Xavier Dumusque, Néstor Espinoza, P Figueira, Benjamin Fulton, E Furlan, E Gaidos, C Geneser, Samuel Gill, Michael R Goad, Erica J Gonzales, Varoujan Gorjian, Maximilian N Günther, Ravit Helled, Beth A Henderson, Thomas Henning, Aleisha Hogan, Saeed Hojjatpanah, Jonathan Horner, Andrew W Howard, Sergio Hoyer, Dan Huber, Howard Isaacson, James S Jenkins, Eric L N Jensen, Andrés Jordán, Stephen R Kane, Richard C Kidwell, John Kielkopf, Nicholas Law, Monika Lendl, M Lund, Rachel A Matson, Andrew W Mann, James McCormac, Matthew W Mengel, Farisa Y Morales, Louise D Nielsen, Jack Okumura, Hugh P Osborn, Erik A Petigura, Peter Plavchan, Don Pollacco, Elisa V Quintana, Liam Raynard, Paul Robertson, Mark E Rose, Arpita Roy, Michael Reefe, Alexandre Santerne, Nuno C Santos, Paula Sarkis, J Schlieder, Richard P Schwarz, Nicholas J Scott, Avi Shporer, A M S Smith, C Stibbard, Chris Stockdale, Paul A Strøm, Joseph D Twicken, Thiam-Guan Tan, A Tanner, J Teske, Rosanna H Tilbrook, C G Tinney, Stephane Udry, Jesus Noel Villaseñor, Jose I Vines, Sharon X Wang, Lauren M Weiss, Richard G West, Peter J Wheatley, Duncan J Wright, Hui Zhang, and F Zohrabi
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- 2021
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6. Three New Brown Dwarfs and A Massive Hot Jupiter Revealed By TESS Around Early-Type Stars
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Angelica Psaridi, François Bouchy, Monika Lendl, Nolan Grieves, Keivan G. Stassun, Theron Carmichael, Samuel Gill, Pablo A. Peña Rojas, Tianjun Gan, Avi Shporer, Allyson Bieryla, Rafael Brahm, Jessie L. Christiansen, Ian J. M. Crossfield, Franck Galland, Matthew J. Hooton, Jon M. Jenkins, James S. Jenkins, David W. Latham, Michael B. Lund, Joseph E. Rodriguez, Eric B. Ting, Stéphane Udry, Solène Ulmer-Moll, Robert A. Wittenmyer, Yanzhe Zhang, George Zhou, Brett Addison, Marion Cointepas, Karen A. Collins, Kevin I. Collins, Adrien Deline, Courtney D. Dressing, Phil Evans, Steven Giacalone, Alexis Heitzmann, Ismael Mireles, and Joshua E. Schlieder
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Astronomy ,Astrophysics - Abstract
Context. The detection and characterization of exoplanets and brown dwarfs around massive AF-type stars is essential to investigate and constrain the impact of stellar mass on planet properties. However, such targets are still poorly explored in radial velocity (RV) surveys because they only feature a small number of stellar lines and those are usually broadened and blended by stellar rotation as well as stellar jitter. As a result, the available information about the formation and evolution of planets and brown dwarfs around hot stars is limited. Aims. We aim to increase the sample and precisely measure the masses and eccentricities of giant planets and brown dwarfs transiting early-type stars detected by the Transiting Exoplanet Survey Satellite (TESS). Methods. We followed bright (V < 12 mag) stars with Teff > 6200 K that host giant companions (R > 7 R⊕) using ground-based photometric observations as well as high precision radial velocity measurements from the CORALIE, CHIRON, TRES, FEROS, and MINERVA-Australis spectrographs. Results. In the context of the search for exoplanets and brown dwarfs around early-type stars, we present the discovery of three brown dwarf companions, TOI-629b, TOI-1982b, and TOI-2543b, and one massive planet, TOI-1107b. From the joint analysis of TESS and ground-based photometry in combination with high precision radial velocity measurements, we find the brown dwarfs have masses between 66 and 68 MJup, periods between 7.54 and 17.17 days, and radii between 0.95 and 1.11 RJup. The hot Jupiter TOI-1107b has an orbital period of 4.08 days, a radius of 1.30 RJup, and a mass of 3.35 MJup. As a by-product of this program, we identified four low-mass eclipsing components (TOI-288b, TOI-446b, TOI-478b, and TOI-764b). Conclusions. Both TOI-1107b and TOI-1982b present an anomalously inflated radius with respect to the age of these systems. TOI-629 is among the hottest stars with a known transiting brown dwarf. TOI-629b and TOI-1982b are among the most eccentric brown dwarfs. The massive planet and the three brown dwarfs add to the growing population of well-characterized giant planets and brown dwarfs transiting AF-type stars and they reduce the apparent paucity.
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- 2022
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7. NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit
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Jack S Acton, Michael R Goad, Matthew R Burleigh, Sarah L Casewell, Hannes Breytenbach, Louise D Nielsen, Gareth Smith, David R Anderson, Matthew P Battley, Daniel Bayliss, François Bouchy, Edward M Bryant, Szilárd Csizmadia, Philipp Eigmüller, Samuel Gill, Edward Gillen, Nolan Grieves, Maximilian N Günther, Beth A Henderson, Simon T Hodgkin, James A G Jackman, James S Jenkins, Monika Lendl, James McCormac, Maximiliano Moyano, Richard P Nelson, Ramotholo R Sefako, Alexis M S Smith, Manu Stalport, Jessymol K Thomas, Rosanna H Tilbrook, Stéphane Udry, Richard G West, Peter J Wheatley, Hannah L Worters, Jose I Vines, and Douglas R Alves
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- 2021
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8. Stellar flares detected with the Next Generation Transit Survey
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James A G Jackman, Peter J Wheatley, Jack S Acton, David R Anderson, Daniel Bayliss, Joshua T Briegal, Matthew R Burleigh, Sarah L Casewell, Boris T Gänsicke, Samuel Gill, Edward Gillen, Michael R Goad, Maximilian N Günther, Beth A Henderson, Simon T Hodgkin, James S Jenkins, Chloe Pugh, Didier Queloz, Liam Raynard, Rosanna H Tilbrook, Christopher A Watson, and Richard G West
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- 2021
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9. The EBLM project – VII. Spin–orbit alignment for the circumbinary planet host EBLM J0608-59 A/TOI-1338 A
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Vedad Kunovac Hodžić, Amaury H M J Triaud, David V Martin, Daniel C Fabrycky, Heather M Cegla, Andrew Collier Cameron, Samuel Gill, Coel Hellier, Veselin B Kostov, Pierre F L Maxted, Jerome A Orosz, Francesco Pepe, Don Pollacco, Didier Queloz, Damien Ségransan, Stéphane Udry, and William F Welsh
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- 2020
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10. NGTS clusters survey – II. White-light flares from the youngest stars in Orion
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James A G Jackman, Peter J Wheatley, Jack S Acton, David R Anderson, Claudia Belardi, Matthew R Burleigh, Sarah L Casewell, Philipp Eigmüller, Samuel Gill, Edward Gillen, Michael R Goad, Andrew Grange, Simon T Hodgkin, James S Jenkins, James McCormac, Maximiliano Moyano, Didier Queloz, Liam Raynard, Rosanna H Tilbrook, Christopher A Watson, and Richard G West
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- 2020
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11. NGTS J214358.5−380102 – NGTS discovery of the most eccentric known eclipsing M-dwarf binary system
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Jack S Acton, Michael R Goad, Liam Raynard, Sarah L Casewell, James A G Jackman, Richard D Alexander, David R Anderson, Daniel Bayliss, Edward M Bryant, Matthew R Burleigh, Claudia Belardi, Benjamin F Cooke, Philipp Eigmüller, Samuel Gill, James S Jenkins, Monika Lendl, Tom Louden, James McCormac, Maximiliano Moyano, Louise D Nielsen, Rosanna H Tilbrook, Stéphane Udry, Christopher A Watson, Richard G West, Peter J Wheatley, and Jose I Vines
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- 2020
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12. NGTS-7Ab: an ultrashort-period brown dwarf transiting a tidally locked and active M dwarf
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James A G Jackman, Peter J Wheatley, Dan Bayliss, Samuel Gill, Simon T Hodgkin, Matthew R Burleigh, Ian P Braker, Maximilian N Günther, Tom Louden, Oliver Turner, David R Anderson, Claudia Belardi, François Bouchy, Joshua T Briegal, Edward M Bryant, Juan Cabrera, Sarah L Casewell, Alexander Chaushev, Jean C Costes, Szilard Csizmadia, Philipp Eigmüller, Anders Erikson, Boris T Gänsicke, Edward Gillen, Michael R Goad, James S Jenkins, James McCormac, Maximiliano Moyano, Louise D Nielsen, Don Pollacco, Katja Poppenhaeger, Didier Queloz, Heike Rauer, Liam Raynard, Alexis M S Smith, Stéphane Udry, Jose I Vines, Christopher A Watson, and Richard G West
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- 2019
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13. NGTS-6b: an ultrashort period hot-Jupiter orbiting an old K dwarf
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Jose I Vines, James S Jenkins, Jack S Acton, Joshua Briegal, Daniel Bayliss, François Bouchy, Claudia Belardi, Edward M Bryant, Matthew R Burleigh, Juan Cabrera, Sarah L Casewell, Alexander Chaushev, Benjamin F Cooke, Szilárd Csizmadia, Philipp Eigmüller, Anders Erikson, Emma Foxell, Samuel Gill, Edward Gillen, Michael R Goad, James A G Jackman, George W King, Tom Louden, James McCormac, Maximiliano Moyano, Louise D Nielsen, Don Pollacco, Didier Queloz, Heike Rauer, Liam Raynard, Alexis M S Smith, Maritza G Soto, Rosanna H Tilbrook, Ruth Titz-Weider, Oliver Turner, Stéphane Udry, Simon R Walker, Christopher A Watson, Richard G West, and Peter J Wheatley
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- 2019
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14. A remnant planetary core in the hot-Neptune desert
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David J. Armstrong, Théo A. Lopez, Vardan Adibekyan, Richard A. Booth, Edward M. Bryant, Karen A. Collins, Magali Deleuil, Alexandre Emsenhuber, Chelsea X. Huang, George W. King, Jorge Lillo-Box, Jack J. Lissauer, Elisabeth Matthews, Olivier Mousis, Louise D. Nielsen, Hugh Osborn, Jon Otegi, Nuno C. Santos, Sérgio G. Sousa, Keivan G. Stassun, Dimitri Veras, Carl Ziegler, Jack S. Acton, Jose M. Almenara, David R. Anderson, David Barrado, Susana C. C. Barros, Daniel Bayliss, Claudia Belardi, Francois Bouchy, César Briceño, Matteo Brogi, David J. A. Brown, Matthew R. Burleigh, Sarah L. Casewell, Alexander Chaushev, Kevin I. Collins, Knicole D. Colón, Benjamin F. Cooke, Ian J. M. Crossfield, Rodrigo F. Díaz, Elisa Delgado Mena, Olivier D. S. Demangeon, Caroline Dorn, Xavier Dumusque, Philipp Eigmüller, Michael Fausnaugh, Pedro Figueira, Tianjun Gan, Siddharth Gandhi, Samuel Gill, Erica J. Gonzales, Michael R. Goad, Ravit Helled, Saeed Hojjatpanah, Steve B. Howell, James Jackman, James S. Jenkins, Jon M. Jenkins, Eric L. N. Jensen, Grant M. Kennedy, David W. Latham, Nicholas Law, Monika Lendl, Michael Lozovsky, Andrew W. Mann, Maximiliano Moyano, James McCormac, Farzana Meru, Christoph Mordasini, Ares Osborn, Don Pollacco, Didier Queloz, Liam Raynard, George R. Ricker, Pamela Rowden, Alexandre Santerne, Joshua E. Schlieder, Sara Seager, Lizhou Sha, Thiam-Guan Tan, Rosanna H. Tilbrook, Eric Ting, Stéphane Udry, Roland Vanderspek, Christopher A. Watson, Richard G. West, Paul A. Wilson, Joshua N. Winn, Peter Wheatley, Jesus Noel Villasenor, Jose I. Vines, and Zhuchang Zhan
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Exobiology ,Lunar And Planetary Science And Exploration - Abstract
The interiors of giant planets remain poorly understood. Even for the planets in the Solar System, difficulties in observation lead to large uncertainties in the properties of planetary cores. Exoplanets that have undergone rare evolutionary processes provide a route to understanding planetary interiors. Planets found in and near the typically barren hot-Neptune ‘desert’ (a region in mass–radius space that contains few planets) have proved to be particularly valuable in this regard. These planets include HD149026b, which is thought to have an unusually massive core, and recent discoveries such as LTT9779b and NGTS-4b, on which photoevaporation has removed a substantial part of their outer atmospheres. Here we report observations of the planet TOI-849b, which has a radius smaller than Neptune’s but an anomalously large mass of 39.1(+2.7−2.6) Earth masses and a density of 5.2(+0.7−0.8) grams per cubic centimetre, similar to Earth’s. Interior-structure models suggest that any gaseous envelope of pure hydrogen and helium consists of no more than 3.9(+0.8−0.9) per cent of the total planetary mass. The planet could have been a gas giant before undergoing extreme mass loss via thermal self-disruption or giant planet collisions, or it could have avoided substantial gas accretion, perhaps through gap opening or late formation. Although photoevaporation rates cannot account for the mass loss required to reduce a Jupiter-like gas giant, they can remove a small (a few Earth masses) hydrogen and helium envelope on timescales of several billion years, implying that any remaining atmosphere on TOI-849b is likely to be enriched by water or other volatiles from the planetary interior. We conclude that TOI-849b is the remnant core of a giant planet.
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- 2020
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15. TOI-1338: TESS’ First Transiting Circumbinary Planet
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Veselin B. Kostov, Jerome A. Orosz, Adina D. Feinstein, William F. Welsh, Wolf Cukier, Nader Haghighipour, Billy Quarles, David V. Martin, Benjamin T. Montet, Guillermo Torres, Amaury H. M. J. Triaud, Thomas Barclay, Patricia Boyd, Cesar Briceno, Andrew Collier Cameron, Alexandre C. M. Correia, Emily A Gilbert, Samuel Gill, Michaël Gillon, Jacob Haqq-Misra, Coel Hellier, Courtney Dressing, Daniel C. Fabrycky, Gabor Furesz, Jon M Jenkins, Stephen R. Kane, Ravi Kopparapu, Vedad Kunovac Hodzic, David W. Latham, Nicholas Law, Alan M. Levine, Gongjie Li, Chris Lintott, Jack J. Lissauer, Andrew W. Mann, Tsevi Mazeh, Rosemary Mardling, Pierre F. L. Maxted, Nora Eisner, Francesco Pepe, Joshua Pepper, Don Pollacco, Samuel N. Quinn, Elisa V Quintana, Jason F. Rowe, George Ricker, Mark E Rose, S. Seager, Alexandre Santerne, Damien Ségransan, Donald R. Short, Jeffrey C. Smith, Matthew R. Standing, Andrei Tokovinin, Trifon Trifonov, Oliver Turner, Joseph D. Twicken, Stéphane Udry, Roland Vanderspek, Joshua N. Winn, Eric T. Wolf, Carl Ziegler, Peter Ansorge, Frank Barnet, Joel Bergeron, Marc Huten, Giuseppe Pappa, and Timo van der Straeten
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Astronomy - Abstract
We report the detection of the first circumbinary planet (CBP) found by Transiting Exoplanet Survey Satellite (TESS). The target, a known eclipsing binary, was observed in sectors 1 through 12 at 30 minute cadence and in sectors 4 through 12 at 2 minute cadence. It consists of two stars with masses of 1.1M(ʘ) and 0.3M(ʘ) on a slightly eccentric (0.16), 14.6 day orbit, producing prominent primary eclipses and shallow secondary eclipses. The planet has a radius of ∼6.9R(⊕) and was observed to make three transits across the primary star of roughly equal depths (∼0.2%) but different durations—a common signature of transiting CBPs. Its orbit is nearly circular (e≈0.09) with an orbital period of 95.2 days. The orbital planes of the binary and the planet are aligned to within ∼1°. To obtain a complete solution for the system, we combined the TESS photometry with existing ground-based radialvelocity observations in a numerical photometric-dynamical model. The system demonstrates the discovery potential of TESS for CBPs and provides further understanding of the formation and evolution of planets orbiting close binary stars.
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- 2020
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16. NGTS-11 b (TOI-1847 b): A Transiting Warm Saturn Recovered from a TESS Single-transit Event
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Samuel Gill, Peter J. Wheatley, Benjamin F. Cooke, Andrés Jordán, Louise D. Nielsen, Daniel Bayliss, David R. Anderson, Jose I. Vines, Monika Lendl, Jack S. Acton, David J. Armstrong, François Bouchy, Rafael Brahm, Edward M. Bryant, Matthew R. Burleigh, Sarah L. Casewell, Philipp Eigmüller, Néstor Espinoza, Edward Gillen, Michael R. Goad, Nolan Grieves, Maximilian N. Günther, Thomas Henning, Melissa J. Hobson, Aleisha Hogan, James S. Jenkins, James McCormac, Maximiliano Moyano, Hugh P. Osborn, Don Pollacco, Didier Queloz, Heike Rauer, Liam Raynard, Felipe Rojas, Paula Sarkis, Alexis M. S. Smith, Marcelo Tala Pinto, Rosanna H. Tilbrook, Stéphane Udry, Christopher A. Watson, and Richard G. West
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- 2020
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