Now showing items 1-20 of 23

    • A 1.9 Earth Radius Rocky Planet and the Discovery of a Non-Transiting Planet in the Kepler-20 System 

      Buchhave, Lars A.; Dressing, Courtney D.; Dumusque, Xavier; Rice, Ken; Vanderburg, Andrew Michael; Mortier, Annelies; Lopez-Morales, Mercedes; Lopez, Eric; Lundkvist, Mia S.; Kjeldsen, Hans; Affer, Laura; Bonomo, Aldo S.; Charbonneau, David; Cameron, Andrew Collier; Cosentino, Rosario; Figueira, Pedro; Fiorenzano, Aldo F. M.; Harutyunyan, Avet; Haywood, Raphaelle D.; Johnson, John Asher; Latham, David Winslow; Lovis, Christophe; Malavolta, Luca; Mayor, Michel; Micela, Giusi; Molinari, Emilio; Motalebi, Fatemeh; Nascimbeni, Valerio; Pepe, Francesco; Phillips, David F.; Piotto, Giampaolo; Pollacco, Don; Queloz, Didier; Sasselov, Dimitar D.; Ségransan, Damien; Sozzetti, Alessandro; Udry, Stéphane; Watson, Chris (American Astronomical Society, 2016)
      Kepler-20 is a solar-type star (V = 12.5) hosting a compact system of five transiting planets, all packed within the orbital distance of Mercury in our own solar system. A transition from rocky to gaseous planets with a ...
    • Absolute Properties of the Low-Mass Eclipsing Binary CM Draconis 

      Morales, Juan Carlos; Ribas, Ignasi; Jordi, Carme; Torres, Guillermo; Gallardo, Jose; Guinan, Edward F.; Charbonneau, David; Wolf, Marek; Latham, David W.; Anglada-Escude, Guillem; Bradstreet, David H.; Everett, Mark E.; O'Donovan, Francis T.; Mandushev, Georgi; Mathieu, Robert D. (Institute of Physics, 2009)
      Spectroscopic and eclipsing binary systems offer the best means for determining accurate physical properties of stars, including their masses and radii. The data available for low-mass stars have yielded firm evidence that ...
    • An astro-comb calibrated solar telescope to search for the radial velocity signature of Venus 

      Phillips, David F.; Glenday, Alex; Dumusque, Xavier; Buchschacher, Nicolas; Cameron, Andrew Collier; Cecconi, Massimo; Charbonneau, David; Cosentino, Rosario; Ghedina, Adriano; Haywood, Raphaelle D.; Latham, David Winslow; Li, Chih-Hao; Lodi, Marcello; Lovis, Christophe; Molinari, Emilio; Pepe, Francesco; Sasselov, Dimitar D.; Szentgyorgyi, Andrew H.; Udry, Stephane; Walsworth, Ronald Lee (2016)
      We recently demonstrated sub-m/s sensitivity in measuring the radial velocity (RV) between the Earth and Sun using a simple solar telescope feeding the HARPS-N spectrograph at the Italian National Telescope, which is ...
    • Characterizing K2 Planet Discoveries: A Super-Earth Transiting the Bright K Dwarf Hip 116454 

      Vanderburg, Andrew Michael; Montet, Benjamin T.; Johnson, John Asher; Buchhave, Lars A.; Zeng, Li; Pepe, Francesco; Cameron, Andrew Collier; Latham, David Winslow; Molinari, Emilio; Udry, Stéphane; Lovis, Christophe; Matthews, Jaymie M.; Cameron, Chris; Law, Nicholas; Bowler, Brendan P.; Angus, Ruth; Baranec, Christoph; Bieryla, Allyson; Boschin, Walter; Charbonneau, David; Cosentino, Rosario; Dumusque, Xavier; Figueira, Pedro; Guenther, David B.; Harutyunyan, Avet; Hellier, Coel; Kuschnig, Rainer; Lopez-Morales, Mercedes; Mayor, Michel; Micela, Giusi; Moffat, Anthony F. J.; Pedani, Marco; Phillips, David F.; Piotto, Giampaolo; Pollacco, Don; Queloz, Didier; Rice, Ken; Riddle, Reed; Rowe, Jason F.; Rucinski, Slavek M.; Sasselov, Dimitar D.; Ségransan, Damien; Sozzetti, Alessandro; Szentgyorgyi, Andrew H.; Watson, Chris; Weiss, Werner W. (IOP Publishing, 2015)
      We report the first planet discovery from the two-wheeled Kepler (K2) mission: HIP 116454 b. The host star HIP 116454 is a bright (V = 10.1, K = 8.0) K1 dwarf with high proper motion and a parallax-based distance of 55.2 ...
    • A Disintegrating Minor Planet Transiting a White Dwarf 

      Vanderburg, Andrew Michael; Johnson, John Asher; Rappaport, Saul; Bieryla, Allyson; Irwin, Jonathan; Lewis, John Arban; Kipping, David; Brown, Warren R.; Dufour, Patrick; Ciardi, David R.; Angus, Ruth; Schaefer, Laura Kay; Latham, David Winslow; Charbonneau, David; Beichman, Charles; Eastman, Jason D.; McCrady, Nate; Wittenmyer, Robert A.; Wright, Jason T. (Springer Nature, 2015)
      White dwarfs are the end state of most stars, including the Sun, after they exhaust their nuclear fuel. Between 1/4 and 1/2 of white dwarfs have elements heavier than helium in their atmospheres1,2, even though these ...
    • An Earth-sized planet with an Earth-like density 

      Pepe, Francesco; Cameron, Andrew Collier; Latham, David Winslow; Molinari, Emilio; Udry, Stéphane; Bonomo, Aldo S.; Buchhave, Lars A.; Charbonneau, David; Cosentino, Rosario; Dressing, Courtney; Dumusque, Xavier; Figueira, Pedro; Fiorenzano, Aldo F. M.; Gettel, Sara; Harutyunyan, Avet; Haywood, Raphaelle D.; Horne, Keith; Lopez-Morales, Mercedes; Lovis, Christophe; Malavolta, Luca; Mayor, Michel; Micela, Giusi; Motalebi, Fatemeh; Nascimbeni, Valerio; Phillips, David F.; Piotto, Giampaolo; Pollacco, Don; Queloz, Didier; Rice, Ken; Sasselov, Dimitar D.; Ségransan, Damien; Sozzetti, Alessandro; Szentgyorgyi, Andrew H.; Watson, Christopher A. (Springer Nature, 2013)
      Recent analyses1–4 of data from the NASA Kepler spacecraft5 have established that planets with radii within 25 per cent of Earth’s (R⊕) are commonplace throughout the Galaxy, orbiting at least 16.5 per cent of Sun-like ...
    • HARPS-N Observes the Sun as a Star 

      Dumusque, Xavier; Glenday, Alex; Phillips, David F.; Buchschacher, Nicolas; Cameron, Andrew Collier; Cecconi, Massimo; Charbonneau, David; Cosentino, Rosario; Ghedina, Adriano; Latham, David Winslow; Li, Chih-Hao; Lodi, Marcello; Lovis, Christophe; Molinari, Emilio; Pepe, Francesco; Udry, Stéphane; Sasselov, Dimitar D.; Szentgyorgyi, Andrew H.; Walsworth, Ronald Lee (IOP Publishing, 2015)
      Radial velocity (RV) perturbations induced by stellar surface inhomogeneities including spots, plages and granules currently limit the detection of Earth-twins using Doppler spectroscopy. Such stellar noise is poorly ...
    • The HARPS-N Rocky Planet Search 

      Motalebi, F.; Udry, S.; Gillon, M.; Lovis, C.; Ségransan, D.; Buchhave, L. A.; Demory, B. O.; Malavolta, L.; Dressing, Courtney Danielle; Sasselov, Dimitar D.; Rice, K.; Charbonneau, David; Collier Cameron, A.; Latham, David Winslow; Molinari, E.; Pepe, F.; Affer, L.; Bonomo, A. S.; Cosentino, R.; Dumusque, X.; Figueira, P.; Fiorenzano, A. F. M.; Gettel, S.; Harutyunyan, A.; Haywood, Raphaelle D.; Johnson, John Asher; Lopez, E.; Lopez-Morales, Maria Mercedes; Mayor, M.; Micela, G.; Mortier, A.; Nascimbeni, V.; Philips, D.; Piotto, G.; Pollacco, D.; Queloz, D.; Sozzetti, A.; Vanderburg, A.; Watson, C. A. (EDP Sciences, 2015)
      We know now from radial velocity surveys and transit space missions that planets only a few times more massive than our Earth are frequent around solar-type stars. Fundamental questions about their formation history, ...
    • The Kepler-10 planetary system revisited by HARPS-N: A hot rocky world and a solid Neptune-mass planet. 

      Dumusque, Xavier; Bonomo, Aldo S.; Haywood, Raphaelle D.; Malavolta, Luca; Ségransan, Damien; Buchhave, Lars A.; Cameron, Andrew Collier; Latham, David Winslow; Molinari, Emilio; Pepe, Francesco; Udry, Stéphane; Charbonneau, David; Cosentino, Rosario; Dressing, Courtney; Figueira, Pedro; Fiorenzano, Aldo F. M.; Gettel, Sara; Harutyunyan, Avet; Horne, Keith; Lopez-Morales, Mercedes; Lovis, Christophe; Mayor, Michel; Micela, Giusi; Motalebi, Fatemeh; Nascimbeni, Valerio; Phillips, David F.; Piotto, Giampaolo; Pollacco, Don; Queloz, Didier; Rice, Ken; Sasselov, Dimitar D.; Sozzetti, Alessandro; Szentgyorgyi, Andrew H.; Watson, Chris (IOP Publishing, 2014)
      Kepler-10b was the first rocky planet detected by the Kepler satellite and confirmed with radial velocity follow-up observations from Keck-HIRES. The mass of the planet was measured with a precision of around 30%, which ...
    • Kepler-20: A Sun-like Star with Three Sub-Neptune Exoplanets and Two Earth-size Candidates 

      Gautier, Thomas N.; Charbonneau, David; Rowe, Jason F.; Marcy, Geoffrey W.; Isaacson, Howard; Torres, Guillermo; Fressin, Francois; Rogers, Leslie A.; Désert, Jean-Michel; Buchhave, Lars A.; Latham, David Winslow; Quinn, Samuel N.; Ciardi, David R.; Fabrycky, Daniel C.; Ford, Eric B.; Gilliland, Ronald L.; Walkowicz, Lucianne M.; Bryson, Stephen T.; Cochran, William D.; Endl, Michael; Fischer, Debra A.; Howell, Steve B.; Horch, Elliott P.; Barclay, Thomas; Batalha, Natalie; Borucki, William J.; Christiansen, Jessie L.; Geary, John Charles; Henze, Christopher E.; Holman, Matthew Jon; Ibrahim, Khadeejah; Jenkins, Jon M.; Kinemuchi, Karen; Koch, David G.; Lissauer, Jack J.; Sanderfer, Dwight T.; Sasselov, Dimitar D.; Seager, Sara; Silverio, Kathryn; Smith, Jeffrey C.; Still, Martin; Stumpe, Martin C.; Tenenbaum, Peter; Van Cleve, Jeffrey (IOP Publishing, 2012)
      We present the discovery of the Kepler-20 planetary system, which we initially identified through the detection of five distinct periodic transit signals in the Kepler light curve of the host star 2MASS J19104752+4220194. ...
    • The Kepler-454 System: A Small, Not-rocky Inner Planet, a Jovian World, and a Distant Companion 

      Gettel, Sara; Charbonneau, David; Dressing, Courtney D.; Buchhave, Lars A.; Dumusque, Xavier; Vanderburg, Andrew Michael; Bonomo, Aldo S.; Malavolta, Luca; Pepe, Francesco; Cameron, Andrew Collier; Latham, David Winslow; Udry, Stéphane; Marcy, Geoffrey W.; Isaacson, Howard; Howard, Andrew W.; Davies, Guy R.; Aguirre, Victor Silva; Kjeldsen, Hans; Bedding, Timothy R.; Lopez, Eric; Affer, Laura; Cosentino, Rosario; Figueira, Pedro; Fiorenzano, Aldo F. M.; Harutyunyan, Avet; Johnson, John Asher; Lopez-Morales, Mercedes; Lovis, Christophe; Mayor, Michel; Micela, Giusi; Molinari, Emilio; Motalebi, Fatemeh; Phillips, David F.; Piotto, Giampaolo; Queloz, Didier; Rice, Ken; Sasselov, Dimitar D.; Ségransan, Damien; Sozzetti, Alessandro; Watson, Chris; Basu, Sarbani; Campante, Tiago L.; Christensen-Dalsgaard, Jørgen; Kawaler, Steven D.; Metcalfe, Travis S.; Handberg, Rasmus; Lund, Mikkel N.; Lundkvist, Mia S.; Huber, Daniel; Chaplin, William J. (American Astronomical Society, 2016)
      Kepler-454 (KOI-273) is a relatively bright (V = 11.69 mag), Sun-like star that hosts a transiting planet candidate in a 10.6 day orbit. From spectroscopy, we estimate the stellar temperature to be 5687 ± 50 K, its metallicity ...
    • Low False-Positive Rate of Kepler Candidates Estimated From a Combination of Spitzer and Follow-Up Observations 

      Désert, Jean-Michel; Charbonneau, David; Torres, Guillermo; Fressin, François; Ballard, Sarah; Bryson, Stephen T.; Knutson, Heather A.; Batalha, Natalie M.; Borucki, William J.; Brown, Timothy M.; Deming, Drake; Ford, Eric B.; Fortney, Jonathan J.; Gilliland, Ronald L.; Latham, David Winslow; Seager, Sara (IOP Publishing, 2015)
      NASA’s Kepler mission has provided several thousand transiting planet candidates during the four years of its nominal mission, yet only a small subset of these candidates have been confirmed as true planets. Therefore, the ...
    • Mass and Radius Determinations for Five Transiting M-Dwarf Stars 

      Fernandez, Jose M.; Latham, David W.; Everett, Mark E.; Mandushev, Georgi; Charbonneau, David; O'Donovan, Francis T.; Alonso, Roi; Hergenrother, Carl W.; Stefanik, Robert P.; Torres, Guilermo; Esquerdo, Gilbert A. (Institute of Physics, 2009)
      We have derived masses and radii for both components in five short-period single-lined eclipsing binary stars discovered by the TrES wide-angle photometric survey for transiting planets. All these systems consist of a ...
    • The Mass of Kepler-93b and the Composition of Terrestrial Planets 

      Dressing, Courtney Danielle; Charbonneau, David; Dumusque, Xavier; Gettel, Sara; Pepe, Francesco; Collier Cameron, Andrew; Latham, David Winslow; Molinari, Emilio; Udry, Stéphane; Affer, Laura; Bonomo, Aldo S.; Buchhave, Lars A.; Cosentino, Rosario; Figueira, Pedro; Fiorenzano, Aldo F. M.; Harutyunyan, Avet; Haywood, Raphaelle D.; Johnson, John Asher; Lopez-Morales, Mercedes; Lovis, Christophe; Malavolta, Luca; Mayor, Michel; Micela, Giusi; Motalebi, Fatemeh; Nascimbeni, Valerio; Phillips, David F.; Piotto, Giampaolo; Pollacco, Don; Queloz, Didier; Rice, Ken; Sasselov, Dimitar D.; Ségransan, Damien; Sozzetti, Alessandro; Szentgyorgyi, Andrew H.; Watson, Chris (IOP Publishing, 2015)
      Kepler-93b is a 1.478 ± 0.019 R⊕ planet with a 4.7 day period around a bright (V = 10.2), astroseismically characterized host star with a mass of 0.911 ± 0.033 M and a radius of 0.919 ± 0.011 R. Based on 86 radial velocity ...
    • A New Spectroscopic and Photometric Analysis of the Transiting Planet Systems TrES-3 and TrES-4 

      Sozzetti, Alessandro; Torres, Guillermo; Charbonneau, David; Winn, Joshua N.; Korzennik, Sylvain G.; Holman, Matthew J.; Latham, David W.; Laird, John B.; Fernandez, Jose; O'Donovan, Francis T.; Mandushev, Georgi; Dunham, Edward; Everett, Mark E.; Esquerdo, Gilbert A.; Rabus, Markus; Belmonte, Juan A.; Deeg, Hans J.; Brown, Timothy N.; Hidas, Marton G.; Baliber, Nairn (Institute of Physics, 2009)
      We report new spectroscopic and photometric observations of the parent stars of the recently discovered transiting planets TrES-3 and TrES-4. A detailed abundance analysis based on high-resolution spectra yields [Fe/H] = ...
    • 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 Winslow; Lopez-Morales, Mercedes; Lovis, Christophe; Mayor, Michel; Micela, Giusi; Molinari, Emilio; Pepe, Francesco; Piotto, Giampaolo; Phillips, David F.; Queloz, Didier; Rice, Ken; Sasselov, Dimitar D.; Ségransan, Damien; Sozzetti, Alessandro; Udry, Stéphane; Watson, Chris (American Astronomical Society, 2016)
      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 ...
    • A sub-Mercury-sized exoplanet 

      Barclay, Thomas; Rowe, Jason F.; Lissauer, Jack J.; Huber, Daniel; Fressin, François; Howell, Steve B.; Bryson, Stephen T.; Chaplin, William J.; Désert, Jean-Michel; Lopez, Eric D.; Marcy, Geoffrey W.; Mullally, Fergal; Ragozzine, Darin; Torres, Guillermo; Adams, Elisabeth R.; Agol, Eric; Barrado, David; Basu, Sarbani; Bedding, Timothy R.; Buchhave, Lars A.; Charbonneau, David; Christiansen, Jessie L.; Christensen-Dalsgaard, Jørgen; Ciardi, David; Cochran, William D.; Dupree, Andrea K.; Elsworth, Yvonne; Everett, Mark; Fischer, Debra A.; Ford, Eric B.; Fortney, Jonathan J.; Geary, John Charles; Haas, Michael R.; Handberg, Rasmus; Hekker, Saskia; Henze, Christopher E.; Horch, Elliott; Howard, Andrew W.; Hunter, Roger C.; Isaacson, Howard; Jenkins, Jon M.; Karoff, Christoffer; Kawaler, Steven D.; Kjeldsen, Hans; Klaus, Todd C.; Latham, David Winslow; Li, Jie; Lillo-Box, Jorge; Lund, Mikkel N.; Lundkvist, Mia; Metcalfe, Travis S.; Miglio, Andrea; Morris, Robert L.; Quintana, Elisa V.; Stello, Dennis; Smith, Jeffrey C.; Still, Martin; Thompson, Susan E. (Springer Nature, 2013)
      Since the discovery of the first exoplanets1, 2, it has been known that other planetary systems can look quite unlike our own3. Until fairly recently, we have been able to probe only the upper range of the planet size ...
    • A Super-Earth Transiting a Nearby Low-Mass Star 

      Charbonneau, David; Berta, Zachory Kaczmarczyk; Irwin, Jonathan M; Burke, Christopher J.; Nutzman, Philip Andrew; Buchhave, Lars A.; Lovis, Christophe; Bonfils, Xavier; Latham, David W.; Udry, Stéphane; Murray-Clay, Ruth Ann; Holman, Matthew J.; Falco, Emilio E.; Winn, Joshua N.; Queloz, Didier; Pepe, Francesco; Mayor, Michel; Delfosse, Xavier; Forveille, Thierry (Nature Publishing Group, 2009)
      A decade ago, the detection of the first transiting extrasolar planet provided a direct constraint on its composition and opened the door to spectroscopic investigations of extrasolar planetary atmospheres. Because such ...
    • Transit Timing Observations From Kepler: Ii. Confirmation of Two Multiplanet Systems via a Non-Parametric Correlation Analysis 

      Ford, Eric B.; Fabrycky, Daniel C.; Steffen, Jason H.; Carter, Joshua A.; Fressin, Francois; Holman, Matthew Jon; Lissauer, Jack J.; Moorhead, Althea V.; Morehead, Robert C.; Ragozzine, Darin; Rowe, Jason F.; Welsh, William F.; Allen, Christopher; Batalha, Natalie M.; Borucki, William J.; Bryson, Stephen T.; Buchhave, Lars A.; Burke, Christopher J.; Caldwell, Douglas A.; Charbonneau, David; Clarke, Bruce D.; Cochran, William D.; Désert, Jean-Michel; Endl, Michael; Everett, Mark E.; Fischer, Debra A.; Gautier, Thomas N.; Gilliland, Ron L.; Jenkins, Jon M.; Haas, Michael R.; Horch, Elliott; Howell, Steve B.; Ibrahim, Khadeejah A.; Isaacson, Howard; Koch, David G.; Latham, David Winslow; Li, Jie; Lucas, Philip; MacQueen, Phillip J.; Marcy, Geoffrey W.; McCauliff, Sean; Mullally, Fergal R.; Quinn, Samuel N.; Quintana, Elisa; Shporer, Avi; Still, Martin; Tenenbaum, Peter; Thompson, Susan E.; Torres, Guillermo; Twicken, Joseph D.; Wohler, Bill; Wohler, Bill (IOP Publishing, 2012)
      We present a new method for confirming transiting planets based on the combination of transit timing variations (TTVs) and dynamical stability. Correlated TTVs provide evidence that the pair of bodies is in the same physical ...
    • Transit timing observations from Kepler: III. Confirmation of four multiple planet systems by a Fourier-domain study of anticorrelated transit timing variations 

      Steffen, Jason H.; Fabrycky, Daniel C.; Ford, Eric B.; Carter, Joshua A.; Désert, Jean-Michel; Fressin, Francois; Holman, Matthew Jon; Lissauer, Jack J.; Moorhead, Althea V.; Rowe, Jason F.; Ragozzine, Darin; Welsh, William F.; Batalha, Natalie M.; Borucki, William J.; Buchhave, Lars A.; Bryson, Steve; Caldwell, Douglas A.; Charbonneau, David; Ciardi, David R.; Cochran, William D.; Endl, Michael; Everett, Mark E.; Gautier, Thomas N.; Gilliland, Ron L.; Girouard, Forrest R.; Jenkins, Jon M.; Horch, Elliott; Howell, Steve B.; Isaacson, Howard; Klaus, Todd C.; Koch, David G.; Latham, David Winslow; Li, Jie; Lucas, Philip; MacQueen, Phillip J.; Marcy, Geoffrey W.; McCauliff, Sean; Middour, Christopher K.; Morris, Robert L.; Mullally, Fergal R.; Quinn, Samuel N.; Quintana, Elisa V.; Shporer, Avi; Still, Martin; Tenenbaum, Peter; Thompson, Susan E.; Twicken, Joseph D.; Van Cleve, Jeffery (Oxford University Press (OUP), 2012)
      We present a method to confirm the planetary nature of objects in systems with multiple transiting exoplanet candidates. This method involves a Fourier-Domain analysis of the deviations in the transit times from a constant ...