Browsing by Author "Howell, Steve B."

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    • 197 CANDIDATES and 104 VALIDATED PLANETS in K2's FIRST FIVE FIELDS 

      Crossfield, Ian J M; Ciardi, David R.; Petigura, Erik A.; Sinukoff, Evan; Schlieder, Joshua E.; Howard, Andrew W.; Beichman, Charles A.; Isaacson, Howard; Dressing, Courtney D.; Christiansen, Jessie L.; Fulton, Benjamin J.; Lépine, Sébastien; Weiss, Lauren; Hirsch, Lea; Livingston, John; Baranec, Christoph; Law, Nicholas M.; Riddle, Reed; Ziegler, Carl; Howell, Steve B.; Horch, Elliott; Everett, Mark; Teske, Johanna; Martinez, Arturo O.; Obermeier, Christian; Benneke, Björn; Scott, Nic; Deacon, Niall; Aller, Kimberly M.; Hansen, Brad M S; Mancini, Luigi; Ciceri, Simona; Brahm, Rafael; Jordán, Andrés; Knutson, Heather A.; Henning, Thomas; Bonnefoy, Michaël; Liu, Michael C.; Crepp, Justin R.; Lothringer, Joshua; Hinz, Phil; Bailey, Vanessa; Skemer, Andrew; Defrere, Denis (2016-09-02)
      We present 197 planet candidates discovered using data from the first year of the NASA K2 mission (Campaigns 0-4), along with the results of an intensive program of photometric analyses, stellar spectroscopy, high-resolution ...

    • Detection of Planetary and Stellar Companions to Neighboring Stars via a Combination of Radial Velocity and Direct Imaging Techniques 

      Kane, Stephen R.; Dalba, Paul A.; Li, Zhexing; Horch, Elliott P.; Hirsch, Lea A.; Horner, Jonathan; Wittenmyer, Robert A.; Howell, Steve B.; Everett, Mark E.; Butler, R. Paul; Tinney, Christopher G.; Carter, Brad D.; Wright, Duncan J.; Jones, Hugh R. A.; Bailey, Jeremy; O'Toole, Simon J. (2019-06-04)
      The sensitivities of radial velocity (RV) surveys for exoplanet detection are extending to increasingly longer orbital periods, where companions with periods of several years are now being regularly discovered. Companions ...

    • Kepler-1649b: : An Exo-Venus in the Solar Neighborhood 

      Angelo, Isabel; Rowe, Jason F.; Howell, Steve B.; Quintana, Elisa V.; Still, Martin; Mann, Andrew W.; Burningham, Ben; Barclay, Thomas; Ciardi, David R.; Huber, Daniel (2017-03-17)
      The Kepler mission has revealed that Earth-sized planets are common, and dozens have been discovered to orbit in or near their host star's habitable zone. A major focus in astronomy is to determine which of these exoplanets ...

    • Kepler-424 b: A "lonely" hot Jupiter that found a companion 

      Endl, Michael; Caldwell, Douglas A.; Barclay, Thomas; Huber, Daniel; Isaacson, Howard; Buchhave, Lars A.; Brugamyer, Erik; Robertson, Paul; Cochran, William D.; MacQueen, Phillip J.; Havel, Mathieu; Lucas, P.W.; Howell, Steve B.; Fischer, Debra; Quintana, Elisa; Ciardi, David R. (2014-11-10)

    • Masses, radii, and orbits of small Kepler planets : The transition from gaseous to rocky planets 

      Marcy, Geoffrey W.; Isaacson, Howard; Howard, Andrew W.; Rowe, Jason F.; Jenkins, Jon M.; Bryson, Stephen T.; Latham, David W.; Howell, Steve B.; Gautier, Thomas N.; Batalha, Natalie M.; Rogers, Leslie; Ciardi, David; Fischer, Debra A.; Gilliland, Ronald L.; Kjeldsen, H.; Christensen-Dalsgaard, J.; Huber, Daniel; Chaplin, William J.; Basu, S.; Buchhave, Lars A.; Quinn, Samuel N.; Borucki, William J.; Koch, David G.; Hunter, Roger; Caldwell, Douglas A.; Van Cleve, Jeffrey; Kolbl, Rea; Weiss, Lauren M.; Petigura, Erik; Seager, Sara; Morton, Timothy; Johnson, John Asher; Ballard, Sarah; Burke, Chris; Cochran, William D.; Endl, Michael; MacQueen, Phillip; Everett, Mark E.; Lissauer, Jack J.; Ford, Eric B.; Torres, Guillermo; Fressin, Francois; Brown, Timothy M.; Steffen, Jason H.; Charbonneau, David; Basri, G.; Sasselov, Dimitar D.; Winn, Joshua; Sanchis-Ojeda, Roberto; Christiansen, Jessie; Adams, Elisabeth; Henze, Christopher; Dupree, Andrea; Fabrycky, Daniel C.; Fortney, Jonathan J.; Tarter, Jill; Holman, Matthew J.; Tenenbaum, Peter; Shporer, Avi; Lucas, P.W.; Welsh, William F.; Orosz, Jerome A.; Bedding, T.R.; Campante, T.L.; Davies, G.R.; Elsworth, Y.; Handberg, R.; Hekker, S.; Karoff, C.; Kawaler, S.D.; Lund, M.N.; Lundkvist, M.; Metcalfe, T.S.; Miglio, A.; Silva Aguirre, V.; Stello, D.; White, T.R.; Boss, Alan; DeVore, E.; Gould, Alan; Prsa, A.; Agol, Eric; Barclay, Thomas; Coughlin, Jeff; Brugamyer, Erik; Mullally, Fergal; Quintana, Elisa V.; Still, Martin; Thompson, Susan E.; Morrison, David; Twicken, Joseph D.; Desert, Jean-Michel; Carter, Josh; Crepp, Justin R.; Hebrard, Guillaume; Santerne, Alexandre; Moutou, Claire; Sobeck, Charlie; Hudgins, Douglas; Haas, Michael R.; Robertson, Paul; Lillo-Box, Jorge; Barrado, David (2014-01-13)
      We report on the masses, sizes, and orbits of the planets orbiting 22 Kepler stars. There are 49 planet candidates around these stars, including 42 detected through transits and 7 revealed by precise Doppler measurements ...

    • A nearby m star with three transiting super-earths discovered by k2 

      Crossfield, Ian J M; Petigura, Erik; Schlieder, Joshua E.; Howard, Andrew W.; Fulton, B. J.; Aller, Kimberly M.; Ciardi, David R.; Lépine, Sébastien; Barclay, Thomas; Pater, Imke De; Kleer, Katherine De; Quintana, Elisa V.; Christiansen, Jessie L.; Schlafly, Eddie; Kaltenegger, Lisa; Crepp, Justin R.; Henning, Thomas; Obermeier, Christian; Deacon, Niall; Weiss, Lauren M.; Isaacson, Howard T.; Hansen, Brad M S; Liu, Michael C.; Greene, Tom; Howell, Steve B.; Barman, Travis; Mordasini, Christoph (2015-05-01)
      Small, cool planets represent the typical end-products of planetary formation. Studying the architectures of these systems, measuring planet masses and radii, and observing these planets' atmospheres during transit directly ...

    • Nova-like Cataclysmic Variables in the Infrared 

      Hoard, D. W.; Long, Knox S.; Howell, Steve B.; Wachter, Stefanie; Brinkworth, Carolyn S.; Knigge, Christian; Drew, J.E.; Szkody, Paula; Kafka, S.; Belle, Kunegunda; Ciardi, David R.; Froning, Cynthia S.; van Belle, Gerard T.; Pretorius, M. L. (2014-05)
      Novalike cataclysmic variables have persistently high mass transfer rates and prominent steady state accretion disks. We present an analysis of infrared observations of twelve novalikes obtained from the Two Micron All Sky ...

    • Revised Architecture and Two New Super-Earths in the HD 134606 Planetary System 

      Li, Zhexing; Kane, Stephen R.; Brandt, Timothy D.; Fetherolf, Tara; Robertson, Paul; Zhao, Jinglin; Dalba, Paul A.; Wittenmyer, Robert A.; Butler, R. Paul; Diaz, Matias R.; Howell, Steve B.; Bailey, Jeremy; Carter, Brad; Furlan, Elise; Gnilka, Crystal L.; Jones, Hugh R. A.; O'Toole, Simon; Tinney, Chris (2024-04-01)
      Multiplanet systems exhibit a diversity of architectures that diverge from the solar system and contribute to the topic of exoplanet demographics. Radial velocity (RV) surveys form a crucial component of exoplanet surveys, ...

    • 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.; Desert, Jean-Michel; Fressin, Francois; Holman, Matthew J.; 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 W.; Li, Jie; Lucas, P.W.; 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 (2012-04)
      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 ...

    • 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 J.; 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.; Desert, 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 W.; Li, Jie; Lucas, P.W.; 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 (2012-05-10)
      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 ...