Browsing Faculty of Arts and Sciences by Author "Cowan, Nicolas B."

Now showing items 1-13 of 13

    • The 4.5 µm full-orbit phase curve of the hot Jupiter HD 209458B 

      Zellem, Robert T.; Lewis, Nikole K.; Knutson, Heather A.; Griffith, Caitlin A.; Showman, Adam P.; Fortney, Jonathan J.; Cowan, Nicolas B.; Agol, Eric; Burrows, Adam; Charbonneau, David; Deming, Drake; Laughlin, Gregory; Langton, Jonathan (IOP Publishing, 2014)
      The hot Jupiter HD 209458b is particularly amenable to detailed study as it is among the brightest transiting exoplanet systems currently known (V-mag = 7.65; K-mag = 6.308) and has a large planet-to-star contrast ratio. ...

    • A Spitzer Transmission Spectrum for the Exoplanet Gj 436b, Evidence for Stellar Variability, and Constraints on Dayside Flux Variations 

      Knutson, Heather A.; Madhusudhan, Nikku; Cowan, Nicolas B.; Christiansen, Jessie L.; Agol, Eric; Deming, Drake; Désert, Jean-Michel; Charbonneau, David; Henry, Gregory W.; Homeier, Derek; Langton, Jonathan; Laughlin, Gregory; Seager, Sara (American Astronomical Society, 2011)
      In this paper, we describe a uniform analysis of eight transits and eleven secondary eclipses of the extrasolar planet GJ 436b obtained in the 3.6, 4.5, and 8.0 mu m bands using the IRAC instrument on the Spitzer Space ...

    • Alien Maps of an Ocean-Bearing World 

      Cowan, Nicolas B.; Agol, Eric; Meadows, Victoria S.; Robinson, Tyler; Livengood, Timothy A.; Deming, Drake; Lisse, Carey M.; A'Hearn, Michael F.; Wellnitz, Dennis D.; Seager, Sara; Charbonneau, David (Institute of Physics, 2009)
      When Earth-mass extrasolar planets first become detectable, one challenge will be to determine which of these worlds harbor liquid water, a widely used criterion for habitability. Some of the first observations of these ...

    • Multiwavelength Constraints on the Day-night Circulation Patterns of Hd 189733b 

      Knutson, Heather A.; Charbonneau, David; Cowan, Nicolas B.; Fortney, Jonathan J.; Showman, Adam P.; Agol, Eric; Henry, Gregory W.; Everett, Mark E.; Allen, Lori E. (American Astronomical Society, 2009)
      We present new Spitzer observations of the phase variation of the hot Jupiter HD 189733b in the MIPS 24 mu m bandpass, spanning the same part of the planet's orbit as our previous observations in the IRAC 8 mu m bandpass ...

    • Orbital Phase Variations of the Eccentric Giant Planet Hat-P-2b 

      Lewis, Nikole K.; Knutson, Heather A.; Showman, Adam P.; Cowan, Nicolas B.; Laughlin, Gregory; Burrows, Adam; Deming, Drake; Crepp, Justin R.; Mighell, Kenneth J.; Agol, Eric; Bakos, Gáspár Á.; Charbonneau, David; Désert, Jean-Michel; Fischer, Debra A.; Fortney, Jonathan J.; Hartman, Joel D.; Hinkley, Sasha; Howard, Andrew W.; Johnson, John Asher; Kao, Melodie; Langton, Jonathan; Marcy, Geoffrey W. (IOP Publishing, 2013)
      We present the first secondary eclipse and phase curve observations for the highly eccentric hot Jupiter HAT-P-2b in the 3.6, 4.5, 5.8, and 8.0 μm bands of the Spitzer Space Telescope. The 3.6 and 4.5 μm data sets span an ...

    • Rotational Variability of Earth's Polar Regions: Implications for Detecting Snowball Planets 

      Cowan, Nicolas B.; Robinson, Tyler; Livengood, Timothy A.; Deming, Drake; Agol, Eric; A'Hearn, Michael F.; Charbonneau, David; Lisse, Carey M.; Meadows, Victoria S.; Seager, Sara; Shields, Aomawa L.; Wellnitz, Dennis D. (American Astronomical Society, 2011)
      We have obtained the first time-resolved, disk-integrated observations of Earth's poles with the Deep Impact spacecraft as part of the EPOXI mission of opportunity. These data mimic what we will see when we point next-generation ...

    • Secondary Eclipse Photometry of the Exoplanet Wasp-5b With Warm Spitzer 

      Baskin, Nathaniel J.; Knutson, Heather A.; Burrows, Adam; Fortney, Jonathan J.; Lewis, Nikole K.; Agol, Eric; Charbonneau, David; Cowan, Nicolas B.; Deming, Drake; Desert, Jean-Michel; Langton, Jonathan; Laughlin, Gregory; Showman, Adam P. (IOP Publishing, 2013)
      We present secondary eclipse photometry of the extrasolar planet WASP-5b taken in the 3.6 and 4.5 μm bands with the Spitzer Space Telescope's Infrared Array Camera as part of the extended warm mission. By estimating the ...

    • Secondary Eclipse Photometry of Wasp-4b with Warmspitzer 

      Beerer, Ingrid M.; Knutson, Heather A.; Burrows, Adam; Fortney, Jonathan J.; Agol, Eric; Charbonneau, David; Cowan, Nicolas B.; Deming, Drake; Desert, Jean-Michel; Langton, Jonathan; Laughlin, Gregory; Lewis, Nikole K.; Showman, Adam P. (American Astronomical Society, 2011)
      We present photometry of the giant extrasolar planet WASP-4b at 3.6 and 4.5 mu m taken with the Infrared Array Camera on board the Spitzer Space Telescope as part of Spitzer's extended warm mission. We find secondary eclipse ...

    • The 8 Μm Phase Variation of the Hot Saturn Hd 149026b 

      Knutson, Heather A.; Charbonneau, David; Cowan, Nicolas B.; Fortney, Jonathan J.; Showman, Adam P.; Agol, Eric; Henry, Gregory W. (American Astronomical Society, 2009)

    • The Climate of Hd 189733b From Fourteen Transits and Eclipses Measured by Spitzer 

      Agol, Eric; Cowan, Nicolas B.; Knutson, Heather A.; Deming, Drake; Steffen, Jason H.; Henry, Gregory W.; Charbonneau, David (American Astronomical Society, 2010)
      We present observations of six transits and six eclipses of the transiting planet system HD 189733 taken with the Spitzer Space Telescope's Infrared Array Camera (IRAC) at 8 mu m, as well as a re-analysis of previously ...

    • Transiting Exoplanet Studies and Community Targets for JWST 's Early Release Science Program 

      Stevenson, Kevin B.; Lewis, Nikole K.; Bean, Jacob L.; Beichman, Charles; Fraine, Jonathan; Kilpatrick, Brian M.; Krick, J. E.; Lothringer, Joshua D.; Mandell, Avi M.; Valenti, Jeff A.; Agol, Eric; Angerhausen, Daniel; Barstow, Joanna K.; Birkmann, Stephan M.; Burrows, Adam; Charbonneau, David; Cowan, Nicolas B.; Crouzet, Nicolas; Cubillos, Patricio E.; Curry, S. M.; Dalba, Paul A.; de Wit, Julien; Deming, Drake; Désert, Jean-Michel; Doyon, René; Dragomir, Diana; Ehrenreich, David; Fortney, Jonathan J.; García Muñoz, Antonio; Gibson, Neale P.; Gizis, John E.; Greene, Thomas P.; Harrington, Joseph; Heng, Kevin; Kataria, Tiffany; Kempton, Eliza M.-R.; Knutson, Heather; Kreidberg, Laura; Lafrenière, David; Lagage, Pierre-Olivier; Line, Michael R.; Lopez-Morales, Mercedes; Madhusudhan, Nikku; Morley, Caroline V.; Rocchetto, Marco; Schlawin, Everett; Shkolnik, Evgenya L.; Shporer, Avi; Sing, David K.; Todorov, Kamen O.; Tucker, Gregory S.; Wakeford, Hannah R. (IOP Publishing, 2016)
      The James Webb Space Telescope (JWST) will likely revolutionize transiting exoplanet atmospheric science due to a combination of its capability for continuous, long duration observations and its larger collecting area, ...

    • Warm Spitzer Observations of Three Hot Exoplanets: Xo-4b, Hat-p-6b, and Hat-p-8b 

      Todorov, Kamen O.; Deming, Drake; Knutson, Heather A.; Burrows, Adam; Sada, Pedro V.; Cowan, Nicolas B.; Agol, Eric; Desert, Jean-Michel; Fortney, Jonathan J.; Charbonneau, David; Laughlin, Gregory; Langton, Jonathan; Showman, Adam P.; Lewis, Nikole K. (American Astronomical Society, 2012)
      We analyze Warm Spitzer/Infrared Array Camera observations of the secondary eclipses of three planets, XO-4b, HAT-P-6b, and HAT-P-8b. We measure secondary eclipse amplitudes at 3.6 mu m and 4.5 mu m for each target. XO-4b ...

    • Warm spritzer photometry of three hot Jupiters: HAT-P-3b, HAT-P-4b and HAT-P-12b 

      Todorov, Kamen O.; Deming, Drake; Knutson, Heather A.; Burrows, Adam; Fortney, Jonathan J.; Lewis, Nikole K.; Cowan, Nicolas B.; Agol, Eric; Desert, Jean-Michel; Sada, Pedro V.; Charbonneau, David; Laughlin, Gregory; Langton, Jonathan; Showman, Adam P. (IOP Publishing, 2013)
      We present Warm Spitzer/IRAC secondary eclipse time series photometry of three short-period transiting exoplanets, HAT-P-3b, HAT-P-4b and HAT-P-12b, in both the available 3.6 and 4.5 µm bands. HAT-P-3b and HAT-P-4b are ...