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Browsing MIT Open Access Articles by Author "Seager, Sara"

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Browsing MIT Open Access Articles by Author "Seager, Sara"

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  • Pong, Christopher Masaru; Lim, Sungyung; Smith, Matthew William; Miller, David W.; Villasenor, Jesus Noel Samonte; Seager, Sara (SPIE, 2010-07)
    ExoplanetSat is a proposed three-unit CubeSat designed to detect down to Earth-sized exoplanets in an orbit out to the habitable zone of Sun-like stars via the transit method. To achieve the required photometric precision ...
  • 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 (IOP Publishing, 2009-07)
    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 ...
  • Seager, Sara; Schrenk, Matthew; Bains, William (Mary Ann Liebert, 2012-01)
    Microbial life on Earth uses a wide range of chemical and energetic resources from diverse habitats. An outcome of this microbial diversity is an extensive and varied list of metabolic byproducts. We review key points of ...
  • Charbonneau, David; Fortney, Jonathan J.; Desert, Jean-Michel; Madhusudhan, Nikku; Knutson, Heather A.; Fressin, Fran¸cois; Deming, Drake; Borucki, William J.; Brown, Timothy M.; Caldwell, Douglas; Ford, Eric B.; Gilliland, Ronald L.; Latham, David W.; Marcy, Geoffrey W.; Seager, Sara (IOP Publishing, 2011-11)
    This paper reports the detection and the measurements of occultations of the two transiting hot giant exoplanets Kepler-5b and Kepler-6b by their parent stars. The observations are obtained in the near-infrared with ...
  • Benneke, Bjoern; Seager, Sara (IOP Publishing, 2012-06)
    We present a retrieval method based on Bayesian analysis to infer the atmospheric compositions and surface or cloud-top pressures from transmission spectra of exoplanets with general compositions. In this study, we identify ...
  • Seager, Sara; Bains, William; Hu, Rui (IOP Publishing, 2013-09)
    Biosignature gas detection is one of the ultimate future goals for exoplanet atmosphere studies. We have created a framework for linking biosignature gas detectability to biomass estimates, including atmospheric photochemistry ...
  • Seager, Sara; Bains, William; Hu, Renyu (Institute of Physics Publishing, 2013-11)
    Super-Earth exoplanets are being discovered with increasing frequency and some will be able to retain stable H2-dominated atmospheres. We study biosignature gases on exoplanets with thin H2 atmospheres and habitable surface ...
  • Seager, Sara (IOP Publishing, 2011-01)
    In the spring of 2009, the Kepler Mission commenced high-precision photometry on nearly 156,000 stars to determine the frequency and characteristics of small exoplanets, conduct a guest observer program, and obtain ...
  • Seager, Sara (IOP Publishing, 2011-06)
    On 2011 February 1 the Kepler mission released data for 156,453 stars observed from the beginning of the science observations on 2009 May 2 through September 16. There are 1235 planetary candidates with transit-like ...
  • Bains, William; Seager, Sara (Mary Ann Liebert, Inc., 2012-03)
    Redox chemistry is central to life on Earth. It is well known that life uses redox chemistry to capture energy from environmental chemical energy gradients. Here, we propose that a second use of redox chemistry, related ...
  • Gillon, M.; Deming, D.; Lovis, C.; Cubillos, P.; Harrington, J.; Stevenson, K. B.; Mayor, M.; Pepe, F.; Queloz, D.; Ségransan, D.; Udry, S.; Demory, Brice-Olivier; Valencia, Diana; Seager, Sara; Benneke, Bjoern (EDP Sciences, 2011-09)
    We report on the detection of a transit of the super-Earth 55 Cnc e with warm Spitzer in IRAC’s 4.5 μm band. Our MCMC analysis includes an extensive modeling of the systematic effects affecting warm Spitzer photometry, and ...
  • O’Donovan, Francis T.; Charbonneau, David; Harrington, Joseph; Madhusudhan, Nikku; Seager, Sara (IOP Publishing, 2010-02)
    We present here the results of our observations of TrES-2 using the Infrared Array Camera on Spitzer. We monitored this transiting system during two secondary eclipses, when the planetary emission is blocked by the star. ...
  • Demory, Brice-Olivier; Gillon, Michael; Seager, Sara; Deming, Drake; Jackson, Brian (Institute of Physics Publishing, 2012-05)
    We report on the detection of infrared light from the super-Earth 55 Cnc e, based on four occultations obtained with Warm Spitzer at 4.5 μm. Our data analysis consists of a two-part process. In a first step, we perform ...
  • Soummer, Rémi; Valenti, Jeff; Brown, Robert A.; Tumlinson, Jason; Postman, Marc; Mountain, Matt; Seager, Sara; Cash, Webster; Jordan, Ian; Glassman, Tiffany; Pueyo, Laurent; Roberge, Aki (Society of Photo-optical Instrumentation Engineers, 2010-06)
    A starshade with the James Webb Space Telescope (JWST) is the only possible path forward in the next decade to obtain images and spectra of a planet similar to the Earth, to study its habitability, and search for signs of ...
  • Demory, Brice-Olivier; Seager, Sara (IOP Publishing, 2011-10)
    We report the discovery of planet Kepler-12b (KOI-20), which at 1.695 ± 0.030 R [subscript J] is among the handful of planets with super-inflated radii above 1.65 R [subscript J]. Orbiting its slightly evolved G0 host with ...
  • Seager, Sara; Winn, Joshua Nathan; Ricker, George R.; Deming, D.; Miller-Ricci, E.; Clampin, M.; Lindler, D.; Greene, T.; Charbonneau, D.; Laughlin, G.; Latham, D.; Ennico, K. (University of Chicago Press, The, 2009-08)
    Doppler and transit surveys are finding extrasolar planets of ever smaller mass and radius, and are now sampling the domain of super Earths (1–3R⊕). Recent results from the Doppler surveys suggest that discovery of a ...
  • Seager, Sara; Welsh, William F.; Orosz, Jerome A.; Fortney, Jonathan J.; Jenkins, Jon; Rowe, Jason F.; Koch, David; Borucki, William J. (IOP Publishing, 2010-03)
    We present an analysis of the early Kepler observations of the previously discovered transiting planet HAT-P-7b. The light curve shows the transit of the star, the occultation of the planet, and the orbit phase-dependent ...
  • Seager, Sara; Robinson, Tyler D.; Meadows, Victoria S.; Crisp, David; Deming, Drake; A'Hearn, Michael F.; Charbonneau, David; Livengood, Timothy A.; Barry, Richard K.; Hearty, Thomas; Hewagama, Tilak; Lisse, Carey M.; McFadden, Lucy A.; Wellnitz, Dennis D. (Mary Ann Liebert, Inc., 2011-01)
    The EPOXI Discovery Mission of Opportunity reused the Deep Impact flyby spacecraft to obtain spatially and temporally resolved visible photometric and moderate resolution near-infrared (NIR) spectroscopic observations of ...
  • Seager, Sara; Demory, Brice-Olivier; Bonfils, Xavier; Deming, D.; Triaud, Amaury H.M.J.; Gillon, M. (EDP Sciences, 2010-11)
    Because the planets of a system form in a flattened disk, they are expected to share similar orbital inclinations at the end of their formation. The high-precision photometric monitoring of stars known to host a transiting ...
  • Gelman, S. E.; Elkins-Tanton, Linda T.; Seager, Sara (IOP Publishing, 2011-06)
    We model the geodynamical evolution of super-Earth exoplanets in synchronous rotation about their star. While neglecting the effects of a potential atmosphere, we explore the parameter spaces of both the Rayleigh number ...
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