Search Results for author: Nicolas B. Cowan

Found 5 papers, 4 papers with code

exocartographer: A Bayesian Framework for Mapping Exoplanets in Reflected Light

1 code implementation19 Feb 2018 Ben Farr, Will M. Farr, Nicolas B. Cowan, Hal M. Haggard, Tyler Robinson

To test the code, we produce a light curve for a cloudless Earth in a face-on orbit with a 90$^\circ$ obliquity.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics

Analytic Reflected Lightcurves for Exoplanets

1 code implementation6 Feb 2018 Hal M. Haggard, Nicolas B. Cowan

We have previously derived analytic reflected lightcurves for spherical harmonic albedo maps in the special case of a synchronously-rotating planet on an edge-on orbit (Cowan, Fuentes & Haggard 2013).

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics

Detection of a Westward Hotspot Offset in the Atmosphere of a Hot Gas Giant CoRoT-2b

1 code implementation19 Jan 2018 Lisa Dang, Nicolas B. Cowan, Joel C. Schwartz, Emily Rauscher, Michael Zhang, Heather A. Knutson, Michael Line, Ian Dobbs-Dixon, Drake Deming, Sudarsan Sundararajan, Jonathan J. Fortney, Ming Zhao

The peculiar infrared flux map of CoRoT-2b may result from westward winds due to non-synchronous rotation magnetic effects, or partial cloud coverage, that obscures the emergent flux from the planet's eastern hemisphere.

Earth and Planetary Astrophysics

Inferring Planetary Obliquity Using Rotational & Orbital Photometry

no code implementations16 Nov 2015 Joel C. Schwartz, Clara Sekowski, Hal M. Haggard, Eric Pallé, Nicolas B. Cowan

Reflected light seen by a distant observer is the product of a planet's albedo map, its host star's illumination, and the visibility of different regions.

Earth and Planetary Astrophysics

A Model for Thermal Phase Variations of Circular and Eccentric Exoplanets

1 code implementation1 Nov 2010 Nicolas B. Cowan, Eric Agol

We present a semi-analytic model atmosphere for close-in exoplanets that captures the essential physics of phase curves: orbital and viewing geometry, advection, and re-radiation.

Earth and Planetary Astrophysics

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