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Extreme Climate Variations from Milankovitch-like Eccentricity Oscillations in Extrasolar Planetary Systems
David S. Spiegel
Although our solar system features predominantly circular orbits, the exoplanets discovered so far indicate that this is the exception rather than the rule. This could have crucial…
The formation of high-field magnetic white dwarfs from common envelopes
J. Nordhaus, S. Wellons, D. S. Spiegel +2
The origin of highly-magnetized white dwarfs has remained a mystery since their initial discovery. Recent observations indicate that the formation of high-field magnetic white dwar…
The Deuterium-Burning Mass Limit for Brown Dwarfs and Giant Planets
David S. Spiegel, Adam Burrows, John A. Milsom
There is no universally acknowledged criterion to distinguish brown dwarfs from planets. Numerous studies have used or suggested a definition based on an object's mass, taking the…
Atmosphere and Spectral Models of the Kepler-Field Planets HAT-P-7b and TrES-2
David S. Spiegel, Adam Burrows
We develop atmosphere models of two of the three Kepler-field planets that were known prior to the start of the Kepler mission (HAT-P-7b and TrES-2). We find that published Kepler…
Generalized Milankovitch Cycles and Longterm Climatic Habitability
David S. Spiegel, Sean N. Raymond, Courtney D. Dressing +2
Although the Earth's orbit is never far from circular, terrestrial planets around other stars might experience substantial changes in eccentricity that could lead to climate change…
Habitable Climates: The Influence of Eccentricity
Courtney D. Dressing, David S. Spiegel, Caleb A. Scharf +2
In the outer regions of the habitable zone, the risk of transitioning into a globally frozen "snowball" state poses a threat to the habitability of planets with the capacity to hos…