165 citations · 754 across the 10 of their papers we have counts for
4 papers · 1 filter
Long period planets from dynamical relaxation
Caleb Scharf, Kristen Menou
Recent imaging campaigns indicate the likely existence of massive planets (~ 1-10 MJ) on ~1000 year orbits about a few percent of stars. Such objects are not easily explained in mo…
Habitable Climates: The Influence of Obliquity
David S. Spiegel, Kristen Menou, Caleb A. Scharf
Extrasolar terrestrial planets with the potential to host life might have large obliquities or be subject to strong obliquity variations. We revisit the habitability of oblique pla…
Habitable Climates
David S. Spiegel, Kristen Menou, Caleb A. Scharf
According to the standard liquid-water definition, the Earth is only partially habitable. We reconsider planetary habitability in the framework of energy-balance models, the simple…
A possible dearth of hot gas in galaxy groups at intermediate redshift
David S. Spiegel, Frits Paerels, Caleb A. Scharf
We examine the X-ray luminosity of galaxy groups in the CNOC2 survey, at redshifts 0.1 < z < 0.6. Previous work examining the gravitational lensing signal of the CNOC2 groups has s…